🔧 fix(chat): update schema for Better Auth nanoid user IDs

- Change userId columns from uuid to text to support Better Auth's nanoid format
- Update conversations, spaces, space_members, templates, usage_logs schemas
- Fix web API endpoint path from /api to /api/v1

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/chat/apps/web/src/lib/services/api.ts

@@ -58,7 +58,7 @@ async function fetchApi<T>(
 	}
 
 	try {
-		const response = await fetch(`${API_BASE}/api${endpoint}`, {
+		const response = await fetch(`${API_BASE}/api/v1${endpoint}`, {
 			method,
 			headers: {
 				'Content-Type': 'application/json',