feat: 添加智能记账AI服务，包括聊天、语音输入、交易确认和财务建议，并集成到首页展示。

src/components/home/DailyInsightCard/DailyInsightCard.tsx

@@ -21,6 +21,7 @@ interface DailyInsightCardProps {
   top3Categories?: { name: string; amount: number }[];
   todayTransactionCount?: number;
   last7DaysSpend?: number[]; // 最近7天每日支出
+  recentTransactions?: { date: string; categoryName: string; amount: number; type: string; note?: string }[];
 }
 
 export const DailyInsightCard: React.FC<DailyInsightCardProps> = ({
@@ -39,6 +40,7 @@ export const DailyInsightCard: React.FC<DailyInsightCardProps> = ({
   top3Categories,
   todayTransactionCount,
   last7DaysSpend,
+  recentTransactions,
 }) => {
   const [aiData, setAiData] = useState<{ spending: string; budget: string; emoji?: string; tip?: string } | null>(null);
   const [isAiLoading, setIsAiLoading] = useState(false);
@@ -74,6 +76,7 @@ export const DailyInsightCard: React.FC<DailyInsightCardProps> = ({
           top3Categories,
           todayTransactionCount,
           last7DaysSpend,
+          recentTransactions,
         });
         setAiData(result);
       } catch (e) {
@@ -85,7 +88,7 @@ export const DailyInsightCard: React.FC<DailyInsightCardProps> = ({
 
     const timer = setTimeout(fetchAI, 500);
     return () => clearTimeout(timer);
-  }, [todaySpend, yesterdaySpend, monthlyBudget, monthlySpent, topCategory, maxTransaction, lastWeekSpend, streakDays, budgetRemaining, daysRemaining, weeklyTotal, avgDailySpend, top3Categories, todayTransactionCount, last7DaysSpend]);
+  }, [todaySpend, yesterdaySpend, monthlyBudget, monthlySpent, topCategory, maxTransaction, lastWeekSpend, streakDays, budgetRemaining, daysRemaining, weeklyTotal, avgDailySpend, top3Categories, todayTransactionCount, last7DaysSpend, recentTransactions]);
 
   const getSpendingInsight = (today: number, yesterday: number) => {
     if (aiData) return { text: <span>{aiData.spending}</span>, type: 'ai' };

src/pages/Home/Home.css

@@ -30,20 +30,21 @@
 .home-greeting {
   display: flex;
   flex-direction: column;
-  gap: 2px;
+  gap: 0.75rem;
-  /* Tighter gap */
+  /* Increased gap for better breathing room */
 }
 
 /* ... */
 
 .greeting-text {
   font-family: 'Outfit', sans-serif;
-  font-size: 1.5rem;
+  font-size: 1.75rem;
-  /* Slightly smaller for compactness */
+  /* Restored size */
   font-weight: 700;
-  margin: 0;
+  margin: 0.25rem 0;
+  /* Added vertical margin */
   color: var(--text-primary);
-  line-height: 1.2;
+  line-height: 1.3;
 }
 
 /* ... */

src/pages/Home/Home.tsx

@@ -207,6 +207,16 @@ function Home() {
     };
   }, [todayTransactions, weekTransactions, categories, monthlyBudgetSpentTotal]);
 
+  const recentTransactionsForAI = useMemo(() => {
+    return weekTransactions.map(t => ({
+      date: new Date(t.transactionDate).toLocaleDateString('zh-CN'),
+      categoryName: categories.find(c => c.id === t.categoryId)?.name || '未知',
+      amount: t.amount,
+      type: t.type,
+      note: t.note
+    }));
+  }, [weekTransactions, categories]);
+
   const handleQuickTransaction = () => {
     navigate('/transactions?action=new');
   };
@@ -513,6 +523,7 @@ function Home() {
             lastWeekSpend={lastWeekSpend}
             streakDays={streakInfo?.currentStreak || 0}
             budgetRemaining={monthlyBudgetTotal - monthlyBudgetSpentTotal}
+            recentTransactions={recentTransactionsForAI}
             avgDailySpend={avgDailySpend}
             top3Categories={top3Categories}
             todayTransactionCount={todayTransactionCount}

src/services/aiService.ts

@@ -319,6 +319,7 @@ export interface DailyInsightContext {
   // 分类分析
   topCategory?: { name: string; amount: number };
   top3Categories?: { name: string; amount: number }[]; // 本月前三分类
+  recentTransactions?: { date: string; categoryName: string; amount: number; type: string; note?: string }[]; // 最近7天交易详情
 
   // 交易详情
   maxTransaction?: { note: string; amount: number };
@@ -333,7 +334,9 @@ export interface DailyInsightContext {
  */
 export async function getDailyInsight(context: DailyInsightContext): Promise<{ spending: string; budget: string; emoji?: string; tip?: string }> {
   // Hash needs to include new fields
-  const currentHash = JSON.stringify(context);
+  // Simplify recentTransactions for hash to avoid order issues or too long string
+  const contextForHash = { ...context, recentTransactions: context.recentTransactions?.length };
+  const currentHash = JSON.stringify(contextForHash);
   const NOW = Date.now();
   const CACHE_TTL = 30 * 60 * 1000; // 30 Minutes
 
@@ -348,6 +351,12 @@ export async function getDailyInsight(context: DailyInsightContext): Promise<{ s
   const weekday = new Date().toLocaleDateString('zh-CN', { weekday: 'long' });
   const weekDiff = context.lastWeekSpend !== undefined ? (context.todaySpend - context.lastWeekSpend) : 0;
 
+  // Format recent transactions for AI (simplify to save tokens)
+  const formattedTransactions = context.recentTransactions
+    ?.slice(0, 50) // Limit to 50 items
+    .map(t => `${t.date}: ${t.categoryName} ${t.type === 'expense' ? '-' : '+'}${t.amount.toFixed(1)}${t.note ? ` (${t.note})` : ''}`)
+    .join('\n');
+
   // Prepare enriched context for the backend
   // We format some fields to help the AI understand better (like percentages)
   const enrichedContext = {
@@ -356,7 +365,8 @@ export async function getDailyInsight(context: DailyInsightContext): Promise<{ s
     weekDiff,
     date: new Date().toLocaleDateString('zh-CN'),
     monthProgressPercent: `${(context.monthProgress * 100).toFixed(0)}%`,
-    budgetUsedPercent: `${(context.monthlySpent / (context.monthlyBudget || 1) * 100).toFixed(0)}%`
+    budgetUsedPercent: `${(context.monthlySpent / (context.monthlyBudget || 1) * 100).toFixed(0)}%`,
+    recentTransactionsSummary: formattedTransactions // Send as specific field
   };
 
   try {