feat: UX enhancements v2.1.0

- Replace Conservative/Aggressive with human-readable cleaning temperament slider
- Add onboarding tooltip on first visit about privacy
- Add 'Works Offline' badge in header
- Enhance ZIP download feedback with file count
- Add persistent settings restoration notification
- Add support snackbar after cleaning (one-time per session)
- Implement WebWorker for cleaning large files (prevents UI freezing)
- Add privacy-friendly analytics (Plausible.io)

Updated app.js to v38

Author: kiku-jw

PLAN.md

@@ -67,4 +67,31 @@ FINAL RELEASE SPRINT
 
 RELEASE COMPLETE - v2.0.0 tagged and pushed
 
+---
+
+## UX ENHANCEMENTS SPRINT (v2.1.0)
+
+12. Human-readable cleaning temperament slider ✅
+    12.1 Replace Conservative/Aggressive radio buttons with range slider (Gentle to Aggressive) ✅
+    12.2 Add visual feedback and tooltips for slider positions ✅
+    12.3 Map slider values to existing cleaning mode logic ✅
+
+13. Onboarding and trust signals ✅
+    13.1 Add first-visit tooltip about privacy (offline, nothing sent) ✅
+    13.2 Add "Works Offline" badge in corner ✅
+    13.3 Enhance persistent settings with restoration notification ✅
+
+14. Performance and feedback ✅
+    14.1 Implement WebWorker for cleaning (prevent UI freezing) ✅
+    14.2 Add ZIP download feedback notification ✅
+    14.3 Add support snackbar after cleaning completion ✅
+
+15. Distribution and tooling
+    15.1 Prepare CLI for Homebrew formula
+    15.2 Prepare CLI for PyPI package
+    15.3 Improve self-test script for release validation
+
+16. Analytics (privacy-friendly) ✅
+    16.1 Add Plausible or Umami analytics (1 line, no cookies) ✅
+
 

WORKLOG.md

@@ -28,4 +28,15 @@
 - Updated app.js version to 35
 - Created GitHub release v2.0.0: https://github.com/kiku-jw/DocStripper/releases/tag/v2.0.0
 
+2025-11-03T02:30:00Z — UX Enhancements Sprint (v2.1.0)
+- Replaced Conservative/Aggressive radio buttons with human-readable cleaning temperament slider (Gentle to Aggressive)
+- Added onboarding tooltip on first visit about privacy (offline, nothing sent)
+- Added "Works Offline" badge in header corner
+- Enhanced ZIP download feedback: shows success message with file count
+- Added persistent settings restoration notification (shows when previous settings are loaded)
+- Added support snackbar after cleaning completion (one-time per session, "Saved you some time? Buy a coffee")
+- Implemented WebWorker for cleaning (prevents UI freezing on long PDFs/files >100KB or >5000 lines)
+- Added privacy-friendly analytics (Plausible.io, no cookies)
+- Updated app.js version to 38
+