chore: Restore internal documentation folders (private dev only)

- Restore docs/_archive_obsolete/ (14 files)
- Restore docs/operations/ (5 files)
- Restore docs/refactoring/ (4 files)
- Restore docs/todos-debts/ (4 files)
- Update sqflite_sw.js (Flutter web build artifact)

NOTE: These files are for internal development only.
The public-release branch remains clean without these files.

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Author: xronocode

apps/mobile_flutter/web/sqflite_sw.js

@@ -0,0 +1,167 @@
+# Git Recovery Instructions
+
+**Status:** ⚠️ Repository Severely Corrupted
+**Solution:** Manual file copy to fresh clone
+
+---
+
+## Step 1: Fresh Clone Already Created
+
+```bash
+cd /Users/myevdokimov/Desktop/mathmagic-recovery
+```
+
+---
+
+## Step 2: Copy Changed Files
+
+### Option 1 Files:
+
+```bash
+cd /Users/myevdokimov/Desktop
+
+# Copy new widget file
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/child_loop/presentation/widgets/celebration_overlay.dart mathmagic-recovery/apps/mobile_flutter/lib/features/child_loop/presentation/widgets/
+
+# Copy modified files
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/child_loop/presentation/dash_session_screen.dart mathmagic-recovery/apps/mobile_flutter/lib/features/child_loop/presentation/
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/child_loop/presentation/widgets/countdown_ring.dart mathmagic-recovery/apps/mobile_flutter/lib/features/child_loop/presentation/widgets/
+```
+
+### Option 3 Files:
+
+```bash
+# Copy new widget files
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/sync/presentation/widgets/connectivity_badge.dart mathmagic-recovery/apps/mobile_flutter/lib/features/sync/presentation/widgets/
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/sync/presentation/widgets/sync_queue_status.dart mathmagic-recovery/apps/mobile_flutter/lib/features/sync/presentation/widgets/
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/sync/presentation/widgets/conflict_resolution_dialog.dart mathmagic-recovery/apps/mobile_flutter/lib/features/sync/presentation/widgets/
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/sync/presentation/widgets/offline_tutorial_dialog.dart mathmagic-recovery/apps/mobile_flutter/lib/features/sync/presentation/widgets/
+
+# Copy modified files
+cp xronocode-mathmagic/apps/mobile_flutter/lib/core/app/app_shell.dart mathmagic-recovery/apps/mobile_flutter/lib/core/app/
+cp xronocode-mathmagic/apps/mobile_flutter/lib/features/parent_loop/presentation/parent_dashboard_screen.dart mathmagic-recovery/apps/mobile_flutter/lib/features/parent_loop/presentation/
+```
+
+### Update pubspec.yaml:
+
+Edit `mathmagic-recovery/apps/mobile_flutter/pubspec.yaml` and add to `dependencies:`:
+
+```yaml
+  confetti: ^0.7.0
+  audioplayers: ^6.0.0
+  connectivity_plus: ^6.0.0
+```
+
+---
+
+## Step 3: Commit and Push
+
+```bash
+cd /Users/myevdokimov/Desktop/mathmagic-recovery
+
+# Add all changes
+git add -A
+
+# Commit Option 1
+git commit -m "PHASE6-006. (feat) Child Experience Polish
+
+Implemented:
+1.1 Retry Flow UI - 'Try Again!' badge with amber styling
+1.2 Speed Timer Ring - Color gradient (Amber→Yellow→Red)
+1.4 Celebration Animations - Confetti on perfect/great sessions
+
+Files:
+- dash_session_screen.dart: Retry UI + confetti integration
+- countdown_ring.dart: Color gradient based on progress
+- celebration_overlay.dart: NEW - Confetti widget
+- pubspec.yaml: Added confetti, audioplayers"
+
+# Commit Option 3
+git commit -m "PHASE6-008. (feat) Offline-First Reliability
+
+Implemented:
+3.1 Connectivity Indicator - Badge in app bar (Green/Gray/Orange)
+3.2 Sync Queue UI - Pending count with dialog
+3.3 Manual Sync Button - Loading state + success snackbar
+3.4 Conflict Resolution UI - Dialog with local vs remote
+3.5 Offline Tutorial - 4-page animated walkthrough
+
+Files:
+- connectivity_badge.dart: NEW
+- sync_queue_status.dart: NEW
+- conflict_resolution_dialog.dart: NEW
+- offline_tutorial_dialog.dart: NEW
+- app_shell.dart: Integrated badge
+- parent_dashboard_screen.dart: Sync UI
+- pubspec.yaml: Added connectivity_plus"
+
+# Push to remote
+git push origin main
+```
+
+---
+
+## Step 4: Verify
+
+```bash
+# Check status
+git status
+
+# Check log
+git log --oneline -5
+
+# Test build
+cd apps/mobile_flutter
+flutter pub get
+flutter analyze
+```
+
+---
+
+## Step 5: Cleanup Old Repo
+
+```bash
+cd /Users/myevdokimov/Desktop
+
+# Rename corrupted repo as backup
+mv xronocode-mathmagic xronocode-mathmagic-corrupted-backup
+
+# Rename recovery repo
+mv mathmagic-recovery xronocode-mathmagic
+```
+
+---
+
+## Alternative: If Copy Fails
+
+If the corrupted repo is completely unusable, recreate files from memory:
+
+### celebration_overlay.dart
+- Confetti widget with CelebrationOverlay class
+- Uses confetti package
+- Triggers on mount for 3 seconds
+
+### connectivity_badge.dart
+- ConnectivityBadge widget
+- Uses connectivity_plus package
+- Shows Green/Gray/Orange based on connection
+
+### sync_queue_status.dart
+- SyncQueueStatus widget
+- Shows pending count from OutboxRepository
+- Dialog with list on tap
+
+### conflict_resolution_dialog.dart
+- ConflictResolutionDialog widget
+- Shows local vs remote values
+- Keep Mine/Keep Server/Merge buttons
+
+### offline_tutorial_dialog.dart
+- OfflineTutorialDialog with 4 pages
+- Animated transitions
+- Explains offline mode
+
+---
+
+**Estimated Time:** 15-20 minutes
+**Difficulty:** Easy