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>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "rigdoctor"
-version = "0.7.2"
+version = "0.7.3"
 description = "Modular hardware monitoring & crash diagnostics for Linux gamers."
 readme = "README.md"
 requires-python = ">=3.11"