catlog22 62161c9a16 Refactor Install-Claude.ps1: Replace file-by-file merge with folder replacement ...

**Summary:**
Modified installation logic to backup entire folders, clear destinations, and copy complete directories instead of merging individual files.

**Changes:**
- Added `Backup-AndReplaceDirectory` function for folder-level operations
- Modified `Install-Global` to use folder replacement for .claude, .codex, .gemini, .qwen
- Modified `Install-Path` to use folder replacement for local folders and config directories
- Maintained `Merge-DirectoryContents` for backward compatibility (not used in main flow)

**New Installation Flow:**
1. Backup entire existing directory to timestamped backup folder
2. Clear destination directory completely
3. Copy entire source directory to destination

**Benefits:**
- Faster installation (no file-by-file comparison)
- Cleaner installations (no orphaned files from previous versions)
- Simpler backup/restore process (complete directory snapshots)
- Better handling of renamed/moved files

**Testing:**
✅ Successfully tested Global installation mode
✅ Verified backup creation and folder replacement
✅ Confirmed all directories (.claude, .codex, .gemini, .qwen) installed correctly

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

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

2025-10-11 23:51:18 +08:00

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