feat(aigc): fully integrate backend API and replace mock data

- Replace all static mock data with real backend API calls for templates, generation tasks, credit balance and recharge
- Remove deprecated mock data files including templates.js, versionOptions.js, records.js and packages.js
- Add useCurrentCredit composable for fetching and managing user credit balance
- Update all components to align with new backend data shapes (e.g. templateItemId instead of id)
- Add loading and disabled states for interactive UI elements
- Implement full WeChat mini-program payment flow for credit recharge
- Fix template and record card UI styling and media handling
- Set developVersion flag to true for testing environment

src/pages-aigc/recharge/components/CustomAmountCard/index.vue

@@ -1,6 +1,6 @@
 <template>
-  <view :class="['custom-card', { 'is-selected': selected }]" @tap="emit('select')">
-    <text class="custom-title">自选金额</text>
+  <view class="custom-card is-selected">
+    <text class="custom-title">充值金额</text>
 
     <label class="custom-input-wrap">
       <text class="custom-currency">¥</text>
@@ -8,43 +8,29 @@
         class="custom-input"
         type="number"
         :value="modelValue"
-        @focus="emit('select')"
         @input="handleInput"
       />
     </label>
 
     <view class="custom-hint">
-      <text>按 1 元 = 100 积分换算</text>
-      <text>当前可得 {{ currentPoints }} 积分</text>
+      <text>请输入整数金额</text>
     </view>
   </view>
 </template>
 
 <script setup>
-import { computed } from "vue";
-
-const props = defineProps({
+defineProps({
   modelValue: {
     type: String,
     default: "",
   },
-  selected: {
-    type: Boolean,
-    default: false,
-  },
 });
 
-const emit = defineEmits(["update:modelValue", "select"]);
-
-const currentPoints = computed(() => {
-  const amount = Number.parseInt(props.modelValue || "0", 10);
-  return Number.isNaN(amount) ? 0 : amount * 100;
-});
+const emit = defineEmits(["update:modelValue"]);
 
 const handleInput = (event) => {
   const rawValue = event?.detail?.value ?? event?.target?.value ?? "";
   const value = String(rawValue).replace(/\D/g, "");
-  emit("select");
   emit("update:modelValue", value);
 };
 </script>