fix: Hide console window on Windows when spawning child processes (#166)

* fix: Hide console window on Windows when spawning child processes

Add windowsHide: true to spawnSync and execSync calls to prevent
empty console windows from appearing on Windows when hooks execute.

Fixes two spawn points:
- worker-utils.ts: PM2 spawn when starting worker service
- user-message-hook.ts: Node spawn for context display

Reference: https://nodejs.org/api/child_process.html (windowsHide option)

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

* fix: Add windowsHide to remaining execSync calls for complete Windows console window hiding

This completes the Windows console window fix by adding `windowsHide: true` to all remaining `execSync` calls:

- src/services/worker-service.ts:220 - pgrep command for orphaned process detection
- src/services/worker-service.ts:226 - pkill command for process cleanup
- src/services/worker/SDKAgent.ts:414 - where/which claude command for finding executable

These operations are less frequent than the user-prompt hook, but should still avoid spawning console windows on Windows for a complete fix.

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

Co-authored-by: Alex Newman <thedotmack@users.noreply.github.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Alex Newman <thedotmack@users.noreply.github.com>

src/services/worker-service.ts

@@ -217,13 +217,13 @@ export class WorkerService {
 
       // Find orphaned uvx processes (which spawn chroma servers)
       try {
-        const processes = execSync('pgrep -fl uvx', { encoding: 'utf-8', stdio: 'pipe' }).trim();
+        const processes = execSync('pgrep -fl uvx', { encoding: 'utf-8', stdio: 'pipe', windowsHide: true }).trim();
         if (processes) {
           const processCount = processes.split('\n').length;
           logger.info('WORKER', 'Cleaning up orphaned MCP processes', { count: processCount });
 
           // Kill the processes
-          execSync('pkill -f uvx', { stdio: 'pipe' });
+          execSync('pkill -f uvx', { stdio: 'pipe', windowsHide: true });
           logger.success('WORKER', `Cleaned up ${processCount} orphaned MCP server processes`);
         }
       } catch (error: any) {