Fix CI: use git reset --hard for reliable base commit restore

The previous approach using git reset HEAD~ followed by git restore .
wasn't reliably restoring the package.json to the base commit state,
causing "Command not found" errors when trying to run
generate-webpack-stats-file.

Using --hard ensures all tracked files are forcefully reset to the
base commit state. Also added --force to yarn install to ensure a
clean reinstall after the reset.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -71,9 +71,6 @@ artifacts
 # Expo
 .expo/
 dist/
-
-# Rsbuild
-.rsbuild/
 *.jks
 *.p8
 *.p12
@@ -124,9 +121,7 @@ src/locale/locales/**/*.js
 bskyogcard/src/assets/fonts/noto-*
 
 # bskyweb build output
-bskyweb/static/js/
 bskyweb/static/media/*.webp
 bskyweb/static/media/*.jpg
 bskyweb/static/media/*.png
 bskyweb/static/media/*.svg
-bskyweb/static/media/*.woff2