feat: Adobe积分号不锁定额度 + Nano Banana双通道 + 前端显示额度

- Adobe不再区分视频/图片额度，移除ImageLimited/VideoLimited限制
- Adobe积分号quota耗尽不锁定(status不改为quota)，只记录失败用于轮转
- Nano Banana 2/Pro 保留Runway通道，新增nano-banana-2/nano-banana-pro走Adobe
- Adobe模型重命名: runway-nano-banana-2, runway-nano-banana-pro
- 前端管理后台Adobe账号显示积分余额(之前固定显示—)
- README更新模型列表

frontend/src/views/AccountsView.vue

@@ -189,8 +189,10 @@ async function reconcile() {
         row._unknown = true
         updates++
       } else if (result && result.unchanged === false) {
-        if (row.type === 'adobe') row.reset_after = result.reset_after
-        else applyQuota(row, result)
+        if (row.type === 'adobe') {
+          row.reset_after = result.reset_after
+          applyQuota(row, result)
+        } else applyQuota(row, result)
         updates++
       }
       bump()
@@ -468,7 +470,7 @@ onMounted(() => { loadAccounts(); loadModelList() })
             <td class="px-3 py-3.5 align-middle text-right text-sm tabular-nums whitespace-nowrap">
               <!-- quota column: 数字 / —  (never "未知"/"失败"/"检测中") -->
               <!-- remaining === -1 is the provider "unlimited" sentinel → show — not a scary red -1 -->
-              <span v-if="(a.type === 'openai' || a.type === 'runway' || a.type === 'leonardo' || a.type === 'krea' || a.type === 'imagine' || a.type === 'grok') && a.remaining != null && a.remaining !== -1"
+               <span v-if="(a.type === 'openai' || a.type === 'adobe' || a.type === 'runway' || a.type === 'leonardo' || a.type === 'krea' || a.type === 'imagine' || a.type === 'grok') && a.remaining != null && a.remaining !== -1"
                     class="font-mono font-semibold"
                     :class="a.remaining > 0 ? 'text-emerald-300' : 'text-rose-300'">{{ a.remaining }}{{ a.type === 'grok' ? '%' : '' }}</span>
               <span v-else class="text-white/25" :title="a._quotaError || ''">—</span>