fix(share): terminal scrollback for large output

Render with pyte.HistoryScreen and show scrollback + screen, so large output
(ls -la, cat, etc.) can be scrolled up to read. Auto-scroll to the bottom only
when already at the bottom; preserve position when the user has scrolled up.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -27,12 +27,39 @@ jobs:
           python -m pip install --upgrade build
           python -m build
 
+      - name: Build self-extracting installer (.run)
+        run: python packaging/make_run.py
+
       - name: Read version
         id: ver
         run: |
           V=$(python -c "import tomllib; print(tomllib.load(open('pyproject.toml','rb'))['project']['version'])")
           echo "version=$V" >> "$GITHUB_OUTPUT"
 
+      - name: Build release notes
+        run: |
+          python - <<'PY'
+          import json
+          version = "${{ steps.ver.outputs.version }}"
+          tag = f"v{version}"
+          out, capturing = [], False
+          try:
+              for line in open("CHANGELOG.md", encoding="utf-8").read().splitlines():
+                  if line.startswith("## "):
+                      if capturing:
+                          break
+                      capturing = line.startswith(f"## [{version}]")
+                      continue
+                  if capturing:
+                      out.append(line)
+          except OSError:
+              pass
+          body = "\n".join(out).strip() or f"Release {tag}."
+          payload = {"tag_name": tag, "target_commitish": "${{ github.sha }}", "name": tag, "body": body}
+          open("/tmp/release.json", "w", encoding="utf-8").write(json.dumps(payload))
+          print(f"release notes: {len(body)} chars")
+          PY
+
       - name: Publish Gitea release
         env:
           TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -52,7 +79,7 @@ jobs:
           rid=$(curl -sS -X POST \
             -H "Authorization: token ${TOKEN}" \
             -H "Content-Type: application/json" \
-            -d "{\"tag_name\":\"${TAG}\",\"target_commitish\":\"${{ github.sha }}\",\"name\":\"${TAG}\",\"body\":\"Automated release for ${TAG}. See CHANGELOG.md.\"}" \
+            -d @/tmp/release.json \
             "${API}/releases" | python -c "import sys, json; print(json.load(sys.stdin)['id'])")
 
           for f in dist/*; do

CHANGELOG.md

@@ -5,6 +5,162 @@ All notable changes to RigDoctor are recorded here. Format follows
 (`MAJOR.MINOR.PATCH`, pre-1.0). `__version__` and `pyproject.toml` must match the git
 release tag (so the auto-updater, D18, can compare versions).
 
+## [0.7.3] - 2026-05-21
+### Fixed
+- Shared terminal now has **scrollback** — large output (e.g. `ls -la`) can be scrolled up to
+  read; it keeps a history buffer and only auto-scrolls to the bottom when you're already there.
+
+## [0.7.2] - 2026-05-21
+### Changed
+- Removed the GUI **Inventory** tab — use the CLI `rigdoctor inventory` instead. (Inventory is
+  still collected for the relay guest view, so a remote helper still sees the host's hardware.)
+### Fixed
+- Shared terminal caret now sits at the real cursor position (row **and** column) instead of
+  the start of the line.
+
+## [0.7.1] - 2026-05-21
+### Fixed
+- Shared terminal: a guest who joined **after** the host enabled the terminal stayed read-only.
+  The host now re-sends the terminal state when a guest joins, so the terminal is available.
+- Inventory page no longer jumps back to the top when it refreshes (e.g. when elevated data
+  arrives) — scroll position is preserved and unchanged data isn't re-rendered.
+- Shared terminal now follows the cursor to the bottom as output arrives (e.g. `ls -la`),
+  instead of staying scrolled up.
+
+## [0.7.0] - 2026-05-21
+### Added
+- **Shared terminal (M12, Tier 3)**: when the host enables it, the session shares a real **PTY**
+  shell — the guest gets an interactive terminal (vim, top, tab-completion, Ctrl-C) running on
+  the host as the host's user. The host **reads along** live and can type too, e.g. a `sudo`
+  password — which stays local and is never sent to the guest. Off by default, host-consented.
+  The guest also pulls the host's inventory on join.
+### Fixed
+- **Input contrast**: all form controls (text fields, spin boxes, combo boxes, terminals) now
+  use the dark theme with readable text (Fusion defaulted them to light-on-light).
+
+## [0.6.0] - 2026-05-21
+### Added
+- **Session sharing over the relay (M12)**: a **Share** tab — *Start shared session* (host)
+  hands you a short code and streams a read-only live view; *Enter share code* (guest) joins
+  someone else's session and views their sensors/health/inventory. Both connect outbound over
+  WebSocket to the relay (`relay_url`, default `wss://rigdoctor.jesseyvanofferen.com`), gated
+  by your Gitea access token — no port forwarding. Read-only.
+
+## [0.5.0] - 2026-05-21
+### Added
+- **Session sharing (M12, Tier 2)**: `rigdoctor share serve` starts a **read-only** live view
+  (sensors auto-refresh + health report + inventory) over a local HTTP server, gated by a
+  random share token. Bind to localhost for local testing, or to all interfaces behind a
+  user-chosen tunnel (Tailscale/cloudflared/SSH) for remote help. No actions, no terminal.
+  (Tier 1 export and Tier 3 gated terminal still to come — D16.)
+
+## [0.4.1] - 2026-05-21
+### Fixed
+- Checkbox contrast: a checked checkbox is now a clear accent-filled box with a checkmark
+  (was hard to tell checked from unchecked on the dark theme).
+
+## [0.4.0] - 2026-05-21
+### Added
+- **Alerts (M8)**: desktop notifications (via `notify-send`) for **overheat** (GPU/CPU past a
+  threshold), **GPU-lost** (nvidia-smi timeout), and a **new version available** (fired once
+  per version). Edge-triggered with a cooldown so it doesn't spam. Degrades gracefully if
+  `notify-send` isn't installed.
+- **Notifications page**: configure alerts (enable/disable, GPU/CPU temperature thresholds)
+  with a "Send test" button; changes apply live and persist to `config.toml`.
+- **App icon**: ships a RigDoctor icon and shows it in the dock/launcher. The GUI
+  **self-registers** the icon + `.desktop` on launch (and sets the Wayland app-id), so a
+  self-update + relaunch picks it up — no need to re-run the installer.
+
+## [0.3.2] - 2026-05-21
+### Changed
+- Replaced the per-page "Run with admin" buttons with a **single password prompt at launch**
+  (`pkexec`): the GUI collects root-only data (SMART + dmidecode board/BIOS/RAM) once and
+  caches it for the session, so Health and Inventory always show the full picture. Falls back
+  to non-root if cancelled/unavailable; disable via `elevate_on_launch = false`.
+
+## [0.3.1] - 2026-05-21
+### Fixed
+- Changelog/release notes now **render Markdown** instead of showing raw `#`/`**` markup —
+  the in-app changelog uses `QTextEdit.setMarkdown()` and the update prompt renders notes as
+  rich text (closes #1).
+
+## [0.3.0] - 2026-05-21
+### Added
+- **System inventory (M5)**: CPU, GPU (model/driver/VBIOS/VRAM/PCIe), motherboard/BIOS, RAM
+  (total + modules), storage, kernel, and display server. CLI `rigdoctor inventory`
+  (`--json` / `--markdown` / `--output`) and a GUI **Inventory** tab with Copy-as-Markdown,
+  Save, and "Run with admin" (for `dmidecode` board/BIOS/RAM details). Fills the last GUI tab.
+
+## [0.2.0] - 2026-05-21
+### Added
+- **"Check for updates" button** in the sidebar — force an immediate version check instead of
+  waiting for the 30-minute poll.
+
+## [0.1.1] - 2026-05-21
+### Fixed
+- Dialogs (the update prompt and changelog) were light-on-light and unreadable — they now use
+  the dark theme with readable text.
+
+## [0.1.0] - 2026-05-21
+_First milestone release — a complete, installable, self-updating RigDoctor: live monitoring,
+crash capture + health report, desktop GUI, user-local install/uninstall, and updates._
+### Added
+- **In-app uninstaller**: "Uninstall RigDoctor" button on the Setup page (and
+  `rigdoctor uninstall [--purge]`) — removes the venv, launchers, and desktop entry, with an
+  option to also wipe settings/token/logs. Runs detached so it can delete its own venv.
+- **In-app changelog**: a "Changelog" link in the sidebar opens the release history (tags +
+  notes) fetched from the update server.
+
+## [0.0.10] - 2026-05-21
+### Added
+- **"Restart now" button** after a successful in-app update — relaunches RigDoctor for you
+  instead of asking you to restart manually.
+- **Real release notes**: CI now sets each Gitea release's body from the matching CHANGELOG
+  section (instead of "Automated release for…"), and the updater shows **"What's new"** — a
+  notes dialog before applying (GUI) and in `rigdoctor update` (CLI).
+### Changed
+- Setup page / `rigdoctor install`: dropped internal module references (M4, M5, …) from the
+  component descriptions — end users don't need them.
+- Adopting **Conventional Commits** + **git-cliff** (`cliff.toml`, `packaging/changelog.sh`)
+  to generate CHANGELOG entries from commit history going forward (D20).
+### Fixed
+- The self-extracting **`.run` installer** is now built **without makeself** (a pure-Python
+  self-extractor, `packaging/make_run.py`), so it reliably attaches to every release — it was
+  silently skipped before because the CI runner couldn't install makeself.
+
+## [0.0.8] - 2026-05-21
+### Added
+- **Periodic update checks**: the GUI now re-checks for new releases while running (every
+  `update_check_minutes`, default 30; 0 disables), so a newly published version is detected
+  without restarting. After applying an update, re-checks stop until restart.
+- **"Run with admin" on the Health page**: runs all checks (including root-only SMART) via
+  `pkexec rigdoctor report --json`, so the full report — not just "SMART needs root" — is
+  available from the UI.
+
+## [0.0.7] - 2026-05-21
+### Added
+- **User-local installer** `install.sh` (no root): creates a private venv, links
+  `rigdoctor`/`rigdoctor-gui` into `~/.local/bin`, and adds a desktop entry. Re-run to
+  upgrade; `--uninstall` to remove.
+- **Self-extracting `.run` installer** via `packaging/make-run.sh` (makeself) — one
+  download-and-run executable bundling the wheel + `install.sh`; built and attached to each
+  release by CI.
+- **Self-update apply (M13)**: `rigdoctor update` now installs the newer version via
+  authenticated pip (`rigdoctor[gui] @ git+https://oauth2:<token>@…@<tag>`); the GUI sidebar
+  "Update to v…" button applies it and prompts to restart. Token is scrubbed from output.
+
+## [0.0.6] - 2026-05-21
+### Added
+- **Token-gated updates (M13)**: store a Gitea Personal Access Token, **encrypted in the OS
+  keyring** (Secret Service / GNOME Keyring via `secret-tool`) with a 0600-file fallback.
+  `rigdoctor login` / `logout` / `update [--check]`; GUI **Setup → Update access** panel
+  (token field, "Get a token", backend status) and sidebar states (connect / up-to-date /
+  "Update to v…" / access denied). Updates are gated to accounts on the Gitea server (D18).
+- `libsecret-tools` added to the installer catalog (enables encrypted token storage).
+### Changed
+- D18 update mechanism revised from anonymous public HTTP to **authenticated HTTP (token)** —
+  the Gitea instance requires sign-in for all anonymous access.
+
 ## [0.0.5] - 2026-05-21
 ### Added
 - **M9 installer (first cut)**: detects distro / package manager / GPU; a catalog of optional

README.md

@@ -63,6 +63,21 @@ Full rationale and the still-open questions are in `docs/DECISIONS.md`.
 | `installer/` | Installer / `.deb` packaging (empty until Phase 4) |
 | `tests/` | Tests (stdlib `unittest`) |
 
+## Install (user-local, no root)
+
+RigDoctor installs into a private venv under `~/.local` — no root, self-updating:
+
+```bash
+./install.sh                 # from a source checkout or the self-extracting .run
+./install.sh --ref v0.0.6    # install a specific released tag (needs a token)
+./install.sh --uninstall     # remove it
+```
+
+This adds `rigdoctor` / `rigdoctor-gui` to `~/.local/bin` and a desktop entry. Each release
+also ships a one-file **`.run`** installer (download, `chmod +x`, run). Updates are gated to
+accounts on the Git server (a Personal Access Token); save one via the GUI **Setup → Update
+access** panel or `rigdoctor login`, then `rigdoctor update` (or the sidebar button).
+
 ## Run it (dev)
 
 Stdlib-only, no install needed (target is Python ≥ 3.11; tested on 3.14):

cliff.toml

@@ -0,0 +1,42 @@
+# git-cliff configuration — generate CHANGELOG.md from Conventional Commits (D20).
+# Run via packaging/changelog.sh.
+
+[changelog]
+header = """
+# Changelog
+
+All notable changes to RigDoctor are recorded here. Format follows
+[Keep a Changelog](https://keepachangelog.com/); versioning is SemVer-style
+(`MAJOR.MINOR.PATCH`, pre-1.0). `__version__` and `pyproject.toml` must match the git
+release tag (so the auto-updater, D18, can compare versions).
+"""
+body = """
+{% for group, commits in commits | group_by(attribute="group") %}
+## {{ group | upper_first }}
+{% for commit in commits %}\
+- {{ commit.message | upper_first }}\
+{% endfor %}
+{% endfor %}
+"""
+trim = true
+
+[git]
+conventional_commits = true
+filter_unconventional = false
+commit_parsers = [
+    { message = "^feat", group = "Added" },
+    { message = "^fix", group = "Fixed" },
+    { message = "^docs", group = "Documentation" },
+    { message = "^perf", group = "Performance" },
+    { message = "^refactor", group = "Changed" },
+    { message = "^chore\\(release\\)", skip = true },
+    { message = "^chore|^build|^ci|^style|^test", group = "Internal" },
+    { message = ".*", group = "Other" },
+]
+tag_pattern = "v[0-9]*"
+sort_commits = "oldest"
+
+[bump]
+# Pre-1.0 rules (D21): feat -> minor, fix -> patch, breaking -> minor (not major).
+features_always_bump_minor = true
+breaking_always_bump_major = false

docs/DECISIONS.md

@@ -152,9 +152,22 @@ reachable from it. This **supersedes the earlier "CLI-first / terminal-first" fr
 - *No change to layering (D2):* the core, CLI, and daemon stay **stdlib-only** and must run
   without Qt. "GUI-first" is about emphasis and front-end parity, not dropping headless support.
 
-### D18 — Auto-update (M13) — *PLANNED 2026-05-21*
+### D18 — Auto-update (M13) — *PLANNED 2026-05-21; mechanism revised 2026-05-21*
 RigDoctor should **check for a newer version on launch and self-update** (new module **M13**).
-**Mechanism (chosen): user-local, no-root self-update from the public repo.**
+**Mechanism (revised): user-local, no-root self-update over authenticated HTTP (token).**
+*Why revised:* the Gitea instance requires sign-in for **all** anonymous access (repo page,
+releases feed, raw, API all 303/403 anonymously), so the original "public HTTP" plan can't
+work. Updates are therefore **gated to people with an account on the Gitea server**, which is
+desirable — access control is delegated to Gitea.
+- *Auth:* each user creates a **Personal Access Token** (scope `read:repository`); RigDoctor
+  stores it at `~/.config/rigdoctor/token` (mode 0600) or reads `RIGDOCTOR_TOKEN`. Requests
+  send `Authorization: token <PAT>`. Finer access = repo visibility/collaborators on Gitea.
+- *Check:* `GET /api/v1/repos/jessey/rigdoctor/releases/latest` with the token; compare tags.
+- *Apply:* `pip install --upgrade "git+https://oauth2:<token>@…/rigdoctor.git@<tag>"` into the
+  user-local venv, then restart (incl. the daemon). No root.
+- *States surfaced:* no-token → "connect to update server"; auth error → "access denied";
+  newer → "Update to v…"; else "up-to-date".
+- *Original (now-superseded) plan was anonymous public HTTP:*
 - *Install model (D8 revised):* primary install is **user-local** (`~/.local`), so the running
   app can replace its own files and update with **no apt, no root, no password prompt**.
 - *Check:* on launch, query the **public Gitea releases API**
@@ -178,12 +191,41 @@ RigDoctor should **check for a newer version on launch and self-update** (new mo
 PATCH for ordinary changes, MINOR for larger milestones). `__version__`
 (`rigdoctor/__init__.py`) and `pyproject.toml` are the single source of truth and **must match
 the git release tag** so the auto-updater (D18) can compare versions. Every change updates
-`CHANGELOG.md` (Keep a Changelog style). *Note:* an early placeholder `0.1.0` was corrected to
+`CHANGELOG.md` — now generated from **Conventional Commits** via git-cliff (see D20).
+*Milestone policy (pre-1.0):* **0.0.x** = early development; **0.1.0** = first complete,
+installable, self-updating release (reached 2026-05-21); **0.x.0** = each later milestone
+(AMD/Intel, unattended logger auto-start, session sharing…); **1.0.0** = broadly stable
+(multi-vendor/distro, no major caveats). PATCH (`0.x.PATCH`) for fixes/small changes. *Note:* an early placeholder `0.1.0` was corrected to
 follow the released **0.0.x** line — first release was **V0.0.1**; current is **0.0.2**.
 
+### D20 — Automated changelog & release notes — *DECIDED 2026-05-21*
+**Release notes are generated from our changes, surfaced in the auto-updater.**
+- *Release body:* CI sets each Gitea release's `body` from the matching `CHANGELOG.md`
+  section (was a hardcoded "Automated release for…"). The updater fetches the release `body`
+  and shows **"What's new"** — a dialog before applying (GUI) and in `rigdoctor update` (CLI).
+- *Generation:* adopt **Conventional Commits** (`feat:`/`fix:`/`docs:`/`chore:` …) and
+  **git-cliff** (`cliff.toml`, `packaging/changelog.sh`) to generate `CHANGELOG.md` from
+  commit history. Refines D19's "hand-write CHANGELOG" to "generate it from conventional
+  commits"; `__version__`/`pyproject.toml`/tag still the source of truth for the version.
+- *CI does not auto-commit the changelog* (avoids push loops) — it's regenerated by the dev
+  via the script when cutting a version; CI only reads the section for the release body.
+
+### D21 — Versioning rules & automation — *DECIDED 2026-05-21*
+The next version is **determined by the Conventional Commit types** since the last release
+(D20), so it can be auto-computed instead of guessed:
+- `fix:` / `perf:` → bump **PATCH**.
+- `feat:` → bump **MINOR** (pre-1.0: `0.MINOR.0`).
+- breaking (`feat!:` / `BREAKING CHANGE:`) → pre-1.0: bump **MINOR** (not major); post-1.0: MAJOR.
+- `docs:` / `chore:` / `refactor:` / `ci:` / `test:` / `style:` alone → **PATCH** (no feature release).
+- Milestone overrides by hand are allowed (e.g., jumping to `1.0.0`); see the milestone policy in D19.
+
+*Automation:* `git-cliff --bumped-version` computes the next version from history;
+`packaging/bump.sh` writes it into `__init__.py` + `pyproject.toml`. Rules live in
+`cliff.toml [bump]` (pre-1.0: `breaking_always_bump_major = false`).
+
 ## Open
 
-None currently — all tracked decisions (D1–D19) are resolved. New questions will be added
+None currently — all tracked decisions (D1–D21) are resolved. New questions will be added
 here as they arise. Remaining detail to flesh out during build: the tray's supporting-action
 set (D13), per-module apt package names, M12's tunnel/token specifics, and M13's
 update mechanism (APT repo vs. self-installed `.deb`).

docs/MODULES.md

@@ -12,13 +12,13 @@ Status: ⬜ not started · 🟦 designing · 🟨 in progress · ✅ done
 | M3 | Crash-capture logger | Essential | none (opt: smartmontools) | all (NVIDIA first) | P0 | 🟨 |
 | M4 | Health report (log scan) | Essential | none (opt: smartmontools) | all (NVIDIA first) | P0 | 🟨 |
 | M2 | Live monitor (TUI) | Monitoring | none (stdlib curses) | all | P1 | ⬜ |
-| M8 | Alerting | Monitoring | libnotify (opt) | all | P2 | ⬜ |
-| M5 | System inventory | Diagnostics | none (opt: lm-sensors, dmidecode) | all | P1 | ⬜ |
+| M8 | Alerting | Monitoring | libnotify (opt) | all | P2 | 🟨 |
+| M5 | System inventory | Diagnostics | none (opt: lm-sensors, dmidecode) | all | P1 | 🟨 |
 | M6 | Gaming env checks | Diagnostics | none | all | P2 | ⬜ |
 | M10 | Desktop GUI | Desktop UI | **python3-pyside6** | all | P2 | 🟨 |
 | M11 | Tray / menu-bar applet | Desktop UI | **python3-pyside6** (+ AppIndicator on GNOME) | all | P2 | ⬜ |
 | M9 | Installer | (meta) | none | all | P1 | 🟨 |
-| M12 | Session sharing / remote assist | Sharing | none (Tier 3: tmate/sshx) | all | P3 | ⬜ |
+| M12 | Session sharing / remote assist | Sharing | none (Tier 3: tmate/sshx) | all | P3 | 🟨 |
 | M13 | Auto-update | (core) | none (stdlib; user-local file swap) | all | P3 | 🟨 |
 | ~~M7~~ | ~~Stress / repro~~ | — | — | — | — | ❌ dropped (D7) |
 
@@ -57,17 +57,26 @@ Status: ⬜ not started · 🟦 designing · 🟨 in progress · ✅ done
   resolution; enables the logger service and trigger mode. *Implemented (first cut):* distro/
   package-manager/GPU detection (`core/sysenv`), an optional-component catalog (`core/catalog`),
   and dependency install via pkexec/sudo — `rigdoctor install [--check] [-y]` + GUI Setup tab.
-  *Pending:* writing config/module selection and enabling the `systemd --user` service.
+  The **user-local app install** is `install.sh` (private venv + `~/.local/bin` launchers +
+  desktop entry, no root; handles the `python3-venv` prerequisite) plus a self-extracting
+  **`.run`** (pure-Python self-extractor, `packaging/make_run.py`, built by CI). *Pending:*
+  config/module selection + `systemd --user`
+  service enable.
 - **M12 Session sharing / remote assist** (D16) — let a helper inspect a user's machine, in
   an escalating ladder: (1) **diagnostic bundle export** (inventory + recent log + report,
   one-way), (2) **live read-only view** over a user-chosen tunnel (Tailscale/cloudflared/SSH,
   no hosted relay), (3) **gated interactive terminal** wrapping tmate/sshx (read-only by
   default; read-write only on explicit consent — a deliberate exception to D9). Per-session
   consent, ephemeral revocable tokens, audit log.
-- **M13 Auto-update** (D18) — *check half implemented:* on GUI launch, `core/updates` queries
-  the Gitea releases API and the sidebar shows up-to-date / an "Update to v…" button / "update
-  check unavailable" (the instance currently requires sign-in for anonymous API calls). The
-  no-root **self-update** (download → verify → atomic swap → restart) is still pending.
+- **M13 Auto-update** (D18) — *check + auth implemented:* updates are **gated to Gitea account
+  holders** via a Personal Access Token, stored **encrypted in the OS keyring** (`secret-tool`)
+  with a 0600-file fallback (`config.load_token`/`save_token`/`token_backend`). `core/updates`
+  queries the releases API with the token; CLI `login`/`logout`/`update`; GUI Setup "Update
+  access" panel + sidebar states. The no-root **self-update apply** is implemented:
+  `rigdoctor update` runs an authenticated `pip install --upgrade "rigdoctor[gui] @
+  git+https://oauth2:<token>@…@<tag>"` into the user-local venv (GUI "Update to v…" button +
+  restart prompt; token scrubbed). Installed via the user-local **`install.sh`** /
+  self-extracting **`.run`** (M9).
   *Original plan:* On launch, check the public Gitea releases API and
   **self-update a user-local install with no root** (download → verify checksum/signature →
   atomic symlink swap → restart, incl. the daemon). HTTPS-only, version-check-only (no

docs/ROADMAP.md

@@ -40,16 +40,17 @@ Ubuntu + NVIDIA first; `.deb` distribution (see `DECISIONS.md`).
       `rigdoctor wrap %command%` + global Steam compat-tool; zero-config watcher
       (Steam RunningAppID + /proc) and GameMode hook follow)
 - [~] M9 interactive installer — *done:* distro/GPU detection + optional-dependency install
-      (`rigdoctor install`, GUI Setup tab). *Pending:* module-selection config + `systemd --user`
-      service enable + trigger-mode pick.
+      (`rigdoctor install`, GUI Setup tab); **user-local `install.sh` + self-extracting `.run`**
+      (no-root venv install, handles python3-venv prereq, CI-built). *Pending:* module-selection
+      config + `systemd --user` service enable + trigger-mode pick.
 - [ ] `.deb` packaging (D8) declaring per-bundle deps incl. python3-pyside6 for Desktop UI
 
 ## Phase 5 — Breadth (later)
 - [ ] AMD GPU support in M1 (Steam Deck / Radeon)
 - [ ] Intel GPU best-effort
-- [~] M13 auto-update (D18) — *done:* launch-time version check shown in the GUI sidebar
-      (up-to-date / "Update to v…" / unavailable). *Pending:* no-root self-update of the
-      user-local install from the public Gitea releases; `rigdoctor update`.
+- [x] M13 auto-update (D18) — launch-time version check (GUI sidebar) + no-root self-update
+      apply (`rigdoctor update` / sidebar button → authenticated pip upgrade), token-gated.
+      Restart-after-update is manual for now.
 - [ ] (Later, separate milestone) Optional auto-apply of suggested fixes behind explicit
       consent — currently out of scope (D9)
 
@@ -57,10 +58,10 @@ Ubuntu + NVIDIA first; `.deb` distribution (see `DECISIONS.md`).
 Escalating ladder, built in order:
 - [ ] Tier 1: `share export` — diagnostic bundle (inventory + recent log + report); B opens
       it in RigDoctor. One-way, safest.
-- [ ] Tier 2: live read-only view (local server + user-chosen tunnel: Tailscale/cloudflared/
-      SSH; no hosted relay), token-gated, A approves, revocable.
-- [ ] Tier 3: gated interactive terminal (wrap tmate/sshx; read-only default, read-write on
-      explicit consent), with session audit log.
+- [x] Tier 2: live read-only view — `rigdoctor share serve` (stdlib HTTP, token-gated:
+      sensors + health + inventory). Remote = user-chosen tunnel; GUI controls still to add.
+- [x] Tier 3: host-consented interactive terminal — a real PTY shell shared over the relay
+      (own `pty`, pyte-rendered guest), off by default; host reads along + can type (sudo).
 
 > **Out of scope:** stress/repro module (D7); multi-distro support and packaging beyond
 > Ubuntu/apt + `.deb` (D15) — a thin seam is kept but not built out.

install.sh

@@ -0,0 +1,117 @@
+#!/usr/bin/env sh
+# RigDoctor user-local installer (no root). Creates a private venv, links the
+# `rigdoctor` / `rigdoctor-gui` commands into ~/.local/bin, and adds a desktop
+# entry. Installs from a bundled wheel (the .run installer) or from a source
+# checkout. Re-run to upgrade; `./install.sh --uninstall` to remove.
+set -eu
+
+APP_NAME=rigdoctor
+DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"
+VENV="$DATA_HOME/$APP_NAME/venv"
+BIN_DIR="$HOME/.local/bin"
+DESKTOP_DIR="$DATA_HOME/applications"
+DESKTOP_FILE="$DESKTOP_DIR/rigdoctor.desktop"
+SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+
+uninstall() {
+    echo "Removing RigDoctor user-local install…"
+    rm -rf "$VENV"
+    rm -f "$BIN_DIR/rigdoctor" "$BIN_DIR/rigdoctor-gui" "$DESKTOP_FILE" \
+          "$DATA_HOME/icons/hicolor/scalable/apps/rigdoctor.svg"
+    echo "Done. (Config and logs under ~/.config/rigdoctor and ~/.local/share/rigdoctor were kept.)"
+}
+
+REF=""
+while [ $# -gt 0 ]; do
+    case "$1" in
+        --uninstall) uninstall; exit 0 ;;
+        --ref) REF="${2:-}"; [ -n "$REF" ] || { echo "--ref needs a tag"; exit 1; }; shift 2 ;;
+        -h|--help) echo "Usage: install.sh [--ref <tag>] [--uninstall]"; exit 0 ;;
+        *) echo "Unknown option: $1"; exit 1 ;;
+    esac
+done
+
+PY=python3
+command -v "$PY" >/dev/null 2>&1 || { echo "python3 not found — install Python 3.11+."; exit 1; }
+"$PY" - <<'EOF' || { echo "Python 3.11+ is required."; exit 1; }
+import sys
+sys.exit(0 if sys.version_info >= (3, 11) else 1)
+EOF
+
+# venv support (ensurepip) is required; install python3-venv if it's missing.
+if ! "$PY" -c "import ensurepip" >/dev/null 2>&1; then
+    PYVER=$("$PY" -c "import sys; print(f'{sys.version_info.major}.{sys.version_info.minor}')")
+    PKGS="python3-venv python${PYVER}-venv"
+    echo "Python venv support is missing — needs: $PKGS"
+    if command -v pkexec >/dev/null 2>&1; then ESC=pkexec
+    elif command -v sudo >/dev/null 2>&1; then ESC=sudo
+    else ESC=""; fi
+    if [ -n "$ESC" ] && command -v apt-get >/dev/null 2>&1; then
+        echo "Installing $PKGS (you may be prompted for your password)…"
+        "$ESC" sh -c "apt-get update && apt-get install -y $PKGS" \
+            || { echo "Failed. Install manually: sudo apt install $PKGS"; exit 1; }
+    else
+        echo "Install it manually, then re-run: sudo apt install $PKGS"
+        exit 1
+    fi
+fi
+
+# Where to install from: a specific released tag (--ref), a bundled wheel, or source.
+WHEEL=$(ls "$SCRIPT_DIR"/rigdoctor-*.whl 2>/dev/null | head -n1 || true)
+if [ -n "$REF" ]; then
+    CONF="${XDG_CONFIG_HOME:-$HOME/.config}/rigdoctor/token"
+    TOKEN="${RIGDOCTOR_TOKEN:-$(cat "$CONF" 2>/dev/null || true)}"
+    [ -n "$TOKEN" ] || { echo "--ref needs a token (run 'rigdoctor login' or set RIGDOCTOR_TOKEN)."; exit 1; }
+    SRC="rigdoctor[gui] @ git+https://oauth2:$TOKEN@git.jesseyvanofferen.com/jessey/rigdoctor.git@$REF"
+elif [ -n "$WHEEL" ]; then
+    SRC="$WHEEL[gui]"
+elif [ -f "$SCRIPT_DIR/pyproject.toml" ]; then
+    SRC="$SCRIPT_DIR[gui]"
+else
+    echo "No bundled wheel or source found next to the installer."
+    exit 1
+fi
+
+echo "Creating venv at $VENV…"
+"$PY" -m venv "$VENV"
+"$VENV/bin/pip" install --upgrade pip >/dev/null
+echo "Installing RigDoctor (pulls in PySide6 — this can take a minute)…"
+"$VENV/bin/pip" install "$SRC"
+
+mkdir -p "$BIN_DIR"
+ln -sf "$VENV/bin/rigdoctor" "$BIN_DIR/rigdoctor"
+ln -sf "$VENV/bin/rigdoctor-gui" "$BIN_DIR/rigdoctor-gui"
+
+# Install the app icon (for the dock/launcher); fall back to a stock icon.
+ICON_NAME=utilities-system-monitor
+ICON_SRC=$("$VENV/bin/python" -c "import os, rigdoctor.gui as g; print(os.path.join(os.path.dirname(g.__file__), 'assets', 'rigdoctor.svg'))" 2>/dev/null || true)
+if [ -n "$ICON_SRC" ] && [ -f "$ICON_SRC" ]; then
+    ICON_DST="$DATA_HOME/icons/hicolor/scalable/apps/rigdoctor.svg"
+    mkdir -p "$(dirname "$ICON_DST")"
+    cp "$ICON_SRC" "$ICON_DST"
+    ICON_NAME=rigdoctor
+    command -v gtk-update-icon-cache >/dev/null 2>&1 && gtk-update-icon-cache -qtf "$DATA_HOME/icons/hicolor" 2>/dev/null || true
+fi
+
+mkdir -p "$DESKTOP_DIR"
+cat > "$DESKTOP_FILE" <<EOF
+[Desktop Entry]
+Type=Application
+Name=RigDoctor
+Comment=Hardware monitoring & crash diagnostics for Linux gamers
+Exec=$VENV/bin/rigdoctor-gui
+Icon=$ICON_NAME
+Terminal=false
+Categories=System;Monitor;Utility;
+StartupWMClass=rigdoctor
+EOF
+command -v update-desktop-database >/dev/null 2>&1 && update-desktop-database "$DESKTOP_DIR" 2>/dev/null || true
+
+echo
+echo "RigDoctor $("$VENV/bin/rigdoctor" --version 2>/dev/null | awk '{print $2}') installed."
+echo "  GUI:  rigdoctor-gui   (or find 'RigDoctor' in your app menu)"
+echo "  CLI:  rigdoctor --help"
+case ":$PATH:" in
+    *":$BIN_DIR:"*) ;;
+    *) echo "  Note: add $BIN_DIR to your PATH (a fresh login usually does this).";;
+esac

packaging/bump.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env sh
+# Auto-set the next version from Conventional Commits (git-cliff), per D21.
+# Run after committing your feat:/fix: changes; it updates __init__.py + pyproject.toml.
+# Then update CHANGELOG.md, commit as `chore(release): vX.Y.Z`, and push (CI tags + releases).
+set -eu
+
+ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+cd "$ROOT"
+
+command -v git-cliff >/dev/null 2>&1 || { echo "git-cliff not found. Install: pip install git-cliff"; exit 1; }
+
+NEXT=$(git-cliff --bumped-version | sed 's/^v//')
+[ -n "$NEXT" ] || { echo "Could not compute the next version."; exit 1; }
+
+python3 - "$NEXT" <<'PY'
+import pathlib, re, sys
+version = sys.argv[1]
+init = pathlib.Path("src/rigdoctor/__init__.py")
+init.write_text(re.sub(r'__version__ = "[^"]+"', f'__version__ = "{version}"', init.read_text()))
+proj = pathlib.Path("pyproject.toml")
+proj.write_text(re.sub(r'(?m)^version = "[^"]+"', f'version = "{version}"', proj.read_text(), count=1))
+PY
+
+echo "Set version to $NEXT."
+echo "Next: add a '## [$NEXT]' CHANGELOG section, then commit as 'chore(release): v$NEXT'."

packaging/changelog.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env sh
+# Regenerate CHANGELOG.md from Conventional Commits using git-cliff (D20).
+# Install once:  pip install git-cliff   (ships prebuilt binaries)
+# Usage:         packaging/changelog.sh [--tag vX.Y.Z]
+set -eu
+
+ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+cd "$ROOT"
+
+command -v git-cliff >/dev/null 2>&1 || {
+    echo "git-cliff not found. Install it: pip install git-cliff"
+    exit 1
+}
+
+if [ "${1:-}" = "--tag" ] && [ -n "${2:-}" ]; then
+    git-cliff --tag "$2" -o CHANGELOG.md
+else
+    git-cliff -o CHANGELOG.md
+fi
+echo "Wrote CHANGELOG.md"

packaging/make-run.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+# Build the self-extracting .run installer (delegates to make_run.py — no makeself).
+exec python3 "$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)/make_run.py" "$@"

packaging/make_run.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""Build a dependency-free self-extracting .run installer (no makeself).
+
+Produces dist/rigdoctor-<version>-installer.run: a POSIX shell stub with an appended
+tar.gz of the wheel + install.sh. Running it extracts to a temp dir and runs install.sh.
+"""
+
+from __future__ import annotations
+
+import io
+import os
+import subprocess
+import sys
+import tarfile
+import tomllib
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent.parent
+MARKER = "__RIGDOCTOR_ARCHIVE__"
+
+STUB = f"""#!/bin/sh
+# RigDoctor self-extracting installer. Extracts the embedded archive and runs install.sh.
+set -eu
+SKIP=$(awk '/^{MARKER}$/ {{ print NR + 1; exit 0 }}' "$0")
+TMP=$(mktemp -d)
+tail -n +"$SKIP" "$0" | tar -xz -C "$TMP"
+sh "$TMP/install.sh" "$@"
+RET=$?
+rm -rf "$TMP"
+exit $RET
+{MARKER}
+"""
+
+
+def main() -> int:
+    version = tomllib.loads((ROOT / "pyproject.toml").read_text())["project"]["version"]
+    dist = ROOT / "dist"
+    dist.mkdir(exist_ok=True)
+
+    wheel = dist / f"rigdoctor-{version}-py3-none-any.whl"
+    if not wheel.exists():
+        subprocess.run([sys.executable, "-m", "build", "--wheel"], cwd=ROOT, check=True)
+    if not wheel.exists():
+        print(f"wheel not found: {wheel}", file=sys.stderr)
+        return 1
+
+    buf = io.BytesIO()
+    with tarfile.open(fileobj=buf, mode="w:gz") as tar:
+        tar.add(wheel, arcname=wheel.name)
+        tar.add(ROOT / "install.sh", arcname="install.sh")
+
+    out = dist / f"rigdoctor-{version}-installer.run"
+    with open(out, "wb") as f:
+        f.write(STUB.encode())
+        f.write(buf.getvalue())
+    os.chmod(out, 0o755)
+    print(f"Built {out}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "rigdoctor"
-version = "0.0.5"
+version = "0.7.3"
 description = "Modular hardware monitoring & crash diagnostics for Linux gamers."
 readme = "README.md"
 requires-python = ">=3.11"
@@ -13,7 +13,7 @@ requires-python = ">=3.11"
 dependencies = []
 
 [project.optional-dependencies]
-gui = ["PySide6"]
+gui = ["PySide6", "pyte"]
 
 [project.scripts]
 rigdoctor = "rigdoctor.cli:main"
@@ -21,3 +21,6 @@ rigdoctor-gui = "rigdoctor.gui.app:main"
 
 [tool.setuptools.packages.find]
 where = ["src"]
+
+[tool.setuptools.package-data]
+rigdoctor = ["gui/assets/*.svg"]

src/rigdoctor/__init__.py

@@ -1,3 +1,3 @@
 """RigDoctor — modular hardware monitoring & crash diagnostics for Linux gamers."""
 
-__version__ = "0.0.5"
+__version__ = "0.7.3"

src/rigdoctor/cli.py

@@ -212,6 +212,125 @@ def cmd_install(args) -> int:
     return rc
 
 
+def cmd_login(args) -> int:
+    from getpass import getpass
+
+    from .core import updates
+
+    token = args.token
+    if not token:
+        print(f"Create a token (scope read:repository) at: {updates.TOKEN_PAGE}")
+        try:
+            token = getpass("Paste token: ").strip()
+        except (EOFError, KeyboardInterrupt):
+            token = ""
+    if not token:
+        print("No token provided.")
+        return 1
+    config.save_token(token)
+    state, tag, _notes = updates.update_state()
+    if state == updates.AUTH:
+        print("Token saved, but the server rejected it (check scope/permissions).")
+        return 1
+    if state in (updates.UP_TO_DATE, updates.AVAILABLE):
+        print(f"Token saved and verified. Latest release: {tag}.")
+        return 0
+    print("Token saved (couldn't reach the server to verify right now).")
+    return 0
+
+
+def cmd_logout(args) -> int:
+    config.clear_token()
+    print("Update token removed.")
+    return 0
+
+
+def cmd_update(args) -> int:
+    from .core import updates
+
+    state, tag, notes = updates.update_state()
+    if state == updates.NO_TOKEN:
+        print("No update token. Run `rigdoctor login` after creating one at:")
+        print(f"  {updates.TOKEN_PAGE}")
+        return 1
+    if state == updates.AUTH:
+        print("The update server rejected your token (check scope/permissions).")
+        return 1
+    if state == updates.NETWORK:
+        print("Couldn't reach the update server.")
+        return 1
+    if state == updates.UP_TO_DATE:
+        print(f"Up to date (v{__version__}).")
+        return 0
+    # AVAILABLE
+    print(f"Update available: {tag}  (current v{__version__}).")
+    if notes:
+        print("\nWhat's new:\n" + "\n".join("  " + ln for ln in notes.splitlines()) + "\n")
+    if args.check:
+        return 0
+    print(f"Installing {tag}…")
+    rc, out = updates.apply_update(tag)
+    print(out[-2000:])
+    if rc == 0:
+        print(f"\nUpdated to {tag}. Restart RigDoctor to use the new version.")
+        return 0
+    print(f"\nUpdate failed (exit {rc}).")
+    return rc
+
+
+def cmd_uninstall(args) -> int:
+    from .core import uninstall as uninstaller
+
+    scope = "everything (app + settings, token, and logs)" if args.purge else "the app (settings/logs kept)"
+    if not args.yes:
+        try:
+            reply = input(f"Uninstall RigDoctor — remove {scope}? [y/N] ").strip().lower()
+        except EOFError:
+            reply = "n"
+        if reply not in ("y", "yes"):
+            print("Aborted.")
+            return 1
+    uninstaller.uninstall(purge=args.purge)
+    print("Uninstalling… RigDoctor will be removed momentarily.")
+    return 0
+
+
+def cmd_share_serve(args) -> int:
+    from .core import share
+
+    return share.serve(host=args.host, port=args.port)
+
+
+def cmd_collect_priv(args) -> int:
+    """Internal: emit root-only data (SMART + dmidecode) as JSON, run via pkexec at launch."""
+    from dataclasses import asdict
+
+    from .core.health import check_smart
+    from .core.inventory import _dmidecode
+
+    data = {"smart": [asdict(f) for f in check_smart()], "dmidecode": _dmidecode()}
+    print(json.dumps(data))
+    return 0
+
+
+def cmd_inventory(args) -> int:
+    from .core import inventory
+
+    sections = inventory.collect()
+    if args.json:
+        text = inventory.render_json(sections)
+    elif args.markdown:
+        text = inventory.render_markdown(sections)
+    else:
+        text = inventory.render_text(sections)
+    if args.output:
+        Path(args.output).write_text(text)
+        print(f"Wrote {args.output}")
+    else:
+        print(text)
+    return 0
+
+
 def cmd_report(args) -> int:
     from dataclasses import asdict
 
@@ -250,6 +369,20 @@ def build_parser() -> argparse.ArgumentParser:
     inst.add_argument("-y", "--yes", action="store_true", help="install without confirmation")
     inst.set_defaults(func=cmd_install)
 
+    login = sub.add_parser("login", help="save a Gitea token for updates (M13)")
+    login.add_argument("--token", default=None, help="token (prompted if omitted)")
+    login.set_defaults(func=cmd_login)
+    sub.add_parser("logout", help="remove the saved update token").set_defaults(func=cmd_logout)
+
+    upd = sub.add_parser("update", help="check for / apply a newer version (M13)")
+    upd.add_argument("--check", action="store_true", help="only report, don't apply")
+    upd.set_defaults(func=cmd_update)
+
+    unin = sub.add_parser("uninstall", help="remove the user-local install")
+    unin.add_argument("--purge", action="store_true", help="also remove settings, token, and logs")
+    unin.add_argument("-y", "--yes", action="store_true", help="don't ask for confirmation")
+    unin.set_defaults(func=cmd_uninstall)
+
     rec = sub.add_parser("record", help="crash-capture logger (M3)")
     rec_sub = rec.add_subparsers(dest="record_cmd", required=True)
 
@@ -274,6 +407,22 @@ def build_parser() -> argparse.ArgumentParser:
     rep = sub.add_parser("report", help="health report (M4): scan logs/SMART/driver for issues")
     rep.add_argument("--json", action="store_true", help="output JSON instead of text")
     rep.set_defaults(func=cmd_report)
+
+    cp = sub.add_parser("collect-priv", help=argparse.SUPPRESS)  # internal: run via pkexec
+    cp.set_defaults(func=cmd_collect_priv)
+
+    share_p = sub.add_parser("share", help="session sharing (M12)")
+    share_sub = share_p.add_subparsers(dest="share_cmd", required=True)
+    serve_p = share_sub.add_parser("serve", help="serve a read-only live view (token-gated)")
+    serve_p.add_argument("--host", default="127.0.0.1", help="bind address (use 0.0.0.0 + a tunnel for remote)")
+    serve_p.add_argument("--port", type=int, default=8765, help="port")
+    serve_p.set_defaults(func=cmd_share_serve)
+
+    inv = sub.add_parser("inventory", help="system inventory (M5): export hardware/OS details")
+    inv.add_argument("--json", action="store_true", help="output JSON")
+    inv.add_argument("--markdown", action="store_true", help="output Markdown (for forum/bug reports)")
+    inv.add_argument("-o", "--output", default=None, help="write to a file instead of stdout")
+    inv.set_defaults(func=cmd_inventory)
     return p
 
 

src/rigdoctor/config.py

@@ -3,6 +3,8 @@
 from __future__ import annotations
 
 import os
+import shutil
+import subprocess
 from pathlib import Path
 
 APP = "rigdoctor"
@@ -25,10 +27,122 @@ STATUS_FILE = STATE_DIR / "recorder.json"
 PID_FILE = STATE_DIR / "recorder.pid"
 SPAWN_LOG = STATE_DIR / "recorder.out"
 
+# Update access token (M13) — gates updates to Gitea account holders (D18).
+# Stored in the OS keyring (Secret Service / GNOME Keyring) via `secret-tool` when
+# available — encrypted at rest, unlocked with the login session — else a 0600 file.
+TOKEN_FILE = CONFIG_DIR / "token"
+_SECRET_ATTRS = ["application", "rigdoctor", "type", "update-token"]
+
+
+def _secret_tool() -> str | None:
+    return shutil.which("secret-tool")
+
+
+def keyring_available() -> bool:
+    """True if an encrypted OS keyring (secret-tool) is usable."""
+    return _secret_tool() is not None
+
+
+def _keyring_store(token: str) -> bool:
+    tool = _secret_tool()
+    if not tool:
+        return False
+    try:
+        proc = subprocess.run(
+            [tool, "store", "--label", "RigDoctor update token", *_SECRET_ATTRS],
+            input=token, text=True, capture_output=True, timeout=20,
+        )
+        return proc.returncode == 0
+    except (subprocess.SubprocessError, OSError):
+        return False
+
+
+def _keyring_lookup() -> str | None:
+    tool = _secret_tool()
+    if not tool:
+        return None
+    try:
+        proc = subprocess.run(
+            [tool, "lookup", *_SECRET_ATTRS], text=True, capture_output=True, timeout=20
+        )
+        if proc.returncode == 0 and proc.stdout.strip():
+            return proc.stdout.strip()
+    except (subprocess.SubprocessError, OSError):
+        pass
+    return None
+
+
+def _keyring_clear() -> None:
+    tool = _secret_tool()
+    if not tool:
+        return
+    try:
+        subprocess.run([tool, "clear", *_SECRET_ATTRS], capture_output=True, timeout=20)
+    except (subprocess.SubprocessError, OSError):
+        pass
+
+
+def load_token() -> str | None:
+    """Token from $RIGDOCTOR_TOKEN, then the OS keyring, then a 0600 file."""
+    env = os.environ.get("RIGDOCTOR_TOKEN")
+    if env and env.strip():
+        return env.strip()
+    from_keyring = _keyring_lookup()
+    if from_keyring:
+        return from_keyring
+    try:
+        token = TOKEN_FILE.read_text().strip()
+        return token or None
+    except OSError:
+        return None
+
+
+def save_token(token: str) -> None:
+    """Save to the OS keyring if possible (encrypted); else a 0600 file."""
+    token = token.strip()
+    if _keyring_store(token):
+        try:  # don't leave a plaintext copy once it's in the keyring
+            TOKEN_FILE.unlink()
+        except OSError:
+            pass
+        return
+    CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+    TOKEN_FILE.write_text(token + "\n")
+    try:
+        TOKEN_FILE.chmod(0o600)
+    except OSError:
+        pass
+
+
+def clear_token() -> None:
+    _keyring_clear()
+    try:
+        TOKEN_FILE.unlink()
+    except OSError:
+        pass
+
+
+def token_backend() -> str:
+    """Where the active token lives: 'env' | 'keyring' | 'file' | 'none'."""
+    env = os.environ.get("RIGDOCTOR_TOKEN")
+    if env and env.strip():
+        return "env"
+    if _keyring_lookup() is not None:
+        return "keyring"
+    if TOKEN_FILE.exists():
+        return "file"
+    return "none"
+
 DEFAULTS: dict = {
     "interval": 1.0,           # sampling interval in seconds (default ≤1 Hz — NFR)
     "log_max_bytes": 20_000_000,  # rotate a log segment past this size
     "log_backups": 10,            # keep this many rotated segments (bounds disk use)
+    "update_check_minutes": 30,   # re-check for updates this often while running (0 = off)
+    "elevate_on_launch": True,    # GUI asks for the password once at launch (SMART/dmidecode)
+    "alerts_enabled": True,       # desktop notifications on overheat / GPU-lost / new version
+    "gpu_temp_alert": 90.0,       # °C — alert when GPU reaches this
+    "cpu_temp_alert": 95.0,       # °C — alert when CPU reaches this
+    "relay_url": "wss://rigdoctor.jesseyvanofferen.com",  # session-sharing relay (M12)
 }
 
 
@@ -44,3 +158,27 @@ def load_config() -> dict:
     except Exception:
         pass
     return cfg
+
+
+def _toml_value(value) -> str:
+    if isinstance(value, bool):
+        return "true" if value else "false"
+    if isinstance(value, (int, float)):
+        return repr(value)
+    return '"' + str(value).replace("\\", "\\\\").replace('"', '\\"') + '"'
+
+
+def save_config(values: dict) -> None:
+    """Write a flat config.toml (stdlib has no TOML writer)."""
+    CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+    lines = ["# RigDoctor config — edit in the app (Notifications) or here."]
+    lines += [f"{key} = {_toml_value(value)}" for key, value in values.items()]
+    CONFIG_FILE.write_text("\n".join(lines) + "\n")
+
+
+def update_config(**changes) -> dict:
+    """Merge changes into the current effective config and persist them."""
+    cfg = load_config()
+    cfg.update(changes)
+    save_config(cfg)
+    return cfg

src/rigdoctor/core/alerts.py

@@ -0,0 +1,91 @@
+"""Desktop alerts (M8): notify on overheat / GPU-lost / new version via notify-send.
+
+Edge-triggered: an alert fires when a condition becomes true (not every sample), and
+can fire again only after it has cleared and a cooldown has passed — so a hot GPU or a
+1-Hz sample loop doesn't spam notifications. Degrades to a no-op if notify-send is absent.
+"""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+import time
+
+from .sample import Sample
+
+APP_NAME = "RigDoctor"
+_ICON = "utilities-system-monitor"
+
+
+def available() -> bool:
+    return shutil.which("notify-send") is not None
+
+
+def notify(title: str, message: str, urgency: str = "normal") -> bool:
+    """Send a desktop notification (best-effort). urgency: low|normal|critical."""
+    if not available():
+        return False
+    try:
+        subprocess.run(
+            ["notify-send", "-a", APP_NAME, "-u", urgency, "-i", _ICON, title, message],
+            timeout=10,
+            check=False,
+        )
+        return True
+    except (subprocess.SubprocessError, OSError):
+        return False
+
+
+class AlertMonitor:
+    """Evaluate samples and raise edge-triggered desktop alerts."""
+
+    def __init__(self, gpu_temp: float = 90.0, cpu_temp: float = 95.0, cooldown: float = 300.0):
+        self.gpu_temp = gpu_temp
+        self.cpu_temp = cpu_temp
+        self.cooldown = cooldown
+        self.enabled = True
+        self._active: dict[str, bool] = {}
+        self._last: dict[str, float] = {}
+
+    def _fire(self, key: str, title: str, message: str, urgency: str = "critical") -> None:
+        if self._active.get(key):
+            return  # already alerting; wait until it clears
+        now = time.time()
+        if now - self._last.get(key, 0.0) < self.cooldown:
+            return
+        self._active[key] = True
+        self._last[key] = now
+        notify(title, message, urgency)
+
+    def _clear(self, key: str) -> None:
+        self._active[key] = False
+
+    def check(self, sample: Sample) -> None:
+        if not self.enabled:
+            return
+        gpu_t = next(
+            (r.value for r in sample.readings
+             if r.source == "gpu" and r.metric == "temp" and r.label == "" and r.value is not None),
+            None,
+        )
+        if gpu_t is not None:
+            if gpu_t >= self.gpu_temp:
+                self._fire("gpu_temp", "GPU overheating", f"GPU at {gpu_t:.0f} °C")
+            else:
+                self._clear("gpu_temp")
+
+        cpu_temps = [r.value for r in sample.readings
+                     if r.source == "cpu" and r.metric == "temp" and r.value is not None]
+        if cpu_temps:
+            cpu_t = max(cpu_temps)
+            if cpu_t >= self.cpu_temp:
+                self._fire("cpu_temp", "CPU overheating", f"CPU at {cpu_t:.0f} °C")
+            else:
+                self._clear("cpu_temp")
+
+        lost = any(r.source == "gpu" and r.metric == "status" and r.label == "query-timeout"
+                   for r in sample.readings)
+        if lost:
+            self._fire("gpu_lost", "GPU not responding", "nvidia-smi query timed out — the GPU may have dropped")
+        else:
+            self._clear("gpu_lost")

src/rigdoctor/core/catalog.py

@@ -23,7 +23,7 @@ class Component:
 COMPONENTS: tuple[Component, ...] = (
     Component(
         "smartmontools", "SMART disk health", "Diagnostics",
-        "Disk health (SMART) in the health report (M4)", ("smartmontools",), "smartctl",
+        "Disk health (SMART) in the health report", ("smartmontools",), "smartctl",
     ),
     Component(
         "lm-sensors", "lm-sensors", "Diagnostics",
@@ -31,7 +31,7 @@ COMPONENTS: tuple[Component, ...] = (
     ),
     Component(
         "dmidecode", "dmidecode", "Diagnostics",
-        "Motherboard / BIOS / RAM details for system inventory (M5)", ("dmidecode",), "dmidecode",
+        "Motherboard / BIOS / RAM details for system inventory", ("dmidecode",), "dmidecode",
     ),
     Component(
         "pciutils", "pciutils", "Diagnostics",
@@ -39,6 +39,10 @@ COMPONENTS: tuple[Component, ...] = (
     ),
     Component(
         "libnotify", "Desktop notifications", "Monitoring",
-        "Desktop alert notifications (M8)", ("libnotify-bin",), "notify-send",
+        "Desktop alert notifications", ("libnotify-bin",), "notify-send",
+    ),
+    Component(
+        "libsecret", "Encrypted token storage", "Updates",
+        "Store the update token in the OS keyring, encrypted", ("libsecret-tools",), "secret-tool",
     ),
 )

src/rigdoctor/core/elevation.py

@@ -0,0 +1,51 @@
+"""Session privilege elevation.
+
+At GUI launch the app asks for the password once (pkexec) and collects the data that
+needs root — SMART health + dmidecode (board/BIOS/RAM) — caching it for the session so
+Health and Inventory can always show the full picture without per-action prompts.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import shutil
+import subprocess
+import sys
+
+_privileged: dict | None = None
+
+
+def privileged() -> dict | None:
+    """Cached root-collected data ({"smart": [...], "dmidecode": {...}}), or None."""
+    return _privileged
+
+
+def set_privileged(data: dict | None) -> None:
+    global _privileged
+    _privileged = data
+
+
+def available() -> bool:
+    return shutil.which("pkexec") is not None and os.geteuid() != 0
+
+
+def _cli() -> list[str]:
+    candidate = os.path.join(os.path.dirname(sys.executable), "rigdoctor")
+    return [candidate] if os.path.exists(candidate) else [sys.executable, "-m", "rigdoctor"]
+
+
+def collect_via_pkexec(timeout: float = 120.0) -> dict | None:
+    """Run one elevated collection (single password prompt). None if unavailable/cancelled."""
+    if not available():
+        return None
+    try:
+        proc = subprocess.run(
+            ["pkexec", *_cli(), "collect-priv"],
+            capture_output=True, text=True, timeout=timeout,
+        )
+        if proc.returncode == 0 and proc.stdout.strip():
+            return json.loads(proc.stdout)
+    except (subprocess.SubprocessError, OSError, ValueError):
+        pass
+    return None

src/rigdoctor/core/health.py

@@ -234,12 +234,22 @@ def check_live_temps() -> list[Finding]:
 
 
 def run_health_checks() -> list[Finding]:
-    """Run all checks and return findings sorted by severity (worst first)."""
+    """Run all checks and return findings sorted by severity (worst first).
+
+    SMART needs root; if the session collected it via launch elevation, use that
+    instead of re-running smartctl (which would just report "needs root").
+    """
+    from . import elevation
+
     findings: list[Finding] = []
     findings += check_nvidia_driver()
     findings += check_journal()
     findings += check_journal_persistence()
-    findings += check_smart()
+    priv = elevation.privileged()
+    if priv is not None and priv.get("smart") is not None:
+        findings += [Finding(**d) for d in priv["smart"]]
+    else:
+        findings += check_smart()
     findings += check_live_temps()
     findings.sort(key=lambda f: _ORDER.get(f.severity, 9))
     return findings

src/rigdoctor/core/inventory.py

@@ -0,0 +1,206 @@
+"""System inventory (M5): collect hardware/OS details, exportable to Markdown/JSON.
+
+Stdlib + tools already used elsewhere (nvidia-smi, lspci, lsblk, dmidecode). Every
+probe degrades gracefully; board/BIOS/RAM-module details need dmidecode as root.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import platform
+import shutil
+import subprocess
+from dataclasses import dataclass
+from pathlib import Path
+
+from .. import __version__
+from . import sysenv
+
+
+@dataclass
+class Section:
+    title: str
+    items: list[tuple[str, str]]
+
+
+def _run(cmd: list[str], timeout: float = 12.0) -> str:
+    try:
+        proc = subprocess.run(cmd, capture_output=True, text=True, timeout=timeout)
+        if proc.returncode == 0:
+            return proc.stdout
+    except (subprocess.SubprocessError, OSError):
+        pass
+    return ""
+
+
+def _system() -> Section:
+    u = os.uname()
+    return Section("System", [
+        ("Distro", sysenv.distro_name()),
+        ("Kernel", u.release),
+        ("Architecture", u.machine),
+        ("Hostname", u.nodename),
+        ("Python", platform.python_version()),
+        ("RigDoctor", __version__),
+    ])
+
+
+def _cpu() -> Section:
+    model = "?"
+    threads = 0
+    core_ids: set[tuple[str, str]] = set()
+    phys = "0"
+    try:
+        for line in Path("/proc/cpuinfo").read_text().splitlines():
+            if line.startswith("model name") and model == "?":
+                model = line.split(":", 1)[1].strip()
+            elif line.startswith("processor"):
+                threads += 1
+            elif line.startswith("physical id"):
+                phys = line.split(":", 1)[1].strip()
+            elif line.startswith("core id"):
+                core_ids.add((phys, line.split(":", 1)[1].strip()))
+    except OSError:
+        pass
+    items = [("Model", model)]
+    if core_ids:
+        items.append(("Cores", str(len(core_ids))))
+    items.append(("Threads", str(threads or os.cpu_count() or "?")))
+    return Section("CPU", items)
+
+
+def _firmware(dmi: dict) -> Section:
+    board = dmi.get("baseboard", {})
+    bios = dmi.get("bios", {})
+    items: list[tuple[str, str]] = []
+    if board:
+        items.append(("Motherboard", f"{board.get('Manufacturer', '')} {board.get('Product Name', '')}".strip()))
+    if bios:
+        items.append(("BIOS", f"{bios.get('Vendor', '')} {bios.get('Version', '')}".strip()))
+        if bios.get("Release Date"):
+            items.append(("BIOS date", bios["Release Date"]))
+    if not items:
+        items = [("Motherboard / BIOS", "run with admin (dmidecode needs root)")]
+    return Section("Firmware", items)
+
+
+def _memory(dmi: dict) -> Section:
+    items: list[tuple[str, str]] = []
+    try:
+        for line in Path("/proc/meminfo").read_text().splitlines():
+            if line.startswith("MemTotal"):
+                items.append(("Total", f"{int(line.split()[1]) / 1024 / 1024:.1f} GB"))
+                break
+    except (OSError, ValueError, IndexError):
+        pass
+    modules = dmi.get("memory", [])
+    if modules:
+        items.append(("Modules", str(len(modules))))
+        for i, m in enumerate(modules):
+            desc = " · ".join(p for p in (m.get("Size"), m.get("Type"), m.get("Speed"), m.get("Part Number")) if p)
+            items.append((f"Slot {i}", desc))
+    elif shutil.which("dmidecode"):
+        items.append(("Modules", "run with admin for module details"))
+    return Section("Memory", items)
+
+
+def _gpu() -> Section:
+    if shutil.which("nvidia-smi"):
+        out = _run([
+            "nvidia-smi",
+            "--query-gpu=name,driver_version,vbios_version,memory.total,pcie.link.gen.max,pcie.link.width.max",
+            "--format=csv,noheader",
+        ])
+        line = out.strip().splitlines()[0] if out.strip() else ""
+        if line:
+            cols = [c.strip() for c in line.split(",")]
+            keys = ["Name", "Driver", "VBIOS", "VRAM", "PCIe gen (max)", "PCIe width (max)"]
+            return Section("GPU", list(zip(keys, cols)))
+    out = _run(["lspci"])
+    gpus = [ln.split(":", 2)[-1].strip() for ln in out.splitlines()
+            if "VGA compatible controller" in ln or "3D controller" in ln]
+    return Section("GPU", [("Device", g) for g in gpus] or [("Device", "unknown")])
+
+
+def _storage() -> Section:
+    items: list[tuple[str, str]] = []
+    # TYPE first so MODEL (which can contain spaces) is the trailing field.
+    out = _run(["lsblk", "-dn", "-o", "TYPE,NAME,SIZE,MODEL"])
+    for line in out.strip().splitlines():
+        parts = line.split(None, 3)
+        if len(parts) < 3 or parts[0] != "disk":  # skip loop/zram/rom devices
+            continue
+        name, size = parts[1], parts[2]
+        model = parts[3] if len(parts) > 3 else ""
+        items.append((name, f"{model} ({size})".strip()))
+    return Section("Storage", items or [("Disks", "unknown")])
+
+
+def _display() -> Section:
+    return Section("Display", [
+        ("Session", os.environ.get("XDG_SESSION_TYPE", "unknown")),
+        ("Desktop", os.environ.get("XDG_CURRENT_DESKTOP") or os.environ.get("DESKTOP_SESSION", "unknown")),
+    ])
+
+
+def _dmidecode() -> dict:
+    if not shutil.which("dmidecode"):
+        return {}
+    out = _run(["dmidecode", "-t", "baseboard", "-t", "bios", "-t", "memory"], timeout=15)
+    if not out.strip():
+        return {}
+    result: dict = {"baseboard": {}, "bios": {}, "memory": []}
+    for block in out.split("Handle "):
+        lines = block.splitlines()
+        if len(lines) < 2:
+            continue
+        title = lines[1].strip()
+        kv: dict[str, str] = {}
+        for ln in lines[2:]:
+            if ln.startswith("\t") and ":" in ln:
+                key, _, value = ln.strip().partition(":")
+                kv[key.strip()] = value.strip()
+        if title == "Base Board Information":
+            result["baseboard"] = kv
+        elif title == "BIOS Information":
+            result["bios"] = kv
+        elif title == "Memory Device" and kv.get("Size") and kv["Size"] != "No Module Installed":
+            result["memory"].append(kv)
+    return result
+
+
+def collect() -> list[Section]:
+    from . import elevation
+
+    priv = elevation.privileged()
+    dmi = priv["dmidecode"] if (priv and priv.get("dmidecode") is not None) else _dmidecode()
+    return [_system(), _cpu(), _firmware(dmi), _memory(dmi), _gpu(), _storage(), _display()]
+
+
+def to_dict(sections: list[Section]) -> dict:
+    return {s.title: dict(s.items) for s in sections}
+
+
+def from_dict(data: dict) -> list[Section]:
+    return [Section(title, list(items.items())) for title, items in data.items()]
+
+
+def render_markdown(sections: list[Section]) -> str:
+    out = ["# RigDoctor system inventory", ""]
+    for s in sections:
+        out.append(f"## {s.title}")
+        out += [f"- **{k}:** {v}" for k, v in s.items]
+        out.append("")
+    return "\n".join(out).strip() + "\n"
+
+
+def render_text(sections: list[Section]) -> str:
+    blocks = []
+    for s in sections:
+        blocks.append("\n".join([s.title] + [f"  {k:<18} {v}" for k, v in s.items]))
+    return "\n\n".join(blocks)
+
+
+def render_json(sections: list[Section]) -> str:
+    return json.dumps(to_dict(sections), indent=2, ensure_ascii=False)

src/rigdoctor/core/pty_session.py

@@ -0,0 +1,59 @@
+"""A pseudo-terminal running the host's shell (M12, Tier 3 — host side).
+
+Spawns the user's login shell in a real PTY so interactive programs work over a shared
+session: vim, top, tab-completion, colours, Ctrl-C, and `sudo` (which prompts inside the
+PTY — the host types that password locally, so it's never sent to the guest). Runs as the
+host's own user — never elevated. Linux-only (uses `pty`/`termios`).
+"""
+
+from __future__ import annotations
+
+import fcntl
+import os
+import pty
+import signal
+import struct
+import termios
+
+
+class PtySession:
+    def __init__(self, rows: int = 24, cols: int = 80):
+        self.pid, self.master_fd = pty.fork()
+        if self.pid == 0:  # child: become the shell
+            os.environ["TERM"] = "xterm-256color"
+            shell = os.environ.get("SHELL", "/bin/bash")
+            try:
+                os.execvp(shell, [shell])
+            finally:
+                os._exit(1)
+        os.set_blocking(self.master_fd, False)
+        self.set_size(rows, cols)
+
+    def set_size(self, rows: int, cols: int) -> None:
+        try:
+            fcntl.ioctl(self.master_fd, termios.TIOCSWINSZ, struct.pack("HHHH", rows, cols, 0, 0))
+        except OSError:
+            pass
+
+    def write(self, data: bytes) -> None:
+        try:
+            os.write(self.master_fd, data)
+        except OSError:
+            pass
+
+    def read(self, size: int = 65536) -> bytes:
+        try:
+            return os.read(self.master_fd, size)
+        except (BlockingIOError, OSError):
+            return b""
+
+    def close(self) -> None:
+        try:
+            os.close(self.master_fd)
+        except OSError:
+            pass
+        try:
+            os.kill(self.pid, signal.SIGHUP)
+            os.waitpid(self.pid, os.WNOHANG)
+        except (OSError, ChildProcessError, ProcessLookupError):
+            pass

src/rigdoctor/core/share.py

@@ -0,0 +1,194 @@
+"""Session sharing (M12, Tier 2): a read-only live view over a local HTTP server.
+
+Serves the live sensor snapshot + health report + inventory, **read-only**, gated by a
+random share token. Bind to localhost for local testing, or to all interfaces behind a
+user-chosen tunnel (Tailscale / cloudflared / SSH) for remote help. No actions, no terminal.
+"""
+
+from __future__ import annotations
+
+import json
+import secrets
+from dataclasses import asdict
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
+from urllib.parse import parse_qs, urlparse
+
+from .sampler import Sampler
+from .sources import available_sources
+
+_PAGE = """<!doctype html>
+<html><head><meta charset="utf-8"><title>RigDoctor — shared</title>
+<style>
+ body{background:#101216;color:#e6e8eb;font-family:system-ui,sans-serif;margin:0;padding:24px}
+ h1{font-size:20px;margin:0 0 4px} h2{font-size:14px;color:#8b929c;margin:18px 0 6px}
+ .card{background:#1b1f26;border:1px solid #2a2f39;border-radius:12px;padding:16px;margin:14px 0}
+ table{width:100%;border-collapse:collapse} td{padding:3px 0;font-size:14px}
+ td.v{text-align:right;font-weight:600} .muted{color:#8b929c}
+ .critical{color:#f87171} .warning{color:#fb923c} .ok{color:#4ade80} .info{color:#8b929c}
+ .badge{display:inline-block;background:#38bdf8;color:#06222e;border-radius:6px;padding:1px 8px;font-size:12px;font-weight:700}
+</style></head><body>
+ <h1>RigDoctor <span class="badge">read-only share</span></h1>
+ <p class="muted">A live view shared by the machine's owner. You can look, not change anything.</p>
+ <div class="card"><div id="live">loading…</div></div>
+ <div class="card"><h2 style="margin-top:0">Health</h2><div id="health">loading…</div></div>
+ <div class="card"><h2 style="margin-top:0">Inventory</h2><div id="inv">loading…</div></div>
+<script>
+ const T=new URLSearchParams(location.search).get('t');
+ const j=async p=>(await fetch(p+'?t='+encodeURIComponent(T))).json();
+ const fmt=(v,u)=>v==null?'N/A':(u==='\\u00b0C'?(+v).toFixed(1)+' °C':(u?v+' '+u:v));
+ async function live(){try{const d=await j('/api/snapshot');let h='';
+  for(const[g,items]of Object.entries(d.groups)){h+='<h2>'+g.toUpperCase()+'</h2><table>';
+   for(const it of items)h+='<tr><td class="muted">'+it.name+'</td><td class="v">'+fmt(it.value,it.unit)+'</td></tr>';
+   h+='</table>';}document.getElementById('live').innerHTML=h;}catch(e){}}
+ async function once(){try{const r=await j('/api/report');
+   document.getElementById('health').innerHTML=r.map(f=>'<div><span class="'+f.severity+'">['+f.severity.toUpperCase()+']</span> '+f.category+': '+f.title+'</div>').join('')||'no findings';}catch(e){}
+  try{const inv=await j('/api/inventory');let h='';
+   for(const[s,kv]of Object.entries(inv)){h+='<h2>'+s+'</h2><table>';
+    for(const[k,v]of Object.entries(kv))h+='<tr><td class="muted">'+k+'</td><td class="v">'+v+'</td></tr>';
+    h+='</table>';}document.getElementById('inv').innerHTML=h;}catch(e){}}
+ live();once();setInterval(live,2000);
+</script></body></html>"""
+
+
+def _snapshot(sampler: Sampler) -> dict:
+    sample = sampler.sample()
+    groups: dict[str, list] = {}
+    for r in sample.readings:
+        if r.metric == "name":
+            item = {"name": "device", "value": r.label, "unit": ""}
+        else:
+            item = {"name": (r.label + " " + r.metric).strip() if r.label else r.metric,
+                    "value": r.value, "unit": r.unit}
+        groups.setdefault(r.source, []).append(item)
+    return {"ts": sample.ts, "groups": groups}
+
+
+def _report() -> list:
+    from .health import run_health_checks
+    return [asdict(f) for f in run_health_checks()]
+
+
+def _inventory() -> dict:
+    from .inventory import collect, to_dict
+    return to_dict(collect())
+
+
+# --- Relay (M12) frames: a host streams these; a guest renders them. -----------------
+
+def host_full_frame(sampler: Sampler) -> str:
+    """Initial frame: live snapshot + health report + inventory."""
+    return json.dumps({"type": "full", "snapshot": _snapshot(sampler),
+                       "report": _report(), "inventory": _inventory()})
+
+
+def host_snapshot_frame(sampler: Sampler) -> str:
+    """Recurring frame: just the live snapshot."""
+    return json.dumps({"type": "snapshot", "snapshot": _snapshot(sampler)})
+
+
+def _fmt(value, unit: str) -> str:
+    if value is None:
+        return "N/A"
+    if unit == "°C":
+        try:
+            return f"{float(value):.1f} °C"
+        except (TypeError, ValueError):
+            return str(value)
+    return f"{value} {unit}".strip()
+
+
+def guest_html(snapshot: dict | None, report: list | None, inventory: dict | None) -> str:
+    """Render a received frame as read-only dark HTML for the guest's view."""
+    import html as _html
+
+    def esc(x) -> str:
+        return _html.escape(str(x))
+
+    out = ['<div style="font-family:sans-serif;color:#e6e8eb">']
+    if snapshot:
+        for group, items in snapshot.get("groups", {}).items():
+            out.append(f'<h3 style="color:#8b929c">{esc(group).upper()}</h3><table width="100%">')
+            for it in items:
+                out.append(f'<tr><td style="color:#8b929c">{esc(it.get("name"))}</td>'
+                           f'<td align="right"><b>{esc(_fmt(it.get("value"), it.get("unit", "")))}</b></td></tr>')
+            out.append("</table>")
+    if report:
+        out.append('<h3 style="color:#8b929c">HEALTH</h3>')
+        colors = {"critical": "#f87171", "warning": "#fb923c", "ok": "#4ade80"}
+        for f in report:
+            sev = f.get("severity", "info")
+            out.append(f'<div><span style="color:{colors.get(sev, "#8b929c")}">[{esc(sev).upper()}]</span> '
+                       f'{esc(f.get("category"))}: {esc(f.get("title"))}</div>')
+    if inventory:
+        out.append('<h3 style="color:#8b929c">INVENTORY</h3>')
+        for section, kv in inventory.items():
+            out.append(f'<h4 style="margin:6px 0;color:#8b929c">{esc(section)}</h4><table width="100%">')
+            for k, v in kv.items():
+                out.append(f'<tr><td style="color:#8b929c">{esc(k)}</td><td align="right"><b>{esc(v)}</b></td></tr>')
+            out.append("</table>")
+    out.append("</div>")
+    return "".join(out)
+
+
+class _Handler(BaseHTTPRequestHandler):
+    def log_message(self, *args):  # quiet
+        pass
+
+    def _authed(self, query: dict) -> bool:
+        return secrets.compare_digest(query.get("t", [""])[0], self.server.token)
+
+    def _send(self, code: int, ctype: str, body: bytes) -> None:
+        self.send_response(code)
+        self.send_header("Content-Type", ctype)
+        self.send_header("Content-Length", str(len(body)))
+        self.end_headers()
+        self.wfile.write(body)
+
+    def do_GET(self) -> None:  # noqa: N802
+        parsed = urlparse(self.path)
+        if not self._authed(parse_qs(parsed.query)):
+            self._send(403, "text/plain", b"Forbidden: missing or invalid share token")
+            return
+        if parsed.path == "/":
+            self._send(200, "text/html; charset=utf-8", _PAGE.encode())
+        elif parsed.path == "/api/snapshot":
+            self._send(200, "application/json", json.dumps(_snapshot(self.server.sampler)).encode())
+        elif parsed.path == "/api/report":
+            self._send(200, "application/json", json.dumps(_report()).encode())
+        elif parsed.path == "/api/inventory":
+            self._send(200, "application/json", json.dumps(_inventory()).encode())
+        else:
+            self._send(404, "text/plain", b"Not found")
+
+
+class _Server(ThreadingHTTPServer):
+    daemon_threads = True
+
+    def __init__(self, addr, token: str):
+        super().__init__(addr, _Handler)
+        self.token = token
+        self.sampler = Sampler(available_sources())
+
+
+def make_server(host: str = "127.0.0.1", port: int = 0, token: str | None = None) -> tuple[_Server, str]:
+    token = token or secrets.token_urlsafe(16)
+    return _Server((host, port), token), token
+
+
+def serve(host: str = "127.0.0.1", port: int = 8765) -> int:
+    srv, token = make_server(host, port)
+    url = f"http://{host}:{srv.server_address[1]}/?t={token}"
+    print(
+        f"Sharing a read-only live view at:\n  {url}\n\n"
+        "Anyone with this URL (and network access to this host) can VIEW your sensors,\n"
+        "health report, and inventory — read-only. For remote help, expose it via a tunnel\n"
+        "(Tailscale / cloudflared / `ssh -R`). Press Ctrl-C to stop sharing.",
+        flush=True,
+    )
+    try:
+        srv.serve_forever()
+    except KeyboardInterrupt:
+        print("\nStopped sharing.")
+    finally:
+        srv.shutdown()
+    return 0

src/rigdoctor/core/uninstall.py

@@ -0,0 +1,42 @@
+"""Uninstall the user-local RigDoctor install (app files; optionally all data).
+
+Mirrors `install.sh --uninstall`. The removal runs in a detached shell so it can
+delete the venv the current process is running from once we exit.
+"""
+
+from __future__ import annotations
+
+import shlex
+import subprocess
+from pathlib import Path
+
+from .. import config
+from . import reccontrol
+
+
+def targets(purge: bool = False) -> list[Path]:
+    """Paths removed by an uninstall. With purge, also config/state/logs."""
+    home = Path.home()
+    share = config.DATA_DIR.parent  # ~/.local/share
+    items = [
+        config.DATA_DIR / "venv",
+        home / ".local" / "bin" / "rigdoctor",
+        home / ".local" / "bin" / "rigdoctor-gui",
+        share / "applications" / "rigdoctor.desktop",
+        share / "icons" / "hicolor" / "scalable" / "apps" / "rigdoctor.svg",
+    ]
+    if purge:
+        items += [config.CONFIG_DIR, config.STATE_DIR, config.DATA_DIR]
+    return items
+
+
+def uninstall(purge: bool = False) -> None:
+    """Stop the recorder, clear the token if purging, and remove the install."""
+    reccontrol.stop_background()
+    if purge:
+        config.clear_token()  # removes keyring entry + any file fallback
+    paths = " ".join(shlex.quote(str(p)) for p in targets(purge))
+    subprocess.Popen(
+        ["/bin/sh", "-c", f"sleep 1; rm -rf {paths}"],
+        start_new_session=True,
+    )

src/rigdoctor/core/updates.py

@@ -1,21 +1,34 @@
-"""Update check (M13, check half): ask the Gitea releases API for the latest version.
+"""Update check (M13): ask the Gitea releases API for the latest version + notes.
 
-Stdlib-only (urllib). Self-update isn't built yet; this only *detects* a newer
-release. Any failure (network, or the instance requiring sign-in for the API)
-returns None so callers can degrade gracefully.
+Stdlib-only (urllib). The Gitea instance requires sign-in, so updates are gated to
+account holders via a Personal Access Token (D18): set $RIGDOCTOR_TOKEN or save one
+with `rigdoctor login`. Returns the latest tag, its release notes (body), and a clear
+state for the UI; `apply_update` performs the no-root self-update.
 """
 
 from __future__ import annotations
 
 import json
+import subprocess
+import sys
+import urllib.error
 import urllib.request
 
 from .. import __version__
+from ..config import load_token
 
 GITEA_BASE = "https://git.jesseyvanofferen.com"
 REPO = "jessey/rigdoctor"
 LATEST_API = f"{GITEA_BASE}/api/v1/repos/{REPO}/releases/latest"
 RELEASES_PAGE = f"{GITEA_BASE}/{REPO}/releases"
+TOKEN_PAGE = f"{GITEA_BASE}/user/settings/applications"
+
+# Update states
+NO_TOKEN = "no-token"
+AUTH = "auth"
+NETWORK = "network"
+UP_TO_DATE = "up-to-date"
+AVAILABLE = "available"
 
 
 def _parse(version: str) -> tuple[int, ...]:
@@ -29,13 +42,78 @@ def is_newer(latest: str, current: str = __version__) -> bool:
         return False
 
 
-def check_latest(timeout: float = 4.0) -> str | None:
-    """Return the latest release tag (e.g. 'v0.0.5'), or None if it can't be determined."""
+def fetch_latest(timeout: float = 5.0) -> tuple[str | None, str, str | None]:
+    """Return (tag, notes, error). error is NO_TOKEN/AUTH/NETWORK, or None on success."""
+    token = load_token()
+    if not token:
+        return (None, "", NO_TOKEN)
+    req = urllib.request.Request(
+        LATEST_API,
+        headers={"Accept": "application/json", "Authorization": f"token {token}"},
+    )
     try:
-        req = urllib.request.Request(LATEST_API, headers={"Accept": "application/json"})
-        with urllib.request.urlopen(req, timeout=timeout) as resp:  # noqa: S310 (https only)
+        with urllib.request.urlopen(req, timeout=timeout) as resp:  # noqa: S310 (https)
             data = json.load(resp)
-        tag = data.get("tag_name")
-        return tag or None
+        return (data.get("tag_name") or None, (data.get("body") or "").strip(), None)
+    except urllib.error.HTTPError as exc:
+        return (None, "", AUTH if exc.code in (401, 403) else NETWORK)
     except Exception:
-        return None
+        return (None, "", NETWORK)
+
+
+def check_latest(timeout: float = 5.0) -> str | None:
+    """Convenience: latest tag or None (ignores notes/error)."""
+    tag, _notes, _error = fetch_latest(timeout)
+    return tag
+
+
+def update_state(timeout: float = 5.0) -> tuple[str, str | None, str]:
+    """Return (state, tag, notes). state in NO_TOKEN/AUTH/NETWORK/UP_TO_DATE/AVAILABLE."""
+    tag, notes, error = fetch_latest(timeout)
+    if error:
+        return (error, None, "")
+    if tag and is_newer(tag):
+        return (AVAILABLE, tag, notes)
+    return (UP_TO_DATE, tag, notes)
+
+
+def list_releases(limit: int = 15, timeout: float = 6.0) -> tuple[list[tuple[str, str, str]], str | None]:
+    """Return ([(tag, date, notes), …], error) for the in-app changelog."""
+    token = load_token()
+    if not token:
+        return ([], NO_TOKEN)
+    req = urllib.request.Request(
+        f"{GITEA_BASE}/api/v1/repos/{REPO}/releases?limit={limit}",
+        headers={"Accept": "application/json", "Authorization": f"token {token}"},
+    )
+    try:
+        with urllib.request.urlopen(req, timeout=timeout) as resp:  # noqa: S310 (https)
+            data = json.load(resp)
+        return ([
+            (r.get("tag_name") or "?", (r.get("published_at") or "")[:10], (r.get("body") or "").strip())
+            for r in data
+        ], None)
+    except urllib.error.HTTPError as exc:
+        return ([], AUTH if exc.code in (401, 403) else NETWORK)
+    except Exception:
+        return ([], NETWORK)
+
+
+def apply_update(tag: str) -> tuple[int, str]:
+    """Self-update the current (user-local) install to `tag` via authenticated pip.
+
+    Installs `rigdoctor[gui] @ git+https://oauth2:<token>@…/rigdoctor.git@<tag>` into
+    the running environment. Returns (exit_code, output) with the token scrubbed.
+    """
+    token = load_token()
+    if not token:
+        return (1, "No update token configured. Run `rigdoctor login`.")
+    host = GITEA_BASE.split("://", 1)[1]
+    ref = f"rigdoctor[gui] @ git+https://oauth2:{token}@{host}/{REPO}.git@{tag}"
+    cmd = [sys.executable, "-m", "pip", "install", "--upgrade", ref]
+    try:
+        proc = subprocess.run(cmd, capture_output=True, text=True, timeout=1800)
+        out = (proc.stdout + proc.stderr).replace(token, "***")
+        return (proc.returncode, out)
+    except (subprocess.SubprocessError, OSError) as exc:
+        return (1, str(exc).replace(token, "***"))

src/rigdoctor/gui/app.py

@@ -3,18 +3,28 @@
 from __future__ import annotations
 
 import sys
+from pathlib import Path
 
+from PySide6.QtGui import QIcon
 from PySide6.QtWidgets import QApplication
 
 from ..config import load_config
+from . import desktop
 from .main_window import MainWindow
 from .theme import STYLESHEET
 
+ICON = Path(__file__).parent / "assets" / "rigdoctor.svg"
+
 
 def main(argv: list[str] | None = None) -> int:
+    desktop.ensure()  # self-register icon + .desktop so updates show it without re-installing
     app = QApplication(argv if argv is not None else sys.argv)
     app.setApplicationName("RigDoctor")
     app.setApplicationDisplayName("RigDoctor")
+    # Match the installed rigdoctor.desktop so the dock/launcher shows our icon (Wayland app-id).
+    app.setDesktopFileName("rigdoctor")
+    if ICON.exists():
+        app.setWindowIcon(QIcon(str(ICON)))
     app.setStyle("Fusion")
     app.setStyleSheet(STYLESHEET)
 

src/rigdoctor/gui/assets/check.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <path d="M3.5 8.5 L6.5 11.5 L12.5 4.5" fill="none" stroke="#06222e"
+        stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/rigdoctor/gui/assets/rigdoctor.svg

@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256" viewBox="0 0 256 256">
+  <rect x="8" y="8" width="240" height="240" rx="52" fill="#15181e"/>
+  <circle cx="128" cy="128" r="84" fill="none" stroke="#2a2f39" stroke-width="14"/>
+  <path d="M128 44 a84 84 0 1 1 -59.4 24.6" fill="none" stroke="#38bdf8"
+        stroke-width="14" stroke-linecap="round"/>
+  <path d="M60 132 H100 L116 96 L140 168 L156 132 H196" fill="none" stroke="#e6e8eb"
+        stroke-width="14" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/rigdoctor/gui/desktop.py

@@ -0,0 +1,51 @@
+"""Best-effort desktop integration: install our icon + .desktop so the dock shows it.
+
+Runs at GUI launch (idempotent), so a self-update + relaunch refreshes the icon without
+re-running install.sh. No-op for non-installed (dev) runs where the launcher is absent.
+"""
+
+from __future__ import annotations
+
+import shutil
+import sys
+from pathlib import Path
+
+from .. import config
+
+_ICON_SRC = Path(__file__).parent / "assets" / "rigdoctor.svg"
+
+_DESKTOP = """[Desktop Entry]
+Type=Application
+Name=RigDoctor
+Comment=Hardware monitoring & crash diagnostics for Linux gamers
+Exec={exec}
+Icon=rigdoctor
+Terminal=false
+Categories=System;Monitor;Utility;
+StartupWMClass=rigdoctor
+"""
+
+
+def ensure() -> None:
+    share = config.DATA_DIR.parent  # ~/.local/share
+
+    try:
+        if _ICON_SRC.exists():
+            icon_dst = share / "icons" / "hicolor" / "scalable" / "apps" / "rigdoctor.svg"
+            icon_dst.parent.mkdir(parents=True, exist_ok=True)
+            if not icon_dst.exists() or icon_dst.read_bytes() != _ICON_SRC.read_bytes():
+                shutil.copyfile(_ICON_SRC, icon_dst)
+    except OSError:
+        pass
+
+    gui_exec = Path(sys.executable).with_name("rigdoctor-gui")
+    if not gui_exec.exists():  # dev / not a normal install — don't fabricate a .desktop
+        return
+    try:
+        desktop = share / "applications" / "rigdoctor.desktop"
+        content = _DESKTOP.format(exec=gui_exec)
+        desktop.parent.mkdir(parents=True, exist_ok=True)
+        if not desktop.exists() or desktop.read_text() != content:
+            desktop.write_text(content)
+    except OSError:
+        pass

src/rigdoctor/gui/health_page.py

@@ -107,6 +107,11 @@ class HealthPage(QWidget):
         self._result.emit(findings)
 
     def _render_findings(self, findings) -> None:
+        self._run_btn.setEnabled(True)
+        if findings is None:  # collection failed — keep current results
+            self._status.setText("check failed")
+            return
+
         while self._list.count():
             item = self._list.takeAt(0)
             w = item.widget()
@@ -122,4 +127,3 @@ class HealthPage(QWidget):
         for finding in findings:
             self._list.addWidget(_finding_widget(finding))
         self._list.addStretch(1)
-        self._run_btn.setEnabled(True)

src/rigdoctor/gui/main_window.py

@@ -2,44 +2,54 @@
 
 from __future__ import annotations
 
+import os
+import sys
 import threading
 
-from PySide6.QtCore import Qt, QUrl, Signal
-from PySide6.QtGui import QDesktopServices
+from PySide6.QtCore import Qt, QProcess, QTimer, Signal
+from PySide6.QtGui import QTextDocument
 from PySide6.QtWidgets import (
+    QApplication,
     QButtonGroup,
+    QDialog,
     QFrame,
     QHBoxLayout,
     QLabel,
     QMainWindow,
+    QMessageBox,
     QPushButton,
     QStackedWidget,
+    QTextEdit,
     QVBoxLayout,
     QWidget,
 )
 
 from .. import __version__
-from ..core import updates
+from ..config import load_config
+from ..core import alerts, elevation, updates
 from .dashboard import Dashboard
 from .health_page import HealthPage
+from .notifications_page import NotificationsPage
 from .recorder_page import RecorderPage
 from .setup_page import SetupPage
+from .share_page import SharePage
 from .theme import ACCENT, GOOD, MUTED
 from .worker import SamplerWorker
 
-_NAV_ITEMS = ["Dashboard", "Logs", "Health", "Setup", "Inventory"]
-_PLACEHOLDERS = {
-    "Inventory": "System inventory (M5) — CPU/GPU/board/RAM/drivers — lands here.",
-}
+_NAV_ITEMS = ["Dashboard", "Logs", "Health", "Setup", "Notifications", "Share"]
 
 
 class MainWindow(QMainWindow):
-    _update_checked = Signal(object)  # latest tag (str) or None
+    _update_checked = Signal(object)  # (state, tag, notes)
+    _update_applied = Signal(int)     # pip exit code
+    _changelog_ready = Signal(object)  # ([(tag, date, notes)], error)
+    _elevated = Signal()              # privileged data collected at launch
 
     def __init__(self, interval: float = 1.0) -> None:
         super().__init__()
         self.setWindowTitle("RigDoctor")
         self.resize(1000, 680)
+        cfg = load_config()
 
         central = QWidget()
         self.setCentralWidget(central)
@@ -57,11 +67,15 @@ class MainWindow(QMainWindow):
         self.recorder_page = RecorderPage()
         self.health_page = HealthPage()
         self.setup_page = SetupPage()
+        self.notifications_page = NotificationsPage()
+        self.notifications_page.changed.connect(self._apply_alert_settings)
+        self.share_page = SharePage()
         self._stack.addWidget(self.dashboard)            # 0 Dashboard
         self._stack.addWidget(self.recorder_page)        # 1 Logs
         self._stack.addWidget(self.health_page)          # 2 Health
         self._stack.addWidget(self.setup_page)           # 3 Setup
-        self._stack.addWidget(self._placeholder_page("Inventory", _PLACEHOLDERS["Inventory"]))  # 4
+        self._stack.addWidget(self.notifications_page)   # 4 Notifications
+        self._stack.addWidget(self.share_page)           # 5 Share
         content_layout.addWidget(self._stack)
 
         layout.addWidget(self._build_sidebar())
@@ -69,11 +83,39 @@ class MainWindow(QMainWindow):
 
         self._worker = SamplerWorker(interval=interval)
         self._worker.sampled.connect(self.dashboard.update_sample)
+        # Desktop alerts (M8): overheat / GPU-lost from the sample stream, new-version below.
+        # Configurable on the Notifications page; gated by AlertMonitor.enabled.
+        self._notified_update_tag = None
+        self._alert_monitor = alerts.AlertMonitor(
+            gpu_temp=float(cfg.get("gpu_temp_alert", 90.0)),
+            cpu_temp=float(cfg.get("cpu_temp_alert", 95.0)),
+        )
+        self._alert_monitor.enabled = bool(cfg.get("alerts_enabled", True))
+        self._worker.sampled.connect(self._alert_monitor.check)
         self._worker.start()
 
-        # Background update check (M13); result lands in the sidebar.
+        # Ask for the password once at launch and collect root-only data (SMART +
+        # dmidecode); Health/Inventory then always show the full picture (config:
+        # elevate_on_launch). Falls back silently to non-root if cancelled/unavailable.
+        if cfg.get("elevate_on_launch", True) and elevation.available():
+            self._elevated.connect(self._on_elevated)
+            threading.Thread(target=self._collect_privileged, daemon=True).start()
+
+        # Update check (M13): once at launch, then periodically so a newly published
+        # release is detected without restarting (interval from config; 0 disables).
+        self._latest_tag = None
+        self._latest_notes = ""
+        self._applied = False
         self._update_checked.connect(self._show_update_state)
-        threading.Thread(target=self._check_updates, daemon=True).start()
+        self._update_applied.connect(self._on_update_applied)
+        self._changelog_ready.connect(self._on_changelog)
+        self._start_update_check()
+        minutes = float(cfg.get("update_check_minutes", 30) or 0)
+        if minutes > 0:
+            self._update_timer = QTimer(self)
+            self._update_timer.setInterval(int(minutes * 60_000))
+            self._update_timer.timeout.connect(self._start_update_check)
+            self._update_timer.start()
 
     def _build_sidebar(self) -> QFrame:
         bar = QFrame()
@@ -109,6 +151,16 @@ class MainWindow(QMainWindow):
         version = QLabel(f"v{__version__}")
         version.setObjectName("Muted")
         v.addWidget(version)
+        changelog_btn = QPushButton("Changelog")
+        changelog_btn.setObjectName("LinkButton")
+        changelog_btn.setCursor(Qt.CursorShape.PointingHandCursor)
+        changelog_btn.clicked.connect(self._show_changelog)
+        v.addWidget(changelog_btn)
+        check_btn = QPushButton("Check for updates")
+        check_btn.setObjectName("LinkButton")
+        check_btn.setCursor(Qt.CursorShape.PointingHandCursor)
+        check_btn.clicked.connect(self._manual_check)
+        v.addWidget(check_btn)
 
         # Update state (filled in by the background check).
         self._update_label = QLabel("checking for updates…")
@@ -117,48 +169,142 @@ class MainWindow(QMainWindow):
         self._update_btn = QPushButton()
         self._update_btn.setObjectName("PrimaryButton")
         self._update_btn.setCursor(Qt.CursorShape.PointingHandCursor)
-        self._update_btn.clicked.connect(lambda: QDesktopServices.openUrl(QUrl(updates.RELEASES_PAGE)))
+        self._update_btn.clicked.connect(self._apply_update)
         self._update_btn.setVisible(False)
         v.addWidget(self._update_btn)
+        self._restart_btn = QPushButton("Restart now")
+        self._restart_btn.setObjectName("PrimaryButton")
+        self._restart_btn.setCursor(Qt.CursorShape.PointingHandCursor)
+        self._restart_btn.clicked.connect(self._restart)
+        self._restart_btn.setVisible(False)
+        v.addWidget(self._restart_btn)
         return bar
 
-    def _check_updates(self) -> None:
-        self._update_checked.emit(updates.check_latest())
+    def _restart(self) -> None:
+        gui = os.path.join(os.path.dirname(sys.executable), "rigdoctor-gui")
+        if os.path.exists(gui):
+            QProcess.startDetached(gui)
+        else:  # dev / not installed next to python
+            QProcess.startDetached(sys.executable, sys.argv)
+        QApplication.instance().quit()
 
-    def _show_update_state(self, latest) -> None:
-        if not latest:
-            self._update_label.setText("update check unavailable")
+    def _apply_update(self) -> None:
+        if not self._latest_tag:
             return
-        if updates.is_newer(latest, __version__):
-            self._update_label.setText(f'<span style="color:{GOOD};">{latest} available</span>')
-            self._update_btn.setText(f"Update to {latest}")
-            self._update_btn.setVisible(True)
+        box = QMessageBox(self)
+        box.setWindowTitle(f"Update to {self._latest_tag}")
+        box.setText(f"Update RigDoctor to {self._latest_tag}?")
+        notes_doc = QTextDocument()
+        notes_doc.setMarkdown(self._latest_notes or "_(no release notes)_")
+        box.setInformativeText(notes_doc.toHtml())  # render Markdown as rich text (#1)
+        box.setStandardButtons(QMessageBox.StandardButton.Ok | QMessageBox.StandardButton.Cancel)
+        box.button(QMessageBox.StandardButton.Ok).setText("Update")
+        if box.exec() != QMessageBox.StandardButton.Ok:
+            return
+        self._update_btn.setEnabled(False)
+        self._update_label.setText("updating…")
+        tag = self._latest_tag
+        threading.Thread(target=lambda: self._update_applied.emit(updates.apply_update(tag)[0]), daemon=True).start()
+
+    def _on_update_applied(self, rc: int) -> None:
+        if rc == 0:
+            self._applied = True
+            self._update_label.setText("update installed")
+            self._update_btn.setVisible(False)
+            self._restart_btn.setVisible(True)
+            if hasattr(self, "_update_timer"):
+                self._update_timer.stop()
         else:
+            self._update_label.setText("update failed")
+            self._update_btn.setEnabled(True)
+
+    def _collect_privileged(self) -> None:
+        data = elevation.collect_via_pkexec()
+        if data is not None:
+            elevation.set_privileged(data)
+            self._elevated.emit()
+
+    def _on_elevated(self) -> None:
+        # Re-run Health now that root-only SMART data is available. (dmidecode is still
+        # collected and used by the relay guest view + the CLI `rigdoctor inventory`.)
+        self.health_page._run()
+
+    def _apply_alert_settings(self) -> None:
+        cfg = load_config()
+        self._alert_monitor.enabled = bool(cfg.get("alerts_enabled", True))
+        self._alert_monitor.gpu_temp = float(cfg.get("gpu_temp_alert", 90.0))
+        self._alert_monitor.cpu_temp = float(cfg.get("cpu_temp_alert", 95.0))
+
+    def _manual_check(self) -> None:
+        if self._applied:
+            return
+        self._update_label.setText("checking for updates…")
+        self._start_update_check()
+
+    def _start_update_check(self) -> None:
+        threading.Thread(target=self._check_updates, daemon=True).start()
+
+    def _show_changelog(self) -> None:
+        dialog = QDialog(self)
+        dialog.setWindowTitle("RigDoctor — Changelog")
+        dialog.resize(560, 540)
+        layout = QVBoxLayout(dialog)
+        view = QTextEdit()
+        view.setObjectName("Report")
+        view.setReadOnly(True)
+        view.setPlainText("Loading…")
+        layout.addWidget(view)
+        self._changelog_view = view
+        dialog.show()
+        threading.Thread(target=self._fetch_changelog, daemon=True).start()
+
+    def _fetch_changelog(self) -> None:
+        self._changelog_ready.emit(updates.list_releases())
+
+    def _on_changelog(self, result) -> None:
+        view = getattr(self, "_changelog_view", None)
+        if view is None:
+            return
+        releases, error = result
+        if error == updates.NO_TOKEN:
+            view.setPlainText("Add an update token (Setup → Update access) to load the changelog.")
+            return
+        if error or not releases:
+            view.setPlainText("Couldn't load the changelog from the update server.")
+            return
+        blocks = []
+        for tag, date, notes in releases:
+            title = f"## {tag}" + (f" — {date}" if date else "")
+            blocks.append(f"{title}\n\n{notes or '_(no notes)_'}")
+        view.setMarkdown("\n\n".join(blocks))  # render Markdown instead of raw text (#1)
+
+    def _check_updates(self) -> None:
+        self._update_checked.emit(updates.update_state())
+
+    def _show_update_state(self, result) -> None:
+        if self._applied:  # an update was applied this session; awaiting restart
+            return
+        state, tag, notes = result
+        self._latest_tag = tag
+        self._latest_notes = notes
+        self._update_btn.setVisible(False)
+        if state == updates.NO_TOKEN:
+            self._update_label.setText("connect to update server")
+        elif state == updates.AUTH:
+            self._update_label.setText("update access denied")
+        elif state == updates.NETWORK:
+            self._update_label.setText("update check unavailable")
+        elif state == updates.AVAILABLE:
+            self._update_label.setText(f'<span style="color:{GOOD};">{tag} available</span>')
+            self._update_btn.setText(f"Update to {tag}")
+            self._update_btn.setVisible(True)
+            if self._alert_monitor.enabled and tag != self._notified_update_tag:
+                self._notified_update_tag = tag  # once per version, not every poll
+                alerts.notify("Update available", f"RigDoctor {tag} is available — open RigDoctor to update.")
+        else:  # UP_TO_DATE
             self._update_label.setText("up-to-date")
 
-    def _placeholder_page(self, title: str, description: str) -> QWidget:
-        page = QWidget()
-        page.setObjectName("Page")
-        v = QVBoxLayout(page)
-        v.setContentsMargins(20, 18, 20, 18)
-        v.setSpacing(16)
-        head = QLabel(title)
-        head.setObjectName("PageTitle")
-        v.addWidget(head)
-
-        card = QFrame()
-        card.setObjectName("Card")
-        cv = QVBoxLayout(card)
-        cv.setContentsMargins(24, 48, 24, 48)
-        msg = QLabel(description)
-        msg.setObjectName("Muted")
-        msg.setWordWrap(True)
-        msg.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        cv.addWidget(msg)
-        v.addWidget(card)
-        v.addStretch(1)
-        return page
-
     def closeEvent(self, event) -> None:  # noqa: N802 (Qt override)
         self._worker.stop()
+        self.share_page.shutdown()
         super().closeEvent(event)

src/rigdoctor/gui/notifications_page.py

@@ -0,0 +1,108 @@
+"""Notifications page (M8 config): user-configurable alert settings."""
+
+from __future__ import annotations
+
+from PySide6.QtCore import Qt, Signal
+from PySide6.QtWidgets import (
+    QCheckBox,
+    QDoubleSpinBox,
+    QFrame,
+    QGridLayout,
+    QHBoxLayout,
+    QLabel,
+    QPushButton,
+    QVBoxLayout,
+    QWidget,
+)
+
+from ..config import load_config, update_config
+from ..core import alerts
+
+
+class NotificationsPage(QWidget):
+    changed = Signal()  # settings saved — main window re-applies them live
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.setObjectName("Page")
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 18)
+        root.setSpacing(16)
+
+        title = QLabel("Notifications")
+        title.setObjectName("PageTitle")
+        root.addWidget(title)
+
+        card = QFrame()
+        card.setObjectName("Card")
+        v = QVBoxLayout(card)
+        v.setContentsMargins(16, 14, 16, 14)
+        v.setSpacing(10)
+        head = QLabel("Alerts")
+        head.setStyleSheet("font-weight: 700; background: transparent;")
+        v.addWidget(head)
+
+        self._enabled = QCheckBox("Enable desktop notifications")
+        v.addWidget(self._enabled)
+
+        grid = QGridLayout()
+        grid.setHorizontalSpacing(12)
+        grid.setColumnStretch(2, 1)
+        self._gpu = self._spin()
+        self._cpu = self._spin()
+        grid.addWidget(QLabel("GPU temperature alert"), 0, 0)
+        grid.addWidget(self._gpu, 0, 1)
+        grid.addWidget(QLabel("CPU temperature alert"), 1, 0)
+        grid.addWidget(self._cpu, 1, 1)
+        v.addLayout(grid)
+
+        note = QLabel("GPU-lost and new-version alerts are included whenever notifications are enabled.")
+        note.setObjectName("Muted")
+        note.setWordWrap(True)
+        v.addWidget(note)
+
+        buttons = QHBoxLayout()
+        save = QPushButton("Save")
+        save.setObjectName("PrimaryButton")
+        save.clicked.connect(self._save)
+        test = QPushButton("Send test")
+        test.clicked.connect(self._test)
+        buttons.addWidget(save)
+        buttons.addWidget(test)
+        buttons.addStretch(1)
+        v.addLayout(buttons)
+        self._status = QLabel("")
+        self._status.setObjectName("Muted")
+        v.addWidget(self._status)
+
+        root.addWidget(card)
+        root.addStretch(1)
+        self._load()
+
+    @staticmethod
+    def _spin() -> QDoubleSpinBox:
+        spin = QDoubleSpinBox()
+        spin.setRange(40, 110)
+        spin.setDecimals(0)
+        spin.setSingleStep(1)
+        spin.setSuffix(" °C")
+        return spin
+
+    def _load(self) -> None:
+        cfg = load_config()
+        self._enabled.setChecked(bool(cfg.get("alerts_enabled", True)))
+        self._gpu.setValue(float(cfg.get("gpu_temp_alert", 90.0)))
+        self._cpu.setValue(float(cfg.get("cpu_temp_alert", 95.0)))
+
+    def _save(self) -> None:
+        update_config(
+            alerts_enabled=self._enabled.isChecked(),
+            gpu_temp_alert=self._gpu.value(),
+            cpu_temp_alert=self._cpu.value(),
+        )
+        self.changed.emit()
+        self._status.setText("Saved.")
+
+    def _test(self) -> None:
+        ok = alerts.notify("RigDoctor", "Test notification — alerts are working.")
+        self._status.setText("Test notification sent." if ok else "notify-send not found — install libnotify-bin (Setup).")

src/rigdoctor/gui/setup_page.py

@@ -4,11 +4,15 @@ from __future__ import annotations
 
 import threading
 
-from PySide6.QtCore import Qt, Signal
+from PySide6.QtCore import Qt, QUrl, Signal
+from PySide6.QtGui import QDesktopServices
 from PySide6.QtWidgets import (
+    QApplication,
     QFrame,
     QHBoxLayout,
     QLabel,
+    QLineEdit,
+    QMessageBox,
     QPushButton,
     QSizePolicy,
     QTextEdit,
@@ -16,8 +20,9 @@ from PySide6.QtWidgets import (
     QWidget,
 )
 
-from ..core import installer, sysenv
-from .theme import GOOD, MUTED
+from .. import config
+from ..core import installer, sysenv, uninstall, updates
+from .theme import GOOD, MUTED, WARN
 
 
 def _panel(title: str) -> tuple[QFrame, QVBoxLayout]:
@@ -33,13 +38,23 @@ def _panel(title: str) -> tuple[QFrame, QVBoxLayout]:
     return frame, layout
 
 
+_BACKEND_DESC = {
+    "env": "token from $RIGDOCTOR_TOKEN",
+    "keyring": "token stored in the OS keyring (encrypted)",
+    "file": "token stored in a 0600 file — install libsecret-tools to encrypt it",
+    "none": "no token saved",
+}
+
+
 class SetupPage(QWidget):
     _installed = Signal(int, str)
+    _upd_state = Signal(object)
 
     def __init__(self) -> None:
         super().__init__()
         self.setObjectName("Page")
         self._installed.connect(self._on_installed)
+        self._upd_state.connect(self._on_upd_state)
 
         root = QVBoxLayout(self)
         root.setContentsMargins(20, 18, 20, 18)
@@ -71,6 +86,32 @@ class SetupPage(QWidget):
         comp_layout.addLayout(controls)
         root.addWidget(comp_card)
 
+        # Account access (M13/M12): one Gitea token gates updates and session sharing.
+        upd_card, upd_layout = _panel("Account access")
+        hint = QLabel("A Gitea access token unlocks updates and session sharing. "
+                      "Create it with scopes <b>read:user</b> and <b>read:repository</b>.")
+        hint.setObjectName("Muted")
+        hint.setWordWrap(True)
+        upd_layout.addWidget(hint)
+        self._upd_status = QLabel("")
+        self._upd_status.setObjectName("Muted")
+        self._upd_status.setWordWrap(True)
+        upd_layout.addWidget(self._upd_status)
+        token_row = QHBoxLayout()
+        self._token_input = QLineEdit()
+        self._token_input.setEchoMode(QLineEdit.EchoMode.Password)
+        self._token_input.setPlaceholderText("Paste a Gitea token (read:user + read:repository)")
+        save_btn = QPushButton("Save token")
+        save_btn.setObjectName("PrimaryButton")
+        save_btn.clicked.connect(self._save_token)
+        get_btn = QPushButton("Get a token")
+        get_btn.clicked.connect(lambda: QDesktopServices.openUrl(QUrl(updates.TOKEN_PAGE)))
+        token_row.addWidget(self._token_input, 1)
+        token_row.addWidget(save_btn)
+        token_row.addWidget(get_btn)
+        upd_layout.addLayout(token_row)
+        root.addWidget(upd_card)
+
         self._output = QTextEdit()
         self._output.setObjectName("Report")
         self._output.setReadOnly(True)
@@ -79,7 +120,40 @@ class SetupPage(QWidget):
         root.addWidget(self._output)
         root.addStretch(1)
 
+        danger = QHBoxLayout()
+        danger.addStretch(1)
+        uninstall_btn = QPushButton("Uninstall RigDoctor")
+        uninstall_btn.setObjectName("DangerButton")
+        uninstall_btn.clicked.connect(self._uninstall)
+        danger.addWidget(uninstall_btn)
+        root.addLayout(danger)
+
         self._refresh()
+        self._refresh_update_status()
+
+    def _uninstall(self) -> None:
+        box = QMessageBox(self)
+        box.setIcon(QMessageBox.Icon.Warning)
+        box.setWindowTitle("Uninstall RigDoctor")
+        box.setText("Uninstall RigDoctor?")
+        box.setInformativeText(
+            "This removes the app. Choose “Remove all” to also delete your settings, "
+            "update token, and captured logs."
+        )
+        remove_all = box.addButton("Remove all", QMessageBox.ButtonRole.DestructiveRole)
+        app_only = box.addButton("Uninstall", QMessageBox.ButtonRole.AcceptRole)
+        box.addButton("Cancel", QMessageBox.ButtonRole.RejectRole)
+        box.exec()
+        clicked = box.clickedButton()
+        if clicked is remove_all:
+            purge = True
+        elif clicked is app_only:
+            purge = False
+        else:
+            return
+        uninstall.uninstall(purge=purge)
+        QMessageBox.information(self, "RigDoctor", "Uninstalling… RigDoctor will close now.")
+        QApplication.instance().quit()
 
     def _refresh(self) -> None:
         self._env.setText(
@@ -126,3 +200,40 @@ class SetupPage(QWidget):
         self._output.setPlainText(out[-4000:])
         self._install_btn.setText("Install missing")
         self._refresh()
+        # If libsecret-tools was just installed, move a file token into the keyring.
+        if config.token_backend() == "file" and config.keyring_available():
+            token = config.load_token()
+            if token:
+                config.save_token(token)
+        self._refresh_update_status()
+
+    # --- update access (token) ------------------------------------------------
+    def _save_token(self) -> None:
+        token = self._token_input.text().strip()
+        if not token:
+            return
+        config.save_token(token)
+        self._token_input.clear()
+        self._refresh_update_status()
+
+    def _refresh_update_status(self) -> None:
+        self._upd_status.setText(f"{_BACKEND_DESC[config.token_backend()]} · checking…")
+        threading.Thread(target=self._check_update, daemon=True).start()
+
+    def _check_update(self) -> None:
+        self._upd_state.emit((config.token_backend(), updates.update_state()))
+
+    def _on_upd_state(self, result) -> None:
+        backend, (state, tag, _notes) = result
+        msg = {
+            updates.NO_TOKEN: "paste a token below to enable updates",
+            updates.AUTH: "token rejected — check its scope/permissions",
+            updates.NETWORK: "couldn't reach the update server",
+            updates.UP_TO_DATE: f"up to date ({tag})" if tag else "up to date",
+            updates.AVAILABLE: f"update available: {tag}",
+        }[state]
+        color = GOOD if state == updates.AVAILABLE else (WARN if state == updates.AUTH else MUTED)
+        self._upd_status.setText(
+            f"<span style='color:{MUTED}'>{_BACKEND_DESC[backend]}</span> · "
+            f"<span style='color:{color}'>{msg}</span>"
+        )

src/rigdoctor/gui/share_page.py

@@ -0,0 +1,348 @@
+"""Share page (M12): host or join a shared session over the relay.
+
+Guest sees the host's live sensors + health + inventory (read-only). If the host enables it,
+a full **PTY terminal** is shared: the guest types and the commands run on the host (as the
+host's user), the host reads along, and the host can type too — e.g. a sudo password, which
+stays local and is never sent to the guest.
+"""
+
+from __future__ import annotations
+
+import base64
+import json
+
+from PySide6.QtCore import Qt, QSocketNotifier, QTimer, QUrl
+from PySide6.QtWebSockets import QWebSocket
+from PySide6.QtWidgets import (
+    QCheckBox,
+    QFrame,
+    QHBoxLayout,
+    QLabel,
+    QLineEdit,
+    QPushButton,
+    QTextEdit,
+    QVBoxLayout,
+    QWidget,
+)
+
+from ..config import load_config, load_token
+from ..core import share
+from ..core.pty_session import PtySession
+from ..core.sampler import Sampler
+from ..core.sources import available_sources
+from .terminal_widget import TerminalView
+
+
+def _relay_url() -> str:
+    return load_config().get("relay_url", "wss://rigdoctor.jesseyvanofferen.com").rstrip("/")
+
+
+def _b64(data: bytes) -> str:
+    return base64.b64encode(data).decode("ascii")
+
+
+def _card(title: str) -> tuple[QFrame, QVBoxLayout]:
+    card = QFrame()
+    card.setObjectName("Card")
+    v = QVBoxLayout(card)
+    v.setContentsMargins(16, 14, 16, 14)
+    v.setSpacing(10)
+    head = QLabel(title)
+    head.setStyleSheet("font-weight: 700; background: transparent;")
+    v.addWidget(head)
+    return card, v
+
+
+class SharePage(QWidget):
+    def __init__(self) -> None:
+        super().__init__()
+        self.setObjectName("Page")
+        self._sampler = Sampler(available_sources())
+        self._host_ws: QWebSocket | None = None
+        self._guest_ws: QWebSocket | None = None
+        self._pty: PtySession | None = None
+        self._pty_notifier: QSocketNotifier | None = None
+        self._last_report = None
+        self._last_inv = None
+        self._timer = QTimer(self)
+        self._timer.setInterval(2000)
+        self._timer.timeout.connect(self._stream)
+
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 18)
+        root.setSpacing(14)
+        title = QLabel("Share")
+        title.setObjectName("PageTitle")
+        root.addWidget(title)
+        root.addWidget(self._build_host())
+        root.addWidget(self._build_guest(), 1)
+
+    # ------------------------------------------------------------------ host
+    def _build_host(self) -> QFrame:
+        card, v = _card("Start a shared session")
+        self._host_status = QLabel("Let someone with an account view your machine, read-only.")
+        self._host_status.setObjectName("Muted")
+        self._host_status.setWordWrap(True)
+        v.addWidget(self._host_status)
+
+        row = QHBoxLayout()
+        self._start_btn = QPushButton("Start shared session")
+        self._start_btn.setObjectName("PrimaryButton")
+        self._start_btn.clicked.connect(self._start_host)
+        self._stop_btn = QPushButton("Stop")
+        self._stop_btn.setEnabled(False)
+        self._stop_btn.clicked.connect(self._stop_host)
+        self._code_label = QLabel("")
+        self._code_label.setStyleSheet("font-weight:700; font-size:18px; color:#38bdf8; background:transparent;")
+        self._code_label.setTextInteractionFlags(Qt.TextInteractionFlag.TextSelectableByMouse)
+        row.addWidget(self._start_btn)
+        row.addWidget(self._stop_btn)
+        row.addSpacing(12)
+        row.addWidget(self._code_label)
+        row.addStretch(1)
+        v.addLayout(row)
+
+        self._allow_term = QCheckBox("Allow remote terminal — the guest runs commands as your user (you read along; you can type too, e.g. a sudo password)")
+        self._allow_term.setStyleSheet("color:#fb923c; background:transparent;")
+        self._allow_term.toggled.connect(self._toggle_terminal)
+        v.addWidget(self._allow_term)
+
+        self._host_term = TerminalView()
+        self._host_term.keys.connect(lambda b: self._pty.write(b) if self._pty else None)
+        self._host_term.resized.connect(lambda r, c: self._pty.set_size(r, c) if self._pty else None)
+        self._host_term.setVisible(False)
+        v.addWidget(self._host_term)
+        return card
+
+    def _start_host(self) -> None:
+        if not load_token():
+            self._host_status.setText("Set a Gitea access token in Setup → Account access first.")
+            return
+        self._host_status.setText("Connecting to the relay…")
+        self._start_btn.setEnabled(False)
+        self._host_ws = QWebSocket()
+        self._host_ws.connected.connect(lambda: self._host_ws.sendTextMessage(json.dumps({"token": load_token()})))
+        self._host_ws.textMessageReceived.connect(self._host_msg)
+        self._host_ws.disconnected.connect(self._host_closed)
+        self._host_ws.errorOccurred.connect(lambda *_: self._host_status.setText(f"Relay error: {self._host_ws.errorString()}"))
+        self._host_ws.open(QUrl(_relay_url() + "/ws/host"))
+
+    def _host_msg(self, text: str) -> None:
+        try:
+            data = json.loads(text)
+        except ValueError:
+            return
+        if data.get("error"):
+            self._host_status.setText(f"Rejected: {data['error']}")
+            return
+        if "code" in data:  # relay handshake
+            self._code_label.setText(data["code"])
+            self._host_status.setText(f"Sharing as {data.get('user', '?')} — give this code to whoever should view your machine.")
+            self._stop_btn.setEnabled(True)
+            self._host_ws.sendTextMessage(share.host_full_frame(self._sampler))
+            self._send_terminal_state()
+            if self._allow_term.isChecked():
+                self._start_pty()
+            self._timer.start()
+            return
+        kind = data.get("type")  # frames forwarded from a guest
+        if kind == "req_full":
+            # A guest just joined — send a full frame AND the current terminal state, so a
+            # guest that joins *after* the host enabled the terminal still gets access.
+            self._host_ws.sendTextMessage(share.host_full_frame(self._sampler))
+            self._send_terminal_state()
+        elif kind == "pty_in" and self._pty:
+            self._pty.write(base64.b64decode(data["data"]))
+        elif kind == "pty_resize" and self._pty:
+            self._pty.set_size(int(data["rows"]), int(data["cols"]))
+
+    def _toggle_terminal(self, on: bool) -> None:
+        if on and self._host_ws and self._code_label.text():
+            self._start_pty()
+        elif not on:
+            self._stop_pty()
+        self._send_terminal_state()
+
+    def _send_terminal_state(self) -> None:
+        if self._host_ws and self._code_label.text():
+            self._host_ws.sendTextMessage(json.dumps({"type": "terminal", "enabled": self._allow_term.isChecked()}))
+
+    def _start_pty(self) -> None:
+        if self._pty:
+            return
+        rows, cols = self._host_term.grid()
+        self._pty = PtySession(rows=rows, cols=cols)
+        self._pty_notifier = QSocketNotifier(self._pty.master_fd, QSocketNotifier.Type.Read, self)
+        self._pty_notifier.activated.connect(self._on_pty_output)
+        self._host_term.reset()
+        self._host_term.setVisible(True)
+
+    def _on_pty_output(self) -> None:
+        if not self._pty:
+            return
+        data = self._pty.read()
+        if not data:  # shell exited / EOF
+            self._stop_pty()
+            self._send_terminal_state()
+            self._allow_term.setChecked(False)
+            return
+        self._host_term.feed(data)
+        if self._host_ws:
+            self._host_ws.sendTextMessage(json.dumps({"type": "pty", "data": _b64(data)}))
+
+    def _stop_pty(self) -> None:
+        if self._pty_notifier:
+            self._pty_notifier.setEnabled(False)
+            self._pty_notifier = None
+        if self._pty:
+            self._pty.close()
+            self._pty = None
+        self._host_term.setVisible(False)
+
+    def _stream(self) -> None:
+        if self._host_ws:
+            self._host_ws.sendTextMessage(share.host_snapshot_frame(self._sampler))
+
+    def _stop_host(self) -> None:
+        self._timer.stop()
+        self._stop_pty()
+        if self._host_ws:
+            self._host_ws.close()
+            self._host_ws = None
+        self._code_label.setText("")
+        self._stop_btn.setEnabled(False)
+        self._start_btn.setEnabled(True)
+        self._host_status.setText("Stopped sharing.")
+
+    def _host_closed(self) -> None:
+        self._timer.stop()
+        self._stop_pty()
+        self._start_btn.setEnabled(True)
+        self._stop_btn.setEnabled(False)
+        if self._code_label.text():
+            self._code_label.setText("")
+            self._host_status.setText("Disconnected from the relay.")
+
+    # ----------------------------------------------------------------- guest
+    def _build_guest(self) -> QFrame:
+        card, v = _card("Join a shared session")
+        row = QHBoxLayout()
+        self._code_input = QLineEdit()
+        self._code_input.setPlaceholderText("Enter share code")
+        self._code_input.setMaxLength(6)
+        self._code_input.setFixedWidth(160)
+        self._join_btn = QPushButton("Join")
+        self._join_btn.setObjectName("PrimaryButton")
+        self._join_btn.clicked.connect(self._join)
+        self._leave_btn = QPushButton("Leave")
+        self._leave_btn.setEnabled(False)
+        self._leave_btn.clicked.connect(self._leave)
+        row.addWidget(self._code_input)
+        row.addWidget(self._join_btn)
+        row.addWidget(self._leave_btn)
+        row.addStretch(1)
+        v.addLayout(row)
+        self._guest_status = QLabel("")
+        self._guest_status.setObjectName("Muted")
+        v.addWidget(self._guest_status)
+
+        self._view = QTextEdit()
+        self._view.setObjectName("Report")
+        self._view.setReadOnly(True)
+        self._view.setVisible(False)
+        self._view.setMinimumHeight(200)
+        v.addWidget(self._view)
+
+        self._term_label = QLabel("")
+        self._term_label.setObjectName("Muted")
+        self._term_label.setVisible(False)
+        v.addWidget(self._term_label)
+        self._guest_term = TerminalView()
+        self._guest_term.keys.connect(self._guest_key)
+        self._guest_term.resized.connect(self._guest_resize)
+        self._guest_term.setVisible(False)
+        v.addWidget(self._guest_term)
+        return card
+
+    def _join(self) -> None:
+        code = self._code_input.text().strip().upper()
+        if not load_token():
+            self._guest_status.setText("Set a Gitea access token in Setup → Account access first.")
+            return
+        if not code:
+            self._guest_status.setText("Enter a share code.")
+            return
+        self._guest_status.setText("Connecting…")
+        self._join_btn.setEnabled(False)
+        self._guest_ws = QWebSocket()
+        self._guest_ws.connected.connect(lambda: self._guest_ws.sendTextMessage(json.dumps({"token": load_token()})))
+        self._guest_ws.textMessageReceived.connect(self._guest_msg)
+        self._guest_ws.disconnected.connect(self._guest_closed)
+        self._guest_ws.errorOccurred.connect(lambda *_: self._guest_status.setText(f"Relay error: {self._guest_ws.errorString()}"))
+        self._guest_ws.open(QUrl(_relay_url() + "/ws/guest/" + code))
+
+    def _guest_msg(self, text: str) -> None:
+        try:
+            data = json.loads(text)
+        except ValueError:
+            return
+        if data.get("error"):
+            self._guest_status.setText(data["error"])
+            return
+        if "joined" in data:
+            self._guest_status.setText(f"Viewing {data.get('host', '?')}'s machine — read-only.")
+            self._leave_btn.setEnabled(True)
+            self._view.setVisible(True)
+            self._guest_ws.sendTextMessage(json.dumps({"type": "req_full"}))
+            return
+        kind = data.get("type")
+        if kind in ("full", "snapshot"):
+            if kind == "full":
+                self._last_report = data.get("report")
+                self._last_inv = data.get("inventory")
+            self._view.setHtml(share.guest_html(data.get("snapshot"), self._last_report, self._last_inv))
+        elif kind == "terminal":
+            self._set_terminal_visible(bool(data.get("enabled")))
+        elif kind == "pty":
+            self._guest_term.feed(base64.b64decode(data["data"]))
+
+    def _set_terminal_visible(self, enabled: bool) -> None:
+        self._term_label.setVisible(True)
+        self._term_label.setText("Terminal enabled by host — your keystrokes run on their machine. Click here and type."
+                                 if enabled else "Terminal not enabled by the host.")
+        self._guest_term.setVisible(enabled)
+        if enabled:
+            self._guest_term.reset()
+            self._guest_resize(*self._guest_term.grid())
+            self._guest_term.setFocus()
+
+    def _guest_key(self, data: bytes) -> None:
+        if self._guest_ws:
+            self._guest_ws.sendTextMessage(json.dumps({"type": "pty_in", "data": _b64(data)}))
+
+    def _guest_resize(self, rows: int, cols: int) -> None:
+        if self._guest_ws:
+            self._guest_ws.sendTextMessage(json.dumps({"type": "pty_resize", "rows": rows, "cols": cols}))
+
+    def _leave(self) -> None:
+        if self._guest_ws:
+            self._guest_ws.close()
+            self._guest_ws = None
+        for w in (self._view, self._term_label, self._guest_term):
+            w.setVisible(False)
+        self._leave_btn.setEnabled(False)
+        self._join_btn.setEnabled(True)
+        self._guest_status.setText("Left the session.")
+
+    def _guest_closed(self) -> None:
+        self._join_btn.setEnabled(True)
+        self._leave_btn.setEnabled(False)
+        if self._view.isVisible():
+            self._guest_status.setText("Session ended (host disconnected).")
+
+    def shutdown(self) -> None:
+        self._timer.stop()
+        self._stop_pty()
+        for ws in (self._host_ws, self._guest_ws):
+            if ws:
+                ws.close()

src/rigdoctor/gui/terminal_widget.py

@@ -0,0 +1,98 @@
+"""A minimal terminal view: renders PTY output via pyte and emits keystrokes (M12, Tier 3).
+
+Used by both sides of a shared session — the host (mirrors its local PTY, can also type, e.g.
+a sudo password) and the guest (renders the streamed PTY, sends keystrokes). Monochrome for
+now; cursor addressing / layout (vim, top) work via pyte.
+"""
+
+from __future__ import annotations
+
+import pyte
+from PySide6.QtCore import Qt, Signal
+from PySide6.QtGui import QFontDatabase, QFontMetrics, QTextCursor
+from PySide6.QtWidgets import QPlainTextEdit
+
+
+class TerminalView(QPlainTextEdit):
+    keys = Signal(bytes)        # user keystrokes -> bytes for the PTY
+    resized = Signal(int, int)  # rows, cols
+
+    def __init__(self, rows: int = 24, cols: int = 80):
+        super().__init__()
+        self.setLineWrapMode(QPlainTextEdit.LineWrapMode.NoWrap)
+        self.setFont(QFontDatabase.systemFont(QFontDatabase.SystemFont.FixedFont))
+        self.setUndoRedoEnabled(False)
+        self.setMinimumHeight(260)
+        self._rows, self._cols = rows, cols
+        self._screen = pyte.HistoryScreen(cols, rows, history=1000, ratio=0.5)
+        self._stream = pyte.ByteStream(self._screen)
+
+    def grid(self) -> tuple[int, int]:
+        return self._rows, self._cols
+
+    def feed(self, data: bytes) -> None:
+        self._stream.feed(data)
+        self._render()
+
+    def reset(self) -> None:
+        self._screen.reset()
+        self._render()
+
+    def _row_text(self, row) -> str:
+        return "".join(row[x].data for x in range(self._cols)).rstrip()
+
+    def _render(self) -> None:
+        bar = self.verticalScrollBar()
+        at_bottom = bar.value() >= bar.maximum() - 2
+        prev = bar.value()
+        history = [self._row_text(r) for r in self._screen.history.top]  # scrollback
+        self.setPlainText("\n".join(history + list(self._screen.display)))
+        if at_bottom:  # follow output; place caret at the real (row, col)
+            cursor = self.textCursor()
+            cursor.movePosition(QTextCursor.MoveOperation.Start)
+            cursor.movePosition(QTextCursor.MoveOperation.Down, QTextCursor.MoveMode.MoveAnchor, len(history) + self._screen.cursor.y)
+            cursor.movePosition(QTextCursor.MoveOperation.Right, QTextCursor.MoveMode.MoveAnchor, self._screen.cursor.x)
+            self.setTextCursor(cursor)
+            self.ensureCursorVisible()
+        else:  # user scrolled up to read — keep their place
+            bar.setValue(prev)
+
+    def resizeEvent(self, event):  # noqa: N802 (Qt override)
+        super().resizeEvent(event)
+        fm = QFontMetrics(self.font())
+        cw = max(1, fm.horizontalAdvance("M"))
+        ch = max(1, fm.height())
+        cols = max(20, self.viewport().width() // cw)
+        rows = max(6, self.viewport().height() // ch)
+        if (rows, cols) != (self._rows, self._cols):
+            self._rows, self._cols = rows, cols
+            self._screen.resize(rows, cols)
+            self._render()
+            self.resized.emit(rows, cols)
+
+    def keyPressEvent(self, event):  # noqa: N802 (Qt override)
+        data = self._translate(event)
+        if data:
+            self.keys.emit(data)
+        event.accept()  # display comes from PTY output, not local editing
+
+    @staticmethod
+    def _translate(event) -> bytes:
+        key = event.key()
+        mod = event.modifiers()
+        k = Qt.Key
+        if mod & Qt.KeyboardModifier.ControlModifier and k.Key_A.value <= key <= k.Key_Z.value:
+            return bytes([key - k.Key_A.value + 1])  # Ctrl-A..Ctrl-Z
+        special = {
+            k.Key_Return.value: b"\r", k.Key_Enter.value: b"\r",
+            k.Key_Backspace.value: b"\x7f", k.Key_Tab.value: b"\t",
+            k.Key_Escape.value: b"\x1b",
+            k.Key_Up.value: b"\x1b[A", k.Key_Down.value: b"\x1b[B",
+            k.Key_Right.value: b"\x1b[C", k.Key_Left.value: b"\x1b[D",
+            k.Key_Home.value: b"\x1b[H", k.Key_End.value: b"\x1b[F",
+            k.Key_Delete.value: b"\x1b[3~", k.Key_PageUp.value: b"\x1b[5~", k.Key_PageDown.value: b"\x1b[6~",
+        }
+        if key in special:
+            return special[key]
+        text = event.text()
+        return text.encode("utf-8") if text else b""

src/rigdoctor/gui/theme.py

@@ -2,6 +2,10 @@
 
 from __future__ import annotations
 
+from pathlib import Path
+
+_CHECK = (Path(__file__).parent / "assets" / "check.svg").as_posix()
+
 # Palette (dark)
 BG = "#101216"
 SIDEBAR = "#15181e"
@@ -10,6 +14,7 @@ CARD_BORDER = "#2a2f39"
 TRACK = "#2a2f39"
 TEXT = "#e6e8eb"
 MUTED = "#8b929c"
+INPUT_BG = "#0d0f13"  # form-control background (must stay dark — see contrast rule)
 
 ACCENT = "#38bdf8"
 COLD = "#7dd3fc"  # icey-blue
@@ -107,4 +112,42 @@ QDoubleSpinBox, QSpinBox {{
 QTextEdit#Report {{
     background: #0d0f13; color: #cfd3da; border: 1px solid {CARD_BORDER}; border-radius: 8px;
 }}
+
+QPushButton#DangerButton {{
+    background: transparent; color: {CRIT}; border: 1px solid {CRIT};
+    border-radius: 8px; padding: 7px 14px;
+}}
+QPushButton#DangerButton:hover {{ background: {CRIT}; color: #1a0d0d; }}
+
+QPushButton#LinkButton {{
+    background: transparent; border: none; color: {MUTED};
+    text-align: left; padding: 0; text-decoration: underline;
+}}
+QPushButton#LinkButton:hover {{ color: {TEXT}; }}
+
+QCheckBox {{ spacing: 8px; background: transparent; }}
+QCheckBox::indicator {{
+    width: 17px; height: 17px; border-radius: 4px;
+    border: 1px solid {MUTED}; background: #262b34;
+}}
+QCheckBox::indicator:hover {{ border-color: {ACCENT}; }}
+QCheckBox::indicator:checked {{
+    background: {ACCENT}; border-color: {ACCENT}; image: url("{_CHECK}");
+}}
+
+/* Dialogs (update prompt, changelog) — match the dark theme so text is readable. */
+QDialog {{ background: {BG}; }}
+QMessageBox {{ background: {CARD}; }}
+QDialog QLabel, QMessageBox QLabel {{ color: {TEXT}; background: transparent; }}
+
+/* Form controls: keep dark bg + light text (Fusion defaults to light-on-light here). */
+QLineEdit, QPlainTextEdit, QAbstractSpinBox, QComboBox {{
+    background: {INPUT_BG}; color: {TEXT};
+    border: 1px solid {CARD_BORDER}; border-radius: 6px; padding: 5px 8px;
+    selection-background-color: {ACCENT}; selection-color: #06222e;
+}}
+QLineEdit:focus, QPlainTextEdit:focus, QAbstractSpinBox:focus, QComboBox:focus {{
+    border: 1px solid {ACCENT};
+}}
+QLineEdit:disabled, QPlainTextEdit:disabled, QAbstractSpinBox:disabled {{ color: {MUTED}; }}
 """

tests/test_alerts.py

@@ -0,0 +1,38 @@
+"""Tests for the M8 alert monitor (edge-triggered; notify mocked)."""
+
+import unittest
+from unittest import mock
+
+from rigdoctor.core import alerts
+from rigdoctor.core.sample import Reading, Sample
+
+
+def _gpu(temp):
+    return Sample(readings=[Reading("gpu", "temp", temp, "°C")])
+
+
+class AlertTests(unittest.TestCase):
+    @mock.patch.object(alerts, "notify")
+    def test_edge_triggered_no_repeat(self, m):
+        mon = alerts.AlertMonitor(gpu_temp=90.0, cooldown=0.0)
+        mon.check(_gpu(95))   # fires
+        mon.check(_gpu(96))   # still hot — no repeat while active
+        self.assertEqual(m.call_count, 1)
+        mon.check(_gpu(50))   # clears
+        mon.check(_gpu(95))   # hot again — fires
+        self.assertEqual(m.call_count, 2)
+
+    @mock.patch.object(alerts, "notify")
+    def test_no_alert_below_threshold(self, m):
+        alerts.AlertMonitor(gpu_temp=90.0).check(_gpu(70))
+        m.assert_not_called()
+
+    @mock.patch.object(alerts, "notify")
+    def test_gpu_lost(self, m):
+        mon = alerts.AlertMonitor()
+        mon.check(Sample(readings=[Reading("gpu", "status", None, "", "query-timeout")]))
+        m.assert_called_once()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_config.py

@@ -0,0 +1,32 @@
+"""Tests for config save/load (flat TOML writer)."""
+
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+from rigdoctor import config
+
+
+class ConfigTests(unittest.TestCase):
+    def test_save_load_round_trip(self):
+        with tempfile.TemporaryDirectory() as d:
+            cf = Path(d) / "config.toml"
+            with mock.patch.object(config, "CONFIG_FILE", cf), mock.patch.object(config, "CONFIG_DIR", Path(d)):
+                config.save_config({"alerts_enabled": False, "gpu_temp_alert": 88.0, "update_check_minutes": 5})
+                loaded = config.load_config()
+                self.assertIs(loaded["alerts_enabled"], False)
+                self.assertEqual(loaded["gpu_temp_alert"], 88.0)
+                self.assertEqual(loaded["update_check_minutes"], 5)
+
+    def test_update_config_merges_and_keeps_defaults(self):
+        with tempfile.TemporaryDirectory() as d:
+            cf = Path(d) / "config.toml"
+            with mock.patch.object(config, "CONFIG_FILE", cf), mock.patch.object(config, "CONFIG_DIR", Path(d)):
+                config.update_config(cpu_temp_alert=70.0)
+                self.assertEqual(config.load_config()["cpu_temp_alert"], 70.0)
+                self.assertEqual(config.load_config()["gpu_temp_alert"], 90.0)  # default preserved
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_inventory.py

@@ -0,0 +1,30 @@
+"""Tests for the M5 system inventory (render + dict round-trip; collect on real system)."""
+
+import unittest
+
+from rigdoctor.core import inventory
+from rigdoctor.core.inventory import Section
+
+
+class InventoryTests(unittest.TestCase):
+    def test_collect_returns_sections(self):
+        sections = inventory.collect()
+        self.assertTrue(sections)
+        titles = {s.title for s in sections}
+        self.assertIn("System", titles)
+        self.assertIn("CPU", titles)
+
+    def test_dict_round_trip(self):
+        sections = [Section("System", [("Kernel", "7.0.0"), ("Distro", "Ubuntu")])]
+        restored = inventory.from_dict(inventory.to_dict(sections))
+        self.assertEqual(restored[0].title, "System")
+        self.assertEqual(restored[0].items, [("Kernel", "7.0.0"), ("Distro", "Ubuntu")])
+
+    def test_render_markdown(self):
+        md = inventory.render_markdown([Section("CPU", [("Model", "Test CPU")])])
+        self.assertIn("## CPU", md)
+        self.assertIn("- **Model:** Test CPU", md)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_pty_session.py

@@ -0,0 +1,27 @@
+"""Tests for the host PTY session (M12 Tier 3)."""
+
+import time
+import unittest
+
+from rigdoctor.core.pty_session import PtySession
+
+
+class PtySessionTests(unittest.TestCase):
+    def test_runs_command_and_reads_output(self):
+        pty = PtySession(rows=24, cols=80)
+        try:
+            time.sleep(0.4)
+            pty.read()  # drain the shell prompt
+            pty.write(b"echo PTY_MARKER_42\n")
+            deadline = time.time() + 3
+            buf = ""
+            while time.time() < deadline and "PTY_MARKER_42" not in buf:
+                time.sleep(0.1)
+                buf += pty.read().decode(errors="replace")
+            self.assertIn("PTY_MARKER_42", buf)
+        finally:
+            pty.close()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_relay_frames.py

@@ -0,0 +1,38 @@
+"""Tests for M12 relay frames + guest HTML rendering (host/guest data shapes)."""
+
+import json
+import unittest
+
+from rigdoctor.core import share
+from rigdoctor.core.sampler import Sampler
+from rigdoctor.core.sources import available_sources
+
+
+class RelayFrameTests(unittest.TestCase):
+    def setUp(self):
+        self.sampler = Sampler(available_sources())
+
+    def test_full_frame_shape(self):
+        frame = json.loads(share.host_full_frame(self.sampler))
+        self.assertEqual(frame["type"], "full")
+        self.assertIn("groups", frame["snapshot"])
+        self.assertIsInstance(frame["report"], list)
+        self.assertIsInstance(frame["inventory"], dict)
+
+    def test_snapshot_frame_shape(self):
+        frame = json.loads(share.host_snapshot_frame(self.sampler))
+        self.assertEqual(frame["type"], "snapshot")
+        self.assertIn("groups", frame["snapshot"])
+
+    def test_guest_html_renders(self):
+        snap = {"groups": {"gpu": [{"name": "temp", "value": 51.0, "unit": "°C"}]}}
+        report = [{"severity": "ok", "category": "Logs", "title": "No errors"}]
+        inv = {"System": {"Kernel": "7.0.0"}}
+        html = share.guest_html(snap, report, inv)
+        self.assertIn("51.0 °C", html)
+        self.assertIn("No errors", html)
+        self.assertIn("Kernel", html)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_share.py

@@ -0,0 +1,46 @@
+"""Tests for M12 Tier 2 share server: token gating + endpoints."""
+
+import json
+import threading
+import unittest
+import urllib.error
+import urllib.request
+
+from rigdoctor.core import share
+
+
+class ShareServerTests(unittest.TestCase):
+    def setUp(self):
+        self.srv, self.token = share.make_server("127.0.0.1", 0)
+        self.port = self.srv.server_address[1]
+        self.thread = threading.Thread(target=self.srv.serve_forever, daemon=True)
+        self.thread.start()
+
+    def tearDown(self):
+        self.srv.shutdown()
+
+    def _url(self, path, token=None):
+        q = f"?t={token}" if token else ""
+        return f"http://127.0.0.1:{self.port}{path}{q}"
+
+    def test_requires_token(self):
+        with self.assertRaises(urllib.error.HTTPError) as cm:
+            urllib.request.urlopen(self._url("/api/snapshot"), timeout=10)
+        self.assertEqual(cm.exception.code, 403)
+
+    def test_bad_token_rejected(self):
+        with self.assertRaises(urllib.error.HTTPError) as cm:
+            urllib.request.urlopen(self._url("/api/snapshot", "wrong"), timeout=10)
+        self.assertEqual(cm.exception.code, 403)
+
+    def test_snapshot_with_token(self):
+        data = json.load(urllib.request.urlopen(self._url("/api/snapshot", self.token), timeout=10))
+        self.assertIn("groups", data)
+
+    def test_page_served(self):
+        body = urllib.request.urlopen(self._url("/", self.token), timeout=10).read()
+        self.assertIn(b"read-only share", body)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_token.py

@@ -0,0 +1,36 @@
+"""Tests for update-token storage (file fallback + env override), keyring mocked out."""
+
+import os
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+from rigdoctor import config
+
+
+class TokenStorageTests(unittest.TestCase):
+    def test_file_fallback_roundtrip(self):
+        with tempfile.TemporaryDirectory() as d:
+            token_file = Path(d) / "token"
+            with mock.patch.object(config, "_secret_tool", return_value=None), \
+                 mock.patch.object(config, "TOKEN_FILE", token_file), \
+                 mock.patch.dict(os.environ, {}, clear=True):
+                self.assertIsNone(config.load_token())
+                config.save_token("abc123")
+                self.assertEqual(config.load_token(), "abc123")
+                self.assertEqual(config.token_backend(), "file")
+                self.assertEqual(token_file.stat().st_mode & 0o777, 0o600)
+                config.clear_token()
+                self.assertIsNone(config.load_token())
+                self.assertEqual(config.token_backend(), "none")
+
+    def test_env_override_wins(self):
+        with mock.patch.object(config, "_secret_tool", return_value=None), \
+             mock.patch.dict(os.environ, {"RIGDOCTOR_TOKEN": "envtok"}, clear=True):
+            self.assertEqual(config.load_token(), "envtok")
+            self.assertEqual(config.token_backend(), "env")
+
+
+if __name__ == "__main__":
+    unittest.main()