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

ui/src/pages/OrgChart.tsx

@@ -116,17 +116,7 @@ function collectEdges(nodes: LayoutNode[]): Array<{ parent: LayoutNode; child: L
 
 // ── Status dot colors (raw hex for SVG) ─────────────────────────────────
 
-const adapterLabels: Record<string, string> = {
-  claude_local: "Claude",
-  codex_local: "Codex",
-  gemini_local: "Gemini",
-  opencode_local: "OpenCode",
-  cursor: "Cursor",
-  hermes_local: "Hermes",
-  openclaw_gateway: "OpenClaw Gateway",
-  process: "Process",
-  http: "HTTP",
-};
+import { getAdapterLabel } from "../adapters/adapter-display-registry";
 
 const statusDotColor: Record<string, string> = {
   running: "#22d3ee",
@@ -426,7 +416,7 @@ export function OrgChart() {
                   </span>
                   {agent && (
                     <span className="text-[10px] text-muted-foreground/60 font-mono leading-tight mt-1">
-                      {adapterLabels[agent.adapterType] ?? agent.adapterType}
+                      {getAdapterLabel(agent.adapterType)}
                     </span>
                   )}
                   {agent && agent.capabilities && (