fix(auth): OpenAI 端 key 也走 DB,setup 是单一配置入口

修 M2/M3 遗漏:OPENAI_TTS_API_KEY (admin + 合成鉴权) 此前只能从 env
读,setup 前端没收集。装完用户还要回去设 env,体验断,违反
'setup 是单一配置源' 承诺。

改动:
- setting/config.go: LoadRuntimeConfig 顺便把 auth_key 灌到
  setting.Auth.APIKeys。优先级 DB > env(env 仅作 fallback,首次启
  动无 DB 时仍可用,向后兼容)。
- controller/setup.go: validateSetupSettings 加 auth_key 为必填,
  写 DB 后立即 setting.Auth.APIKeys = [auth_key](本进程内立刻生效)。
- controller/settings.go: GET /api/settings 返 auth_key (打码) +
  auth_key_set;新增 SettingsAuthKeyHandler (PUT /api/settings/auth-key),
  改完单独刷新 setting.Auth.APIKeys(避免被自踢,只下次请求生效)。
- router/router.go: 挂 /api/settings/auth-key 路由。
- router/setup.html: 加 OpenAI 鉴权 Key 字段(密码框,带提示);
  表单 default + submit 都加 auth_key。
- router/admin.html: 设置 tab 拆两张卡 — 鉴权 Key(独立保存按钮,
  改完会自踢当前会话)+ 火山 TTS 凭证;vue setup 加 authKeyInput +
  saveAuthKey 函数。
- main.go: 把 LoadRuntimeConfig(st) 提到 LogStartupSummary 之前,
  让启动日志反映真实运行时状态(DB 已加载的 key 数量)而不是
  过时的 env 状态。

未 push(等用户当前 M3 测完一起或单独)

router/admin.html

@@ -228,8 +228,21 @@
             <!-- Settings -->
             <div v-if="tab==='settings'">
                 <div class="card">
-                    <div class="card-title">火山 TTS 凭证</div>
-                    <div class="card-desc" style="color: var(--text-dim); font-size: 12px; margin-bottom: 16px;">改完点保存,立即生效,无需重启服务。</div>
+                    <div class="card-title">鉴权 Key (登录 + 客户端调用)</div>
+                    <div class="card-desc" style="color: var(--text-dim); font-size: 12px; margin-bottom: 16px;">客户端用这个 Key 调 <code>/v1/audio/speech</code>,也是登录 <code>/admin</code> 的密码。改完下一次请求立即生效(改完会被当前会话自踢,需重新登录)。</div>
+                    <div class="field">
+                        <label>当前 Key (打码: <span style="color: var(--accent); font-family: monospace;">{{ settings.auth_key || '(未设置)' }}</span>)</label>
+                        <div style="display: flex; gap: 8px;">
+                            <input type="password" v-model="authKeyInput" :placeholder="settings.auth_key_set ? '不改留空' : '输入新 Key'" style="flex: 1;">
+                            <button class="btn btn-primary" @click="saveAuthKey" :disabled="!authKeyInput">更新 Key</button>
+                        </div>
+                        <div class="hint">独立端点 /api/settings/auth-key。改了之后,你的浏览器 401 自动跳回登录页,用新 Key 重登。</div>
+                    </div>
+                </div>
+
+                <div class="card">
+                    <div class="card-title">火山 TTS 上游凭证</div>
+                    <div class="card-desc" style="color: var(--text-dim); font-size: 12px; margin-bottom: 16px;">调火山 v3 上游用的凭证。改完点保存,立即生效,无需重启服务。</div>
 
                     <div class="field">
                         <label>API Key (打码显示: <span style="color: var(--accent); font-family: monospace;">{{ settings.api_key || '(未设置)' }}</span>)</label>
@@ -331,6 +344,7 @@
             const settings = ref({});
             const settingsForm = ref({ default_resource_id: '', default_speaker: '', default_format: 'mp3', sample_rate: 24000, model: '' });
             const apiKeyInput = ref('');
+            const authKeyInput = ref('');
             const savingSettings = ref(false);
             const settingsErr = ref('');
             const settingsOk = ref(false);
@@ -422,6 +436,23 @@
                     settingsErr.value = e.response?.data?.error?.message || e.message;
                 }
             };
+            const saveAuthKey = async () => {
+                settingsErr.value = ''; settingsOk.value = false;
+                if (!authKeyInput.value) { settingsErr.value = 'Auth Key 不能为空'; return; }
+                try {
+                    await http.put('/settings/auth-key', { auth_key: authKeyInput.value });
+                    authKeyInput.value = '';
+                    // 改完自己会 401,清掉 session key 让用户重新登录
+                    setTimeout(() => {
+                        sessionStorage.removeItem('ttsAdminKey');
+                        apiKey.value = '';
+                    }, 200);
+                    settingsOk.value = true;
+                    setTimeout(() => settingsOk.value = false, 3000);
+                } catch (e) {
+                    settingsErr.value = e.response?.data?.error?.message || e.message;
+                }
+            };
             const resetSettingsForm = () => { loadSettings(); };
 
             const openAdd = () => {
@@ -466,8 +497,8 @@
 
             return { apiKey, keyInput, loginErr, login, logout, tab, overview, voices, actionErr,
                 showAdd, form, addErr, adding, openAdd, submitAdd, toggle, remove,
-                settings, settingsForm, apiKeyInput, savingSettings, settingsErr, settingsOk,
-                loadSettings, saveSettings, saveApiKey, resetSettingsForm,
+                settings, settingsForm, apiKeyInput, authKeyInput, savingSettings, settingsErr, settingsOk,
+                loadSettings, saveSettings, saveApiKey, saveAuthKey, resetSettingsForm,
                 formatUptime, shortPath, reloadAll };
         },
     }).mount('#app');

router/router.go

@@ -84,6 +84,7 @@ func Setup() *mux.Router {
 	r.Handle("/api/settings", middleware.RequireAdmin(http.HandlerFunc(controller.SettingsGetHandler))).Methods("GET")
 	r.Handle("/api/settings", middleware.RequireAdmin(http.HandlerFunc(controller.SettingsUpdateHandler))).Methods("PUT")
 	r.Handle("/api/settings/api-key", middleware.RequireAdmin(http.HandlerFunc(controller.SettingsAPIKeyHandler))).Methods("PUT")
+	r.Handle("/api/settings/auth-key", middleware.RequireAdmin(http.HandlerFunc(controller.SettingsAuthKeyHandler))).Methods("PUT")
 
 	// 业务路由
 	r.HandleFunc("/v1/audio/speech", controller.OpenaiTTSHandler).Methods("POST", "OPTIONS")

router/setup.html

@@ -96,11 +96,17 @@
         <div v-if="errorMsg" class="banner">⚠ {{ errorMsg }}</div>
 
         <div class="card">
-            <div class="card-title">火山引擎 TTS 凭证</div>
-            <div class="card-desc">从火山引擎控制台获取,API Key 仅在此页面输入,不会回显。</div>
+            <div class="card-title">OpenAI 鉴权 + 火山引擎 TTS 凭证</div>
+            <div class="card-desc">从控制台/面板获取。两个 Key 仅在此页面输入,不会回显,装完不用再碰 env。</div>
             <div class="field">
-                <label>API Key <span class="req">*</span></label>
+                <label>OpenAI 鉴权 Key <span class="req">*</span></label>
+                <input type="password" v-model="form.auth_key" placeholder="自定,例如 my-secret-key-2024" autocomplete="off">
+                <div class="hint">客户端用这个 Key 调 <code>/v1/audio/speech</code>,也是登录 <code>/admin</code> 的密码。装完可在 <code>/admin → 设置</code> 改。</div>
+            </div>
+            <div class="field">
+                <label>火山 TTS API Key <span class="req">*</span></label>
                 <input type="password" v-model="form.api_key" placeholder="例如: 5b4d7c2a-..." autocomplete="off">
+                <div class="hint">调火山 v3 上游用的凭证,从 <a href="https://console.volcengine.com/" target="_blank">火山控制台</a> 获取。</div>
             </div>
             <div class="field-row">
                 <div class="field">
@@ -166,6 +172,7 @@
     createApp({
         setup() {
             const form = ref({
+                auth_key: '',
                 api_key: '',
                 default_resource_id: 'volc.megatts.default',
                 default_speaker: '',
@@ -200,8 +207,8 @@
 
             const submit = async () => {
                 errorMsg.value = '';
-                if (!form.value.api_key || !form.value.default_resource_id || !form.value.default_speaker || !form.value.token) {
-                    errorMsg.value = '请填写所有必填项(API Key / 资源 ID / 默认音色 / Token)';
+                if (!form.value.auth_key || !form.value.api_key || !form.value.default_resource_id || !form.value.default_speaker || !form.value.token) {
+                    errorMsg.value = '请填写所有必填项(OpenAI Key / 火山 API Key / 资源 ID / 默认音色 / Token)';
                     return;
                 }
                 if (!form.value.voices.length || form.value.voices.some(v => !v.name || !v.speaker || !v.resource_id)) {
@@ -213,6 +220,7 @@
                     const r = await axios.post('/api/setup', {
                         token: form.value.token,
                         settings: {
+                            auth_key: form.value.auth_key,
                             api_key: form.value.api_key,
                             default_resource_id: form.value.default_resource_id,
                             default_speaker: form.value.default_speaker,