fix: remove duplicate + New button, keep only + New Session

- Removed + New button from history header
- Only + New Session button remains for creating sessions

src/views/SearchView.vue

@@ -31,7 +31,6 @@
           <div class="bkh">
             <span class="bkht">History</span>
             <div class="bkh-actions">
-              <button class="bkh-btn" title="New Chat" @click="startNewChat">+ New</button>
               <button class="bkx" @click="showHistory = false">x</button>
             </div>
             <button class="hs-new-btn" @click="handleNewSession">+ New Session</button>
@@ -799,10 +798,13 @@ async function handleSelectSession(s: SearchSession) {
 }
 
 async function handleNewSession() {
-  const newSession = await createSession('未命名搜尋', mode.value)
+  const now = new Date()
+  const timeStr = `${now.getFullYear()}/${(now.getMonth()+1).toString().padStart(2,'0')}/${now.getDate().toString().padStart(2,'0')} ${now.getHours().toString().padStart(2,'0')}:${now.getMinutes().toString().padStart(2,'0')}`
+  const newSession = await createSession(timeStr, mode.value)
   if (newSession) {
     setCurrentSession(newSession)
     messages.value = []
+    await loadSessions()
   }
 }