fix(updater): separate Windows 7 offline update path

apps/desktop/src/components/layout/UpdateDialog.spec.ts

@@ -14,6 +14,7 @@ const mountedApps: App[] = [];
 interface DialogState {
   open: boolean;
   portableMode: boolean;
+  manualUpdateOnly: boolean;
   isDownloadingUpdate: boolean;
   downloadProgress: number;
   updateDownloaded: boolean;
@@ -30,6 +31,7 @@ async function mountDialog(activeTaskCount: number, initialState: Partial<Dialog
   const state = reactive<DialogState>({
     open: true,
     portableMode: false,
+    manualUpdateOnly: false,
     isDownloadingUpdate: false,
     downloadProgress: 0,
     updateDownloaded: false,
@@ -67,6 +69,7 @@ async function mountDialog(activeTaskCount: number, initialState: Partial<Dialog
               latest_version: "0.5.61",
               update_available: true,
               portable_mode: state.portableMode,
+              manual_update_only: state.manualUpdateOnly,
               release_name: "DBX v0.5.61",
               release_url: "https://github.com/t8y2/dbx/releases/tag/v0.5.61",
               release_notes: "",
@@ -136,6 +139,23 @@ describe("UpdateDialog active task guard", () => {
     expect(downloadButton()?.disabled).toBe(false);
   });
 
+  it("routes Windows 7 builds to the dedicated installer", async () => {
+    await mountDialog(0, { manualUpdateOnly: true });
+
+    expect(document.body.textContent).toContain("WebView2 109 offline installer");
+    expect(downloadButton()).toBeUndefined();
+    expect(buttonWithText("Open Release")).toBeDefined();
+  });
+
+  it("prevents Windows 7 portable builds from installing the regular x64 portable update", async () => {
+    await mountDialog(0, { portableMode: true, manualUpdateOnly: true });
+
+    expect(document.body.textContent).toContain("WebView2 109 offline installer");
+    expect(document.body.textContent).not.toContain("signed portable ZIP");
+    expect(downloadButton()).toBeUndefined();
+    expect(buttonWithText("Open Release")).toBeDefined();
+  });
+
   it("retains the downloaded update and enables installation only after tasks finish", async () => {
     await mountDialog(1, { updateDownloaded: true, downloadProgress: 100 });
 

apps/desktop/src/components/layout/UpdateDialog.vue

@@ -106,9 +106,12 @@ watch(
           <code class="bg-muted px-1 py-0.5 rounded text-[11px]">docker compose pull && docker compose up -d</code>
           {{ t("updates.toUpdate") }}
         </p>
-        <p v-if="isDesktop && updateInfo?.update_available && updateInfo.portable_mode" class="text-xs text-muted-foreground">
+        <p v-if="isDesktop && updateInfo?.update_available && updateInfo.portable_mode && !updateInfo.manual_update_only" class="text-xs text-muted-foreground">
           {{ t("updates.portableAutomaticUpdate") }}
         </p>
+        <p v-if="isDesktop && updateInfo?.update_available && updateInfo.manual_update_only" class="text-xs text-muted-foreground">
+          {{ t("updates.windows7ManualUpdate") }}
+        </p>
         <div v-if="canDownloadAndInstallUpdate(updateInfo, isDesktop) && activeTaskCount > 0" role="alert" class="flex items-start gap-2 rounded-md border border-amber-500/40 bg-amber-500/10 px-3 py-2 text-xs text-amber-700 dark:text-amber-300">
           <AlertTriangle class="mt-0.5 h-4 w-4 shrink-0" />
           <span>{{ t("updates.activeTasksBlockUpdate", { count: activeTaskCount }) }}</span>