fix(desktop): show git-described version in dev instead of stale 0.1.0

Packaged builds are unaffected: scripts/package.mjs already injects the
git tag into electron-builder's extraMetadata.version, so the .app users
download from GitHub Release reports the right version through
app.getVersion() and the auto-updater's latest.yml comparison works
correctly.

Dev mode (`pnpm dev:desktop`) didn't go through that path though, so
app.getVersion() returned the static "0.1.0" from package.json — the
new Settings → Updates panel surfaced this and made it look like the
dev build was ancient. Add a tiny getAppVersion() helper that falls
back to `git describe --tags --always --dirty` only when !app.isPackaged,
and use it for the app-info IPC. No change to packaged behavior; if git
is unavailable for any reason, we silently fall back to app.getVersion().

apps/desktop/src/main/app-version.ts

@@ -0,0 +1,33 @@
+import { app } from "electron";
+import { execSync } from "node:child_process";
+
+/**
+ * Resolve the running app version. In packaged builds this is the value
+ * `electron-builder` baked into package.json via `extraMetadata.version`
+ * (driven by `git describe` — see `apps/desktop/scripts/package.mjs`), so
+ * `app.getVersion()` matches the GitHub Release tag exactly.
+ *
+ * In dev (`pnpm dev:desktop`) `app.getVersion()` only sees the static
+ * `apps/desktop/package.json` value, which is "0.1.0" and never bumped —
+ * the Settings → Updates panel and any other UI surfacing the version
+ * would mislead developers into thinking they're running ancient builds.
+ * Fall back to `git describe --tags --always --dirty` (same source the
+ * packager uses) so dev shows e.g. `0.2.19-14-gabcdef-dirty`. If git is
+ * unavailable for whatever reason, we just return the package.json value.
+ */
+export function getAppVersion(): string {
+  if (app.isPackaged) {
+    return app.getVersion();
+  }
+  try {
+    const raw = execSync("git describe --tags --always --dirty", {
+      cwd: app.getAppPath(),
+      encoding: "utf-8",
+      stdio: ["ignore", "pipe", "ignore"],
+    }).trim();
+    if (!raw) return app.getVersion();
+    return raw.replace(/^v/, "");
+  } catch {
+    return app.getVersion();
+  }
+}

apps/desktop/src/main/index.ts

@@ -7,6 +7,7 @@ import { setupAutoUpdater } from "./updater";
 import { setupDaemonManager } from "./daemon-manager";
 import { openExternalSafely } from "./external-url";
 import { installContextMenu } from "./context-menu";
+import { getAppVersion } from "./app-version";
 
 // Bundled icon used for dev-mode dock/taskbar branding. In production the
 // app bundle icon (from electron-builder) wins; this path is only consumed
@@ -203,7 +204,7 @@ if (!gotTheLock) {
     ipcMain.on("app:get-info", (event) => {
       const p = process.platform;
       const os = p === "darwin" ? "macos" : p === "win32" ? "windows" : p === "linux" ? "linux" : "unknown";
-      event.returnValue = { version: app.getVersion(), os };
+      event.returnValue = { version: getAppVersion(), os };
     });
 
     // IPC: toggle immersive mode — hides the macOS traffic lights so full-screen

apps/desktop/src/renderer/src/components/updates-settings-tab.tsx

@@ -5,12 +5,13 @@ import { Button } from "@multica/ui/components/ui/button";
 type CheckState =
   | { status: "idle" }
   | { status: "checking" }
-  | { status: "up-to-date"; currentVersion: string }
+  | { status: "up-to-date" }
   | { status: "available"; latestVersion: string }
   | { status: "error"; message: string };
 
 export function UpdatesSettingsTab() {
   const [state, setState] = useState<CheckState>({ status: "idle" });
+  const currentVersion = window.desktopAPI.appInfo.version;
 
   const handleCheck = useCallback(async () => {
     setState({ status: "checking" });
@@ -22,7 +23,7 @@ export function UpdatesSettingsTab() {
     setState(
       result.available
         ? { status: "available", latestVersion: result.latestVersion }
-        : { status: "up-to-date", currentVersion: result.currentVersion },
+        : { status: "up-to-date" },
     );
   }, []);
 
@@ -35,6 +36,15 @@ export function UpdatesSettingsTab() {
       </p>
 
       <div className="mt-6 divide-y">
+        <div className="flex items-center justify-between gap-6 py-4">
+          <div className="min-w-0">
+            <p className="text-sm font-medium">Current version</p>
+            <p className="text-sm text-muted-foreground mt-0.5 font-mono">
+              v{currentVersion}
+            </p>
+          </div>
+        </div>
+
         <div className="flex items-start justify-between gap-6 py-4">
           <div className="min-w-0">
             <p className="text-sm font-medium">Check for updates</p>
@@ -45,7 +55,7 @@ export function UpdatesSettingsTab() {
             {state.status === "up-to-date" && (
               <p className="text-sm text-muted-foreground mt-2 inline-flex items-center gap-1.5">
                 <Check className="size-3.5 text-success" />
-                You&apos;re on the latest version (v{state.currentVersion}).
+                You&apos;re on the latest version.
               </p>
             )}
             {state.status === "available" && (