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/store/useAppStore.ts

@@ -13,7 +13,6 @@ import type {
   ToolUsed,
   WsStatus,
 } from "../lib/types";
-import { resolveSessionPersona } from "../lib/persona";
 import { now, uid } from "../lib/util";
 
 interface ChatContext {
@@ -37,7 +36,8 @@ export interface AppStore {
    *  persona-scoped and carries no `sessionId`, so each role gets its own bucket
    *  and the UI shows the bucket of the *active session's* role — role X's mood
    *  must not sit above role Y's conversation. `""` holds events that arrived
-   *  without a persona (legacy/unscoped frames). */
+   *  without a persona (legacy/unscoped frames). Seeded from the role catalog's
+   *  role-level mood on load (`seedMoods` + `personaMoodSeed`). */
   moods: Record<string, string>;
   context: ChatContext;
   agents: AgentInfo[];
@@ -72,6 +72,12 @@ export interface AppStore {
   /** Record one role's new mood. `personaId` is the role the event named; "" keeps
    *  an unscoped/legacy frame in its own bucket. A null mood drops the bucket. */
   setMood: (mood: string | null, personaId?: string) => void;
+  /** Merge role-level moods read from `GET /personas` into the buckets (design/01
+   *  §2: mood follows the role, so the catalog is an authoritative seed). Values
+   *  already known are overwritten by the server's truth; buckets the seed does
+   *  not mention are left alone, so a WS frame that arrived first is never
+   *  cleared. Build the seed with `personaMoodSeed`. */
+  seedMoods: (seed: Record<string, string>) => void;
 
   /** Replace the session metadata list. */
   setSessions: (list: SessionMeta[]) => void;
@@ -166,6 +172,8 @@ export const useAppStore = create<AppStore>()(
           else delete moods[personaId];
           return { moods };
         }),
+      seedMoods: (seed) =>
+        set((s) => (Object.keys(seed).length ? { moods: { ...s.moods, ...seed } } : s)),
 
       setSessions: (list) =>
         set({
@@ -450,26 +458,6 @@ export const useAppStore = create<AppStore>()(
   )
 );
 
-/** The role the UI renders (design/22 §4.6): the active session's bound role,
- *  else the global default. THE single resolution point — the avatar, name,
- *  wallpaper, mood bucket and message labels all read it, so none of them can
- *  disagree about "who is speaking" (design/22 §5 risk row 1). */
-export function selectCurrentPersona(s: AppStore): PersonaRecord | null {
-  return resolveSessionPersona(s.activeSessionId, s.sessions, s.personas);
-}
-
-/** Subscribe to the active session's role. */
-export function useCurrentPersona(): PersonaRecord | null {
-  return useAppStore(selectCurrentPersona);
-}
-
-/** Subscribe to the active role's mood. `mood` frames are role-scoped and carry
- *  no sessionId, so a role's mood is only shown above its own sessions. */
-export function useCurrentMood(): string | null {
-  const personaId = useAppStore((s) => selectCurrentPersona(s)?.id ?? "");
-  return useAppStore((s) => (personaId ? s.moods[personaId] ?? null : null));
-}
-
 /** Convenience selector for the last streaming assistant message id. */
 export function lastStreamingMessage(s: AppStore): ChatMessage | undefined {
   const last = s.messages[s.messages.length - 1];