single source of truth for pi config via ~/.pi/agent

auth.json stores api keys, models.json stores local providers directly.
no more copies, sync layers, or per-user config generation.
docker containers mount pi config read-only.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/servers/api/pi/rest.ts

@@ -1,7 +1,7 @@
 import type { Context } from 'hono';
 import { createRouter } from '../../create-router';
 import * as storage from './storage';
-import { readApiKeys, readLocalProviders } from '../server-settings/pi-mono';
+import { readLocalProviders } from '../server-settings/pi-mono';
 import { readSttConfig } from '../server-settings/stt';
 import { listPiModels } from './list-models';
 import { getHomeDir } from '../../data-path';
@@ -21,8 +21,7 @@ export const piRestRouter = createRouter();
  */
 piRestRouter.get('/pi/models', async (ctx: Context) => {
   try {
-    const storedKeys = await readApiKeys();
-    const models = await listPiModels(storedKeys);
+    const models = await listPiModels();
 
     // Build providerNames map for officer-local-* providers
     const providerNames: Record<string, string> = {};