fix: address 10 unresolved PR review threads

- README: add language specifier to fenced code block
- paths.ts: guard npmPackageRootDirectory() against bundle structure drift
- OpenCodeInstaller: resolve bundle from import.meta.url, not process.cwd()
- OpenCodeInstaller: log warnings on AGENTS.md injection failures
- WindsurfHooksInstaller: key registry by full workspace path, not basename
- uninstall.ts: poll health endpoint to wait for worker exit before file deletion
- uninstall.ts: call IDE-specific uninstallers (Gemini, Windsurf, OpenCode, OpenClaw, Codex)
- opencode-plugin: cap session tracking Map at 1000 entries with LRU eviction
- GeminiCliHooksInstaller: document intentional JSON double-escaping

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

src/services/integrations/GeminiCliHooksInstaller.ts

@@ -119,7 +119,10 @@ function buildHookCommand(
     throw new Error(`Unknown Gemini CLI event: ${geminiEventName}`);
   }
 
-  // Escape backslashes for JSON compatibility on Windows
+  // Double-escape backslashes intentionally: this command string is embedded inside
+  // a JSON value, so `\\` in the source becomes `\` when the JSON is parsed by the
+  // IDE. Without double-escaping, Windows paths like C:\Users would lose their
+  // backslashes and break when the IDE deserializes the hook configuration.
   const escapedBunPath = bunPath.replace(/\\/g, '\\\\');
   const escapedWorkerPath = workerServicePath.replace(/\\/g, '\\\\');