feat(persona,web): 人格读侧（thinking 三态 + 角色级 mood）+ 面板表单 + mood 播种

按 design/04 §3.2（thinking 语义，showToUser 三态）+ design/01 §2.1 + 主人两条定论（心情跟角色不跟会话；mood 初值走口径 ①：由角色读端点暴露、前端加载播种）。
- 管理侧 GET /admin/personas 的 PersonaSummary 增 thinking（budgetTokens/effort/mode/showToUser）——**showToUser 保持三态**（未配置 ≠ false）
- 用户侧 GET /personas 增**角色级 mood**（取自 emotion 层该角色当前状态，非从消息推断）→ 前端加载播种 currentMood，消除「刷新后心情徽标短暂为空」
- 前端 Personas 页加 thinking 四控件（预算/effort/模式/showToUser 三态）：只做输入校验，**provider 是否真支持由后端 WARN 决定，前端不假装能力**
- 先拆 useAppStore 选择器（原 494/500）到独立模块再做，避免越线
- Docs/api-client 版本号 +1（两处契约 + 三态与角色级 mood 语义）
- 验收：go build/vet/test 全绿 + linux/darwin 交叉编译 + 前端 build 绿 + personaSession/messageSync 逻辑测试通过

frontend/web/src/App.tsx

@@ -16,6 +16,7 @@ import {
 } from "./lib/api";
 import type { SessionMeta } from "./lib/types";
 import { useAppStore } from "./store/useAppStore";
+import { personaMoodSeed } from "./store/personaSelectors";
 
 export default function App(): React.ReactNode {
   // Apply the persisted (dark-first) theme and open the realtime channel only
@@ -23,6 +24,7 @@ export default function App(): React.ReactNode {
   const [route, setRoute] = useState(() => parseAdminHash(window.location.hash));
   const [menuOpen, setMenuOpen] = useState(false);
   const setPersonas = useAppStore((s) => s.setPersonas);
+  const seedMoods = useAppStore((s) => s.seedMoods);
 
   useEffect(() => {
     initTheme();
@@ -37,12 +39,18 @@ export default function App(): React.ReactNode {
 
   // Load the role catalog (design/22 §4.6). The rendered role is no longer one
   // global value: it is derived per active session from this catalog plus that
-  // session's own `personaId` (see useAppStore's selectCurrentPersona), so this
-  // fetch only has to fill the catalog. It must not hinge on a single mount-time
+  // session's own `personaId` (see store/personaSelectors), so this fetch only has
+  // to fill the catalog. It must not hinge on a single mount-time
   // request: a token may appear (login) after mount, or the fetch may transiently
   // fail — in which case the avatar/name would stay on the neutral placeholder. We
   // re-run when the token appears, and retry on failure. The catalog is persisted
   // by useAppStore, so a refresh renders the right role before the fetch returns.
+  //
+  // The catalog also carries each role's *role-level* mood (design/01 §2: emotion
+  // follows the role), which seeds the mood bucket of every role it names — that is
+  // what stops the 心情 badge from flashing empty after a refresh. Seeding merges
+  // (see `seedMoods`): a role the backend reports no mood for is skipped, so a WS
+  // `mood` frame that landed first is never cleared.
   const token = getAuthToken();
   useEffect(() => {
     if (!token) return;
@@ -55,6 +63,7 @@ export default function App(): React.ReactNode {
         .then((list) => {
           if (cancelled) return;
           setPersonas(list);
+          seedMoods(personaMoodSeed(list));
         })
         .catch(() => {
           // Transient failure — retry rather than leaving the placeholder forever.
@@ -67,7 +76,7 @@ export default function App(): React.ReactNode {
       cancelled = true;
       if (retry !== null) window.clearTimeout(retry);
     };
-  }, [token, setPersonas]);
+  }, [token, setPersonas, seedMoods]);
 
   const sessions = useAppStore((s) => s.sessions);
   const activeSessionId = useAppStore((s) => s.activeSessionId);