fix: 修复19个Bug (P0-P3) — 持续性调试第7轮发现的问题

P0 (5): crypto/rand session ID, TTS fallback可达性, goroutine defer recover, adminAuth前缀修正
P1 (5): 普通用户密码验证, context传递, priority clamp, 超时重试, 自主思考速率限制
P2 (4): Briefing AI降级, 前端消息类型渲染, Docker Compose补全, PWA 192图标
P3 (5): goroutine错误处理, .gitignore完善, reminder created_at, voice Dockerfile, Go版本更新

frontend/web/src/components/chat/MessageBubble.tsx

@@ -2,7 +2,7 @@ import { useState, useEffect, useRef, useCallback } from 'react';
 import { CyreneAvatar } from '@/components/persona/CyreneAvatar';
 import { useAuthStore } from '@/store/authStore';
 import { useSpeechSynthesis } from '@/hooks/useSpeechSynthesis';
-import type { MessageAttachment } from '@/types/chat';
+import type { MessageAttachment, MultiMessageItem, StreamSegment } from '@/types/chat';
 import { ImageLightbox } from './ImageLightbox';
 
 interface MessageBubbleProps {
@@ -11,6 +11,8 @@ interface MessageBubbleProps {
   timestamp: number;
   isStreaming?: boolean;
   attachments?: MessageAttachment[];
+  multiMessages?: MultiMessageItem[];
+  streamSegments?: StreamSegment[];
 }
 
 /**
@@ -137,7 +139,7 @@ function AIMessageActions({ content }: { content: string }) {
   );
 }
 
-export function MessageBubble({ role, content, timestamp, isStreaming, attachments }: MessageBubbleProps) {
+export function MessageBubble({ role, content, timestamp, isStreaming, attachments, multiMessages, streamSegments }: MessageBubbleProps) {
   const isUser = role === 'user';
   const [lightboxIndex, setLightboxIndex] = useState<number | null>(null);
   const time = new Date(timestamp).toLocaleTimeString('zh-CN', {
@@ -172,13 +174,43 @@ export function MessageBubble({ role, content, timestamp, isStreaming, attachmen
           ${isStreaming ? 'message-streaming' : ''}
         `}
       >
-        <p className="whitespace-pre-wrap break-words">
-          {isStreaming ? displayedContent : content}
-          {/* 流式消息末尾闪烁光标 — 用独立 span 避免 ::after 在隐藏字符后错位 */}
-          {hasMoreChars && (
-            <span className="animate-streaming-cursor" />
-          )}
-        </p>
+
+        {/* 多段消息渲染 (multi_message 类型) */}
+        {multiMessages && multiMessages.length > 0 && !isStreaming && (
+          <div className="space-y-2">
+            {multiMessages
+              .sort((a, b) => a.index - b.index)
+              .map((item) => (
+                <p key={item.index} className="whitespace-pre-wrap break-words">
+                  {item.content}
+                </p>
+              ))}
+          </div>
+        )}
+
+        {/* 流式片段渲染 (stream_segments 类型) */}
+        {streamSegments && streamSegments.length > 0 && !isStreaming && (
+          <div className="space-y-1.5">
+            {streamSegments
+              .sort((a, b) => a.index - b.index)
+              .map((seg) => (
+                <p key={seg.index} className="whitespace-pre-wrap break-words text-gray-600 dark:text-gray-400">
+                  {seg.text}
+                </p>
+              ))}
+          </div>
+        )}
+
+        {/* 普通文本 / 流式文本 */}
+        {(!multiMessages || multiMessages.length === 0) && (!streamSegments || streamSegments.length === 0) && (
+          <p className="whitespace-pre-wrap break-words">
+            {isStreaming ? displayedContent : content}
+            {/* 流式消息末尾闪烁光标 — 用独立 span 避免 ::after 在隐藏字符后错位 */}
+            {hasMoreChars && (
+              <span className="animate-streaming-cursor" />
+            )}
+          </p>
+        )}
 
         {/* 图片附件网格 */}
         {!isStreaming && imageAttachments.length > 0 && (

frontend/web/src/components/chat/MessageList.tsx

@@ -36,6 +36,8 @@ export function MessageList({ messages, isTyping }: MessageListProps) {
           timestamp={msg.timestamp}
           isStreaming={msg.isStreaming}
           attachments={msg.attachments}
+          multiMessages={(msg as any).multiMessages}
+          streamSegments={(msg as any).streamSegments}
         />
       ))}
       {isTyping && !messages.some((m) => m.isStreaming) && <TypingIndicator />}

frontend/web/src/components/layout/BriefingPanel.tsx

@@ -306,6 +306,11 @@ function BriefingCard({ briefing }: { briefing: Briefing }) {
             <h4 className="text-xs font-semibold text-purple-600 dark:text-purple-400">
               昔涟的每日问候
             </h4>
+            {briefing.summary_source === 'fallback' && (
+              <span className="text-[10px] px-1.5 py-0.5 rounded-full bg-amber-100 text-amber-600 dark:bg-amber-900/30 dark:text-amber-400">
+                本地生成
+              </span>
+            )}
           </div>
           <p className="text-xs text-gray-600 dark:text-gray-400 leading-relaxed whitespace-pre-wrap">
             {briefing.summary}