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>

src/hooks/user-message-hook.ts

@@ -9,6 +9,35 @@
 import { execSync } from "child_process";
 import { join } from "path";
 import { homedir } from "os";
+import { existsSync } from "fs";
+
+// Check if node_modules exists - if not, this is first run
+const pluginDir = join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack');
+const nodeModulesPath = join(pluginDir, 'node_modules');
+
+if (!existsSync(nodeModulesPath)) {
+  // First-time installation - dependencies not yet installed
+  console.error(`
+---
+🎉  Note: This appears under Plugin Hook Error, but it's not an error. That's the only option for 
+   user messages in Claude Code UI until a better method is provided.
+---
+
+⚠️  Claude-Mem: First-Time Setup
+
+Dependencies have been installed in the background. This only happens once.
+
+💡 TIPS:
+   • Memories will start generating while you work
+   • Use /init to write or update your CLAUDE.md for better project context
+   • Try /clear after one session to see what context looks like
+
+Thank you for installing Claude-Mem!
+
+This message was not added to your startup context, so you can continue working as normal.
+`);
+  process.exit(3);
+}
 
 try {
   // Cross-platform path to context-hook.js in the installed plugin