fix: address PR review — shebang, double-escaping, data loss, uninstall scope

- Add shebang banner to NPX CLI esbuild config so npx claude-mem works
- Remove manual backslash pre-escaping in WindsurfHooksInstaller (JSON.stringify handles it)
- Scope cache deletion to claude-mem only, not entire vendor namespace
- Use getWorkerPort() in OpenCodeInstaller instead of hard-coded 37777
- Throw on corrupt JSON in readJsonSafe/readGeminiSettings/Windsurf to prevent data loss
- Fix Cursor install stub to warn instead of silently succeeding
- Fix Gemini uninstall to remove individual hooks within groups, not whole groups
- Update tests for new corrupt-file-throws behavior

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/npx-cli/commands/install.ts

@@ -123,8 +123,7 @@ async function setupIDEs(selectedIDEs: string[]): Promise<void> {
         break;
 
       case 'cursor':
-        log.info('Cursor: hook configuration available after first launch.');
-        log.info(`  Run: npx claude-mem cursor-setup (coming soon)`);
+        log.warn('Cursor: integration not yet implemented. Skipping.');
         break;
 
       case 'gemini-cli': {