feat: companion 注入角色語氣，並接上記憶、待辦與主動關心

拆分 cockpit 後 companion 只剩指令與狀態列，沒有任何 hook 把角色
內容送給模型，所以回覆沒有角色感。

- prompt.compose 在 system prompt 尾端加入角色區塊（人設、語氣、心情、
  好感階段、招牌短語、記憶、待辦）
- prompt.submit 以關鍵字更新心情與好感，檢索並寫入互動記憶，附加關心情境
- tool.call 記錄連續失敗；定時 tick 以 toast 提醒到期待辦
- 新增 /companion todo 與 quiet 指令
- 移除未引用的 persona/ 與 nodeFs，測試改成引擎可執行的寫法

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

plugins/companion/hooks/register.tsx

@@ -5,6 +5,12 @@ import { createCompanion } from './companion/core'
 import { engineFs } from './companion/engine-fs'
 
 let companion: ReturnType<typeof createCompanion> | undefined
+let replying = false
+let typedAt = 0
+let timer: { cancel(): void } | undefined
+
+const TICK_MS = 60_000
+const TYPING_MS = 5_000
 
 export const register: Register = on => {
   on('session.start', async ($, e, next) => {
@@ -18,6 +24,15 @@ export const register: Register = on => {
     const first = await companion.ensureActivated()
     if (first.first) $.ui.toast(`已啟用 ${first.name}。用 /companion off 可關閉`)
 
+    // 定時檢查 toast 類關心（到期待辦、作息）；失敗不影響主流程
+    timer?.cancel()
+    timer = $.clock.every(TICK_MS, () => {
+      companion
+        ?.tick({ replying, typing: Date.now() - typedAt < TYPING_MS })
+        .then(cares => cares.forEach(c => $.ui.toast(c.text)))
+        .catch(() => {})
+    })
+
     return next(e)
   })
 
@@ -25,6 +40,49 @@ export const register: Register = on => {
     text: companion ? await companion.command(e.args) : '尚未就緒。',
   }))
 
+  // 角色卡附加在 system prompt 尾端（session 區段），語氣才會進到模型
+  on('prompt.compose', async ($, e, next) => {
+    const result = await next(e)
+    const text = await companion?.prompt()
+    if (!text) return result
+    return { sections: [...result.sections, { id: 'companion:persona', text, scope: 'session' as const }] }
+  })
+
+  on('prompt.submit', async ($, e, next) => {
+    // 更新心情失敗不能擋下使用者的提示
+    const care = (await companion?.onPrompt(e.text).catch(() => [] as string[])) ?? []
+    return next(care.length ? { ...e, context: [...(e.context ?? []), ...care] } : e)
+  })
+
+  on('prompt.edit', async ($, e, next) => {
+    typedAt = Date.now()
+    return next(e)
+  })
+
+  on('turn.start', async ($, e, next) => {
+    replying = true
+    return next(e)
+  })
+
+  on('turn.complete', async ($, e, next) => {
+    replying = false
+    return next(e)
+  })
+
+  // 連續工具失敗會觸發關心，並影響心情
+  on('tool.call', async ($, e, next) => {
+    const r = await next(e)
+    companion?.onToolResult(!r.isError).catch(() => {})
+    return r
+  })
+
+  on('session.end', async ($, e, next) => {
+    timer?.cancel()
+    timer = undefined
+    await companion?.end().catch(() => {})
+    return next(e)
+  })
+
   on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
     const rest = await next(e)
     const view = await companion?.view()