feat: Add comprehensive TUI enhancements with status bar, scanning animation, and version display

Implement three major TUI improvements to enhance user experience:

1. **Unified Status Bar Across All States**
   - Dynamic left/center/right layout with auto-width adjustment
   - State-specific information display (scanning progress, selected items, time tracking)
   - Real-time updates showing session duration and operation time
   - Consistent styling with primary purple color scheme

2. **Animated Scanning Progress**
   - StateScanning phase with package-manager-style loading animation
   - Category-by-category scanning display (✓ Complete, ⠋ Scanning..., ○ Pending)
   - 600ms interval progression through Xcode, Android, Node.js, Flutter
   - Smooth transition to StateSelecting after completion

3. **Version Display in Title**
   - Show application version in TUI title bar
   - Format: "🧹 Mac Dev Cleaner v{version}"
   - Pass version as parameter to avoid import cycles
   - Maintain [DRY-RUN] indicator when applicable

**Technical Implementation:**
- Added Model fields: startTime, deleteStart, scanningCategories, scanComplete, currentScanning, version
- Created renderStatusBar() method handling 5 different states
- Implemented tickScanning() for timed scanning progression
- Fixed import cycle by passing version as parameter through tui.Run()
- Updated both scan.go and clean.go to pass Version parameter

**Status Bar Sections:**
- Left: State indicator (🔍 Scanning, 📋 Select items, ⚠️ Confirm, 🗑️ Deleting, ✅ Done)
- Center: Context info (progress %, selected count, operation status)
- Right: Hints (keyboard shortcuts) or elapsed time

**Files Modified:**
- internal/tui/tui.go: Core TUI enhancements (150+ lines added)
- cmd/root/scan.go: Pass version to tui.Run()
- cmd/root/clean.go: Pass version to tui.Run()

Tested with real Flutter projects: Successfully scanned 21 items (32.4 GB) including 10 Flutter items (7.0 GB)

Author: thanhdevapp

cmd/root/clean.go

@@ -108,7 +108,7 @@ func runClean(cmd *cobra.Command, args []string) {
 
 	// Use TUI or simple mode
 	if useTUI {
-		if err := tui.Run(results, dryRun); err != nil {
+		if err := tui.Run(results, dryRun, Version); err != nil {
 			fmt.Fprintf(os.Stderr, "TUI error: %v\n", err)
 			os.Exit(1)
 		}

cmd/root/scan.go

@@ -98,7 +98,7 @@ func runScan(cmd *cobra.Command, args []string) {
 
 	// Launch TUI by default
 	if scanTUI {
-		if err := tui.Run(results, false); err != nil {
+		if err := tui.Run(results, false, Version); err != nil {
 			fmt.Fprintf(os.Stderr, "Error running TUI: %v\n", err)
 			os.Exit(1)
 		}