fix issues

server/ai/prompt.js

@@ -28,7 +28,7 @@ function buildSystemPrompt(username, isAdmin) {
   const attachmentRules = `
 ⚠️ 附件规则：
 - 图片+物品名（"这是XX的图片"）→ 只返回 purchase_item，绝对不要 is_new/quantity/unit_price
-- 引用历史图片（"上面/前面/刚刚那张"）→ use_recent_image: true
+- 引用历史图片（"上面/前面/刚刚那张""存入附件/添加到附件/关联到"）→ use_recent_image: true，**同时必须提供** purchase_item
 - 纯图片+物品名不是新建采购，系统自动关联附件`;
 
   const prohibitionRules = `
@@ -37,12 +37,14 @@ function buildSystemPrompt(username, isAdmin) {
 
   const purchaseRules = `
 ⚠️ 采购规则：
+- 系统会在 Prompt 末尾提供"当前房间采购清单"，你必须根据清单判断用户是要更新已有记录还是新建。
+- 用户说"买完了/完成了/付过了" → 更新对应记录 status 为"已完成"
 - 只有明确消费意图（购买/采购/下单/付款/买了/花了）才返回 action="purchase"
 - 纯陈述（如"前天deep"）→ action="ignore"
 - 信息不完整 → action="ask" 追问
 - 新建 vs 更新：
   * "昨天/今天/又/再/新/另一批"等重复购买 → is_new: true（强制新建）
-  * "改一下/更新/修改/调整/更正/搞错了/不对/错了/不是XX是YY"等纠正意图 → 不提供 is_new（匹配已有更新）
+  * "改一下/更新/修改/调整/更正/搞错了/不对/错了/不是XX是YY"等纠正意图 → 不提供 is_new（匹配已有更新），**购买清单中的名称是你的匹配线索**
   * "纯图片+物品名"不是新建，不要返回 is_new
   * 无法确定 → 默认 is_new: true
 - amount 由系统自动计算（quantity × unit_price + freight），AI 无需提供

server/handlers.js

@@ -97,6 +97,14 @@ function handleAIResult(aiResult, roomId, username, originalText, attachments) {
   }
 
   if (aiResult.action === 'purchase') {
+    // use_recent_image 但缺 purchase_item → 从房间最近一条采购推断
+    if (aiResult.use_recent_image && (!aiResult.purchase_item || aiResult.purchase_item === 'null')) {
+      const lastPurchase = db.prepare("SELECT item FROM purchases WHERE room_id = ? AND item IS NOT NULL AND item != '' ORDER BY created_at DESC LIMIT 1").get(roomId);
+      if (lastPurchase) {
+        console.log('🛡️ use_recent_image 缺 purchase_item，推断为:', lastPurchase.item);
+        aiResult.purchase_item = lastPurchase.item;
+      }
+    }
     const item = aiResult.purchase_item;
     if (!item || item === 'null' || item === 'undefined' || item.trim().length < 2) {
       console.log('🚫 拒绝无效 purchase_item:', JSON.stringify(item));
@@ -143,11 +151,10 @@ function handleAIResult(aiResult, roomId, username, originalText, attachments) {
     }
     console.log('📦 purchase_item:', aiResult.purchase_item, isNew ? '(强制新建)' : purchase ? '(匹配已有)' : '(未匹配-新建)');
 
-    // is_new 为 false 但匹配失败 → 拒绝新建，提示用户
+    // is_new 未明确设为 false、且所有回退匹配均失败 → 视为新建
     if (!isNew && !purchase) {
-      storeAndBroadcastText(roomId, '小财', `未找到与「${aiResult.purchase_item}」匹配的采购记录，无法更新。请检查物品名称是否正确。`);
-      addToHistory(roomId, 'assistant', `未找到匹配记录`);
-      return;
+      console.log('📦 未匹配到已有记录，转为新建模式');
+      isNew = true;
     }
 
     let replyText = '';

server/routes/messages.js

@@ -44,15 +44,20 @@ router.post('/:roomId/messages', authMiddleware, async (req, res) => {
   try {
     const history = getHistory(roomId);
     const historyMessages = history.map(e => ({ role: e.role, content: e.content }));
-    const aiResponse = await analyzeWithDeepSeek(text || '', historyMessages, username, req.user.isAdmin);
+    const aiResponse = await analyzeWithDeepSeek(text || '', historyMessages, username, req.user.isAdmin, roomId);
     if (aiResponse && aiResponse.action !== 'ignore') {
       handleAIResult(aiResponse, roomId, username, text || '', attachments || []);
     }
   } catch (e) { console.error('AI 分析失败:', e); }
 });
 
-async function analyzeWithDeepSeek(text, historyMessages, username, isAdmin) {
-  const systemPrompt = buildSystemPrompt(username, isAdmin);
+async function analyzeWithDeepSeek(text, historyMessages, username, isAdmin, roomId) {
+  // 注入当前房间采购清单上下文
+  const purchases = db.prepare("SELECT item, quantity, amount, status, created_at FROM purchases WHERE room_id = ? ORDER BY created_at DESC LIMIT 10").all(roomId);
+  const purchaseContext = purchases.length
+    ? `\n📋 当前房间采购清单（最近10条）：\n${purchases.map(p => `- ${p.item} | ×${p.quantity} | ¥${p.amount} | ${p.status} | ${p.created_at}`).join('\n')}`
+    : '';
+  const systemPrompt = buildSystemPrompt(username, isAdmin) + purchaseContext;
   const messages = [
     { role: 'system', content: systemPrompt },
     ...historyMessages.slice(-30),