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/services/integrations/WindsurfHooksInstaller.ts

@@ -213,11 +213,7 @@ function buildHookCommand(bunPath: string, workerServicePath: string, eventName:
 
   const hookCommand = eventToCommand[eventName] ?? 'observation';
 
-  // Escape backslashes for JSON on Windows
-  const escapedBunPath = bunPath.replace(/\\/g, '\\\\');
-  const escapedWorkerPath = workerServicePath.replace(/\\/g, '\\\\');
-
-  return `"${escapedBunPath}" "${escapedWorkerPath}" hook windsurf ${hookCommand}`;
+  return `"${bunPath}" "${workerServicePath}" hook windsurf ${hookCommand}`;
 }
 
 /**
@@ -240,10 +236,7 @@ function mergeAndWriteHooksJson(
         existingConfig.hooks = {};
       }
     } catch (error) {
-      logger.error('WINDSURF', 'Corrupt hooks.json, starting fresh', {
-        path: WINDSURF_HOOKS_JSON_PATH,
-      }, error as Error);
-      existingConfig = { hooks: {} };
+      throw new Error(`Corrupt hooks.json at ${WINDSURF_HOOKS_JSON_PATH}, refusing to overwrite`);
     }
   }
 
@@ -410,9 +403,7 @@ export function uninstallWindsurfHooks(): number {
           console.log(`  Removed claude-mem entries from hooks.json (other hooks preserved)`);
         }
       } catch (error) {
-        // Corrupt file — just remove it
-        unlinkSync(WINDSURF_HOOKS_JSON_PATH);
-        console.log(`  Removed corrupt hooks.json`);
+        console.log(`  Warning: could not parse hooks.json — leaving file intact to preserve other hooks`);
       }
     } else {
       console.log(`  No hooks.json found`);