refactor: move default CLAUDE.md template to bundled case-template.md

Replaces the ~400-line inline template string in claude-md.ts with a
file read from src/templates/case-template.md. Removes the hardcoded
/home/arkon/default/CLAUDE.md path from server.ts. The build script
now copies the template to dist/templates/ for production use.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/web/server.ts

@@ -1578,8 +1578,6 @@ export class WebServer extends EventEmitter {
   // Helper to get custom CLAUDE.md template path from settings
   private getDefaultClaudeMdPath(): string | undefined {
     const settingsPath = join(homedir(), '.claudeman', 'settings.json');
-    // Default template path (can be overridden in settings)
-    const defaultPath = '/home/arkon/default/CLAUDE.md';
 
     try {
       if (existsSync(settingsPath)) {
@@ -1589,10 +1587,6 @@ export class WebServer extends EventEmitter {
           return settings.defaultClaudeMdPath;
         }
       }
-      // Use default path if it exists
-      if (existsSync(defaultPath)) {
-        return defaultPath;
-      }
     } catch (err) {
       console.error('Failed to read settings:', err);
     }