feat: standardize input styling with tier system, add depth and admin features

- Define 4 input tier CSS classes (input-standard, input-search, input-embedded, input-danger)
  in globals.css, migrating ~50 inputs across ~28 component files to use them
- Add subtle border and inset shadow to solid input tiers for resting-state visibility
- Fix focus ring clipping in settings panel scroll container
- Fix phantom Tailwind tokens (border-border-primary, placeholder-txt-muted)
- Add admin user management panel, storage management, and account deletion utilities

packages/server/src/index.ts

@@ -22,6 +22,7 @@ import { utilRoutes } from './routes/utils.js';
 import { instanceRoutes } from './routes/instance.js';
 import { exploreRoutes } from './routes/explore.js';
 import { searchRoutes } from './routes/search.js';
+import { adminRoutes } from './routes/admin.js';
 import { registerWebSocket } from './ws/handler.js';
 import path from 'path';
 import fs from 'fs';
@@ -88,6 +89,7 @@ async function main(): Promise<void> {
   await app.register(instanceRoutes);
   await app.register(exploreRoutes);
   await app.register(searchRoutes);
+  await app.register(adminRoutes);
   await app.register(registerWebSocket);
 
   app.get('/api/health', async () => {