docs: update UI modernization tasks with implementation journey

- Document all approaches tried: Activity-based, ComposeView overlay, lifecycle solutions
- Detail specific issues encountered: positioning, transparency, lifecycle crashes
- Analyze three next-step options with pros/cons
- Record user requirements and current git state for easy resume
- Provide technical deep dive of what worked vs what failed

Ready for next conversation to pick up from Option A, B, or C.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

UI_MODERNIZATION_TASKS.md

@@ -3,11 +3,48 @@
 ## Overview
 This document outlines the planned modernization of the capture mode UI, transforming it from a basic floating button system to a modern, feature-rich interface.
 
-## Current State
-- Basic floating "orb" (actually just a styled Button)
-- Simple expandable menu with 5 options
-- Basic visual state feedback
-- MVC architecture with proper event handling
+## Implementation Journey & Current Status
+
+### ✅ **What We Successfully Implemented**
+- **Decoupled Architecture**: FloatingUIActivity + ScreenCaptureService with Binder communication
+- **Material 3 Compose FAB**: Beautiful, animated FAB with proper Material Design
+- **Expandable Menu**: Smooth animations, haptic feedback, proper Material 3 theming
+- **Service Communication**: Clean Binder-based API for detection commands
+
+### ❌ **Critical Issues Encountered**
+
+#### 1. **Activity-Based Approach Issues**
+- **Problem**: FloatingUIActivity not truly "floating" - positioned like regular activity
+- **Symptom**: Couldn't drag freely, brought up navigation/status bars
+- **User Feedback**: "It's not floating, I can drag it to the left a little but that's it"
+
+#### 2. **ComposeView in Overlay Context**
+- **Problem**: `ViewTreeLifecycleOwner not found` when using ComposeView in WindowManager overlay
+- **Root Cause**: ComposeView requires LifecycleOwner, but overlay context has none
+- **Attempts Made**:
+  - Created custom `OverlayLifecycleOwner` implementing LifecycleOwner + SavedStateRegistryOwner
+  - Tried `ViewTreeLifecycleOwner.set()` - API not available
+  - Tried View.setTag() with lifecycle IDs - didn't work
+  - Simplified approach without explicit lifecycle - still crashed
+
+#### 3. **Transparency & System UI Issues**  
+- **Problem**: Activity showed system bars, wasn't truly transparent
+- **Symptoms**: Navigation bar visible, black status bar, couldn't see underlying apps
+- **Attempts**: Immersive mode, SYSTEM_UI_FLAG_*, WindowInsetsController - partially worked
+
+### 🔄 **Current Architecture State**
+
+```
+MainActivity → ScreenCaptureService → FloatingComposeOverlay (BROKEN)
+                                   ↓
+                              ComposeView + WindowManager (Crashes on lifecycle)
+```
+
+**Files Modified:**
+- `FloatingUIActivity.kt` - Working Compose UI (but not truly floating)
+- `FloatingComposeOverlay.kt` - Crashes due to lifecycle issues
+- `ScreenCaptureService.kt` - Clean service communication
+- `AndroidManifest.xml` - Activity registration with transparent theme
 
 ## Phase 1: Core Modernization ⚡