Fix Windows tag checkout result handling

windows/tauri/src/platform/core-result-adapter.test.ts

@@ -37,6 +37,36 @@ describe("git checkout result adaptation", () => {
   });
 });
 
+describe("git tag checkout result adaptation", () => {
+  test("maps a successful core tag checkout to the UI checkout result", () => {
+    const result = adaptCoreResult(
+      "git_checkout_tag",
+      { repoPath: "C:/work", name: "v0.3.0" },
+      { output: "HEAD is now at abc1234 Release 0.3.0\n", exitCode: 0 },
+    );
+
+    expect(result).toEqual({
+      success: true,
+      hasChanges: false,
+      message: "HEAD is now at abc1234 Release 0.3.0",
+    });
+  });
+
+  test("reports failure when the core tag checkout exited non-zero", () => {
+    const result = adaptCoreResult(
+      "git_checkout_tag",
+      { repoPath: "C:/work", name: "missing-tag" },
+      { output: "error: pathspec 'missing-tag' did not match", exitCode: 1 },
+    );
+
+    expect(result).toEqual({
+      success: false,
+      hasChanges: false,
+      message: "error: pathspec 'missing-tag' did not match",
+    });
+  });
+});
+
 describe("git checkout preflight adaptation", () => {
   test("reports blocked paths returned by the shared core", () => {
     const result = adaptCoreResult(

windows/tauri/src/platform/core-result-adapter.ts

@@ -229,8 +229,11 @@ export function adaptCoreResult<T>(
         : [];
       return { blocked: blockingPaths.length > 0, blockingPaths } as T;
     }
-    case "git_checkout_tag":
-      return { success: true, hasChanges: false, message: "" } as T;
+    case "git_checkout_tag": {
+      const exitCode = typeof data.exitCode === "number" ? data.exitCode : 0;
+      const output = typeof data.output === "string" ? data.output.trim() : "";
+      return { success: exitCode === 0, hasChanges: false, message: output } as T;
+    }
     case "git_operation_state": {
       const kind = typeof data.kind === "string" ? data.kind : "";
       if (!kind) {