fix(app): ignore stale repository open responses

src/App.svelte

@@ -288,6 +288,7 @@
   let fileHistoryLoading = false;
   let fileHistoryRequestId = 0;
   let activeFileHistoryRequestId = "";
+  let repoOpenRequestId = 0;
   let lastFileHistoryHeadHash = "";
   let commitMessage = "";
   let amendMode = false;
@@ -2031,6 +2032,7 @@
   async function openRepo(pathOverride?: string) {
     const path = (pathOverride ?? repoPath).trim();
     if (!path) { errorMessage = "Enter a repository path."; return; }
+    const requestId = ++repoOpenRequestId;
     repoPath = path;
 
     await runOperation("Opening repository", async () => {
@@ -2042,6 +2044,7 @@
       // Single backend round-trip: resolves the repo and reads status, branches,
       // commits and files in one pass instead of four sequential git calls.
       const bundle = await openRepositoryBundle(path, 100);
+      if (requestId !== repoOpenRequestId) return;
       resetRepositoryState(false);
       applyStatus(bundle.status);
       if (globalSearchBusy) void cancelGlobalSearch();
@@ -2235,8 +2238,18 @@
 
     if (!wasActive) return;
     if (next) {
+      // Switch identity immediately. Otherwise a status/fetch request for the
+      // just-closed repository can still finish while it remains active and
+      // reinsert its tab through applyStatus().
+      repoOpenRequestId += 1;
+      activeRepoPath = next.path;
+      repoPath = next.path;
+      status = null;
+      lastStatusFingerprint = "";
+      resetRepositoryState(false);
       await openRepo(next.path);
     } else {
+      repoOpenRequestId += 1;
       resetRepositoryState(true);
       activeView = "management";
     }