feat: save session with name prompt

- Save button now prompts for session name
- Uses same rename dialog with different labels
- confirmSaveSession saves messages to MarkBase SQLite
- Session appears in history list after save

src/views/SearchView.vue

@@ -57,11 +57,11 @@
         </div>
         <div v-if="renamingSession" class="rename-overlay" @click.self="cancelRename">
           <div class="rename-dialog">
-            <div class="rename-label">Rename conversation</div>
-            <input class="rename-input" v-model="renameValue" @keyup.enter="confirmRename" ref="renameInputEl" />
+            <div class="rename-label">{{ currentSession?.id === renamingSession?.id ? 'Save Session' : 'Rename Session' }}</div>
+            <input class="rename-input" v-model="renameValue" @keyup.enter="currentSession?.id === renamingSession?.id ? confirmSaveSession() : confirmRename()" ref="renameInputEl" />
             <div class="rename-actions">
               <button class="rename-cancel" @click="cancelRename">Cancel</button>
-              <button class="rename-confirm" @click="confirmRename">Save</button>
+              <button class="rename-confirm" @click="currentSession?.id === renamingSession?.id ? confirmSaveSession() : confirmRename()">{{ currentSession?.id === renamingSession?.id ? 'Save' : 'Rename' }}</button>
             </div>
           </div>
         </div>
@@ -755,39 +755,52 @@ async function saveCurrentSession() {
     return
   }
   
-  // If no current session, create one
+  // If no current session, create one with temp name
   if (!currentSession.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)
+    const newSession = await createSession('未命名', mode.value)
     if (newSession) {
       setCurrentSession(newSession)
     }
   }
   
-  // Save all messages to current session
+  // Show rename dialog for session name
   if (currentSession.value) {
-    for (const msg of messages.value) {
-      if (msg.role === 'user' && msg.query) {
-        await saveMessage(currentSession.value.id, {
-          role: 'user',
-          content: msg.query,
-          mode: msg.mode || mode.value
-        })
-      } else if (msg.role === 'assistant') {
-        await saveMessage(currentSession.value.id, {
-          role: 'assistant',
-          content: msg.message || msg.answer || '',
-          mode: msg.mode || mode.value,
-          results: msg.results
-        })
-      }
-    }
-    await loadSessions()
-    alert('Session saved!')
+    renamingSession.value = currentSession.value
+    renameValue.value = currentSession.value.title === '未命名' ? '' : currentSession.value.title
+    nextTick(() => renameInputEl.value?.focus())
   }
 }
 
+async function confirmSaveSession() {
+  if (!renamingSession.value) return
+  
+  // Update session title
+  const title = renameValue.value || `Session ${new Date().toLocaleString()}`
+  await renameSession(renamingSession.value.id, title)
+  
+  // Save all messages to current session
+  for (const msg of messages.value) {
+    if (msg.role === 'user' && msg.query) {
+      await saveMessage(renamingSession.value.id, {
+        role: 'user',
+        content: msg.query,
+        mode: msg.mode || mode.value
+      })
+    } else if (msg.role === 'assistant') {
+      await saveMessage(renamingSession.value.id, {
+        role: 'assistant',
+        content: msg.message || msg.answer || '',
+        mode: msg.mode || mode.value,
+        results: msg.results
+      })
+    }
+  }
+  
+  renamingSession.value = null
+  renameValue.value = ''
+  await loadSessions()
+}
+
 function toggleSessionMenu(id: string) {
   activeSessionMenu.value = activeSessionMenu.value === id ? null : id
 }