Release v4.3.3: Configurable session display and first-time setup UX

Improvements:
- Made session display count configurable (DISPLAY_SESSION_COUNT = 8)
- Added first-time setup detection with helpful user messaging
- Improved UX: First install message clarifies Plugin Hook Error display
- Cleaned up code comments

Technical changes:
- Updated src/hooks/context-hook.ts (configurable session count)
- Updated src/hooks/user-message-hook.ts (first-time setup detection)
- Rebuilt plugin/scripts/context-hook.js
- Rebuilt plugin/scripts/user-message-hook.js
- Bumped version to 4.3.3 in all metadata files

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

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

plugin/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-mem",
-  "version": "4.3.2",
+  "version": "4.3.3",
   "description": "Persistent memory system for Claude Code - seamlessly preserve context across sessions",
   "author": {
     "name": "Alex Newman"