feat: 添加预算管理功能，支持分类预算和重置周期设置，优化用户界面

src/stores/settings.js

@@ -7,6 +7,18 @@ export const useSettingsStore = defineStore(
     const notificationCaptureEnabled = ref(true)
     const aiAutoCategoryEnabled = ref(false)
     const monthlyBudget = ref(12000)
+    const budgetResetCycle = ref('monthly') // monthly | weekly | none | custom
+    const budgetMonthlyResetDay = ref(1) // 每月第几天重置，1-28
+    const budgetCustomStartDate = ref('') // 自定义起始日（ISO 日期字符串）
+    const categoryBudgets = ref({
+      Food: 0,
+      Transport: 0,
+      Health: 0,
+      Groceries: 0,
+      Entertainment: 0,
+      Uncategorized: 0,
+    })
+    const categoryBudgetEnabled = ref(false)
     const profileName = ref('Echo 用户')
     const profileAvatar = ref('')
 
@@ -23,6 +35,38 @@ export const useSettingsStore = defineStore(
       monthlyBudget.value = Number.isFinite(numeric) && numeric >= 0 ? numeric : 0
     }
 
+    const setBudgetResetCycle = (value) => {
+      const allowed = ['monthly', 'weekly', 'none', 'custom']
+      budgetResetCycle.value = allowed.includes(value) ? value : 'monthly'
+    }
+
+    const setCategoryBudget = (category, value) => {
+      const numeric = Number(value)
+      const safe = Number.isFinite(numeric) && numeric >= 0 ? numeric : 0
+      categoryBudgets.value = {
+        ...categoryBudgets.value,
+        [category]: safe,
+      }
+    }
+
+    const setCategoryBudgetEnabled = (value) => {
+      categoryBudgetEnabled.value = !!value
+    }
+
+    const setBudgetMonthlyResetDay = (value) => {
+      const n = Number(value)
+      if (!Number.isFinite(n)) {
+        budgetMonthlyResetDay.value = 1
+        return
+      }
+      const clamped = Math.min(Math.max(Math.round(n), 1), 28)
+      budgetMonthlyResetDay.value = clamped
+    }
+
+    const setBudgetCustomStartDate = (value) => {
+      budgetCustomStartDate.value = value || ''
+    }
+
     const setProfileName = (value) => {
       profileName.value = (value || '').trim() || 'Echo 用户'
     }
@@ -35,11 +79,21 @@ export const useSettingsStore = defineStore(
       notificationCaptureEnabled,
       aiAutoCategoryEnabled,
       monthlyBudget,
+      budgetResetCycle,
+      budgetMonthlyResetDay,
+      budgetCustomStartDate,
+      categoryBudgets,
+      categoryBudgetEnabled,
       profileName,
       profileAvatar,
       setNotificationCaptureEnabled,
       setAiAutoCategoryEnabled,
       setMonthlyBudget,
+      setBudgetResetCycle,
+      setBudgetMonthlyResetDay,
+      setBudgetCustomStartDate,
+      setCategoryBudget,
+      setCategoryBudgetEnabled,
       setProfileName,
       setProfileAvatar,
     }
@@ -50,6 +104,11 @@ export const useSettingsStore = defineStore(
         'notificationCaptureEnabled',
         'aiAutoCategoryEnabled',
         'monthlyBudget',
+        'budgetResetCycle',
+        'budgetMonthlyResetDay',
+        'budgetCustomStartDate',
+        'categoryBudgets',
+        'categoryBudgetEnabled',
         'profileName',
         'profileAvatar',
       ],