feat(adapters): external adapter plugin system with dynamic UI parser

- Plugin loader: install/reload/remove/reinstall external adapters
  from npm packages or local directories
- Plugin store persisted at ~/.paperclip/adapter-plugins.json
- Self-healing UI parser resolution with version caching
- UI: Adapter Manager page, dynamic loader, display registry
  with humanized names for unknown adapter types
- Dev watch: exclude adapter-plugins dir from tsx watcher
  to prevent mid-request server restarts during reinstall
- All consumer fallbacks use getAdapterLabel() for consistent display
- AdapterTypeDropdown uses controlled open state for proper close behavior
- Remove hermes-local from built-in UI (externalized to plugin)
- Add docs for external adapters and UI parser contract

docs/adapters/claude-local.md

@@ -20,8 +20,8 @@ The `claude_local` adapter runs Anthropic's Claude Code CLI locally. It supports
 | `env` | object | No | Environment variables (supports secret refs) |
 | `timeoutSec` | number | No | Process timeout (0 = no timeout) |
 | `graceSec` | number | No | Grace period before force-kill |
-| `maxTurnsPerRun` | number | No | Max agentic turns per heartbeat (defaults to `1000`) |
-| `dangerouslySkipPermissions` | boolean | No | Skip permission prompts (dev only) |
+| `maxTurnsPerRun` | number | No | Max agentic turns per heartbeat (defaults to `300`) |
+| `dangerouslySkipPermissions` | boolean | No | Skip permission prompts (default: `true`); required for headless runs where interactive approval is impossible |
 
 ## Prompt Templates