调整多模态支持

backend-java/src/main/java/com/pharmacopoeia/controller/ChatController.java

@@ -504,9 +504,6 @@ public class ChatController {
                             .subscribe();
                 }, sink::tryEmitError);
     }
-                .doOnError(sink::tryEmitError)
-                .subscribe();
-    }
 
     @GetMapping("/history")
     public ResponseEntity<Map<String, Object>> getHistory(

static/index.html

@@ -107,7 +107,6 @@ body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei
   <button class="nav-btn active" data-tab="chat" onclick="switchTab('chat')">AI 对话</button>
   <button class="nav-btn" data-tab="drugs" onclick="switchTab('drugs')">药品库</button>
 </div>
-<div class="status-bar" style="color:#1976d2">API 模式 — 连接后端知识库</div>
 <div id="tabChat">
   <div class="chat" id="chat"><div class="welcome"><div class="icon">📷💊🎬</div><p>输入药品名称或问题，AI 从药典知识库中检索回答<br><small style="color:#aaa">支持图片/视频上传识别 · 2025版药典为主 · 2020版补充</small></p></div></div>
   <div class="tags"><span class="tag-btn" onclick="quickAsk('布洛芬')">布洛芬</span><span class="tag-btn" onclick="quickAsk('甲硝唑')">甲硝唑</span><span class="tag-btn" onclick="quickAsk('阿莫西林禁忌')">阿莫西林禁忌</span><span class="tag-btn" onclick="quickAsk('布洛芬用法用量')">布洛芬用法用量</span><span class="tag-btn" onclick="quickAsk('二甲双胍不良反应')">二甲双胍不良反应</span><span class="tag-btn" onclick="quickAsk('青霉素过敏处理')">青霉素过敏处理</span></div>