sync: bring over remaining release/custom-0.1.115 changes

- Extract PublicSettingsInjectionPayload named struct with drift test
- Add channel_monitor_default_interval_seconds to SSR injection
- Add image_output_price to SupportedModelChip
- Simplify AppSidebar buildSelfNavItems (admins see available channels)
- Add gateway WARN logs for 503 no-available-accounts branches
- Wire ChannelMonitorRunner into provideCleanup for graceful shutdown
- Add migrations 130/131 (CC template userid fix + mimicry field cleanup)
- Clean up fork-only features (sora, claude max simulation, client affinity)
- Remove ~320 obsolete i18n keys
- Add codexUsage utility, WechatServiceButton, BulkEditAccountModal
- Tidy go.sum

frontend/src/views/admin/__tests__/SettingsView.spec.ts

@@ -155,8 +155,6 @@ vi.mock("vue-i18n", async () => {
     "admin.settings.payment.findProvider": "查看支持的支付方式",
     "admin.settings.openaiExperimentalScheduler.title": "OpenAI 实验调度策略",
     "admin.settings.openaiExperimentalScheduler.description": "默认关闭。开启后仅影响本网关在 OpenAI 账号间的实验性调度选择逻辑，不代表上游 OpenAI 官方能力。",
-    "admin.settings.site.uploadImage": "上传图片",
-    "admin.settings.site.remove": "移除",
   };
   return {
     ...actual,
@@ -242,37 +240,6 @@ const SelectStub = defineComponent({
   },
 });
 
-const ImageUploadStub = defineComponent({
-  props: {
-    modelValue: {
-      type: String,
-      default: "",
-    },
-    uploadLabel: {
-      type: String,
-      default: "",
-    },
-    removeLabel: {
-      type: String,
-      default: "",
-    },
-    placeholder: {
-      type: String,
-      default: "",
-    },
-  },
-  setup(props) {
-    return () =>
-      h("div", {
-        class: "image-upload-stub",
-        "data-model-value": props.modelValue,
-        "data-upload-label": props.uploadLabel,
-        "data-remove-label": props.removeLabel,
-        "data-placeholder": props.placeholder,
-      });
-  },
-});
-
 const baseSettingsResponse = {
   registration_enabled: true,
   email_verify_enabled: false,
@@ -408,7 +375,7 @@ function mountView() {
         GroupBadge: true,
         GroupOptionItem: true,
         ProxySelector: true,
-        ImageUpload: ImageUploadStub,
+        ImageUpload: true,
         BackupSettings: true,
       },
     },
@@ -615,7 +582,7 @@ describe("admin SettingsView payment visible method controls", () => {
           GroupBadge: true,
           GroupOptionItem: true,
           ProxySelector: true,
-          ImageUpload: ImageUploadStub,
+          ImageUpload: true,
           BackupSettings: true,
         },
       },
@@ -641,24 +608,6 @@ describe("admin SettingsView payment visible method controls", () => {
     );
     expect(wrapper.text()).not.toContain("OpenAI 高级调度器");
   });
-
-  it("passes translated upload and remove labels to the payment help image uploader", async () => {
-    const wrapper = mountView();
-
-    await flushPromises();
-    await openPaymentTab(wrapper);
-
-    const imageUploads = wrapper.findAll(".image-upload-stub");
-    expect(imageUploads.length).toBeGreaterThan(0);
-
-    const paymentHelpImageUpload = imageUploads.find(
-      (node) => node.attributes("data-placeholder") === "admin.settings.payment.helpImagePlaceholder",
-    );
-
-    expect(paymentHelpImageUpload).toBeDefined();
-    expect(paymentHelpImageUpload?.attributes("data-upload-label")).toBe("上传图片");
-    expect(paymentHelpImageUpload?.attributes("data-remove-label")).toBe("移除");
-  });
 });
 
 describe("admin SettingsView wechat connect controls", () => {