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/scripts/user-message-hook.js

@@ -1,7 +1,25 @@
 #!/usr/bin/env node
-import{execSync as e}from"child_process";import{join as r}from"path";import{homedir as n}from"os";try{let o=r(n(),".claude","plugins","marketplaces","thedotmack","plugin","scripts","context-hook.js"),t=e(`node "${o}" --colors`,{encoding:"utf8"});console.error(`
+import{execSync as r}from"child_process";import{join as o}from"path";import{homedir as t}from"os";import{existsSync as s}from"fs";var i=o(t(),".claude","plugins","marketplaces","thedotmack"),a=o(i,"node_modules");s(a)||(console.error(`
+---
+\u{1F389}  Note: This appears under Plugin Hook Error, but it's not an error. That's the only option for 
+   user messages in Claude Code UI until a better method is provided.
+---
+
+\u26A0\uFE0F  Claude-Mem: First-Time Setup
+
+Dependencies have been installed in the background. This only happens once.
+
+\u{1F4A1} TIPS:
+   \u2022 Memories will start generating while you work
+   \u2022 Use /init to write or update your CLAUDE.md for better project context
+   \u2022 Try /clear after one session to see what context looks like
+
+Thank you for installing Claude-Mem!
+
+This message was not added to your startup context, so you can continue working as normal.
+`),process.exit(3));try{let e=o(t(),".claude","plugins","marketplaces","thedotmack","plugin","scripts","context-hook.js"),n=r(`node "${e}" --colors`,{encoding:"utf8"});console.error(`
 
 \u{1F4DD} Claude-Mem Context Loaded
    \u2139\uFE0F  Note: This appears as stderr but is informational only
 
-`+t)}catch(o){console.error(`\u274C Failed to load context display: ${o}`)}process.exit(3);
+`+n)}catch(e){console.error(`\u274C Failed to load context display: ${e}`)}process.exit(3);