Add Coolify REST API server with Scalar docs and UI integration

Express API server on :3100 exposing all Coolify operations:
- CRUD for apps, env vars, servers
- Full upsert pipeline (create/update + env + route + deploy)
- Drift detection, Traefik route management via SSH
- Scalar API docs at /reference, OpenAPI 3.1 spec

UI: New Coolify page with app cards, deploy/delete actions,
env var expansion. Sidebar nav + React Query hooks + fetch client.

Both UI and LLM/CLI use the same HTTP endpoints.

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

api/lib/config.js

@@ -0,0 +1,24 @@
+import { readFileSync, existsSync } from 'fs';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+// Shared config from gitea.repo.management
+const CONFIG_PATH = join(__dirname, '..', '..', '..', 'gitea.repo.management', 'config.json');
+
+let _cached = null;
+
+export function loadConfig() {
+  if (_cached) return _cached;
+  if (!existsSync(CONFIG_PATH)) {
+    throw new Error(`Config not found at ${CONFIG_PATH}`);
+  }
+  _cached = JSON.parse(readFileSync(CONFIG_PATH, 'utf8'));
+  return _cached;
+}
+
+export function reloadConfig() {
+  _cached = null;
+  return loadConfig();
+}