fix(gui): readable Environment dropdowns and action buttons — 0.10.1

- Style the QComboBox popup (QAbstractItemView) — it's a separate widget the
  theme didn't cover, so the drop-down list rendered light-on-light.
- Install/Apply finding buttons used PrimaryButton (accent fill + dark text),
  whose fill didn't paint reliably inside the finding cards, leaving dim
  dark-on-dark text. New outlined ActionButton style: bright accent text on the
  dark card, fills accent on hover, with a min-height so the row can't crush it.

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

CHANGELOG.md

@@ -5,6 +5,15 @@ 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).
 
+## [0.10.1] - 2026-05-22
+### Fixed
+- **Environment-page contrast.** The combo-box **drop-down list** was rendering light-on-light
+  (the popup view is a separate widget the theme didn't cover) — now dark with readable text.
+- The **Install / Apply** buttons on findings were hard to read (the accent fill didn't paint
+  reliably inside the finding cards, leaving dim dark-on-dark text). They're now an outlined
+  style — bright accent text on the dark card, filling accent on hover — readable regardless,
+  and given a minimum height so the row can't crush them.
+
 ## [0.10.0] - 2026-05-22
 ### Added
 - **Actionable Environment page (M6) — install & apply, not just advice.** Findings that