feat: M1 companion 資料層與 band 角色行

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

plugins/hud/hooks/companion/node-fs.ts

@@ -0,0 +1,26 @@
+import { mkdir, readdir, readFile, rename, writeFile } from 'node:fs/promises'
+import { dirname } from 'node:path'
+
+import type { Fs } from './fs'
+
+export const nodeFs: Fs = {
+  async read(path) {
+    try {
+      return await readFile(path, 'utf8')
+    } catch {
+      return null
+    }
+  },
+  async write(path, data) {
+    await mkdir(dirname(path), { recursive: true })
+    await writeFile(path, data, 'utf8')
+  },
+  rename,
+  async list(dir) {
+    try {
+      return (await readdir(dir)).filter(n => !n.endsWith('.tmp')).sort()
+    } catch {
+      return []
+    }
+  },
+}