feat: Replace DB component tools with filesystem-based user-components/

Components are now .vue files in user-components/<folder>/ parsed at runtime.
Replaces 6 DB MCP tools with 2 (list_fs_components, load_fs_component).
Adds vue-parser, fs-components API, and file watcher for live reload.

server/routes/fs-components.ts

@@ -0,0 +1,24 @@
+import { join } from 'path'
+import { jsonResponse, errorResponse } from '../utils/cors'
+import { USER_COMPONENTS_DIR, WORKING_DIR } from '../config'
+import { listAllComponents, parseComponentFolder } from '../services/vue-parser'
+
+const baseDir = join(WORKING_DIR, USER_COMPONENTS_DIR)
+
+export function handleFsComponents(req: Request) {
+  if (req.method !== 'GET') return null
+
+  const components = listAllComponents(baseDir)
+  return jsonResponse(components)
+}
+
+export function handleFsComponentByName(req: Request, folderName: string) {
+  if (req.method !== 'GET') return null
+
+  const component = parseComponentFolder(baseDir, folderName)
+  if (!component) {
+    return errorResponse(`Component folder "${folderName}" not found or has no .vue file`, 404)
+  }
+
+  return jsonResponse(component)
+}