0.37.5: overwrite prompt for file upload + auto-reveal uploaded hidden files

The reported "upload doesn't work, file never appears" was two things, both
hit when uploading config files like .env:

1. Single-file upload used overwrite=false and dead-ended on "Already
   exists: .env — rename or remove the existing file first." with no way to
   replace the file. Now a conflict opens an Overwrite confirmation dialog
   (mirroring the copy/paste conflict flow) that retries with overwrite=true.
2. .env (and any dotfile) is hidden, so even a successful upload stayed
   invisible unless "Show hidden" was on. After an upload whose name/path
   has a dot-segment, "Show hidden" is now auto-enabled so the file shows.

The single-file upload mutation now takes {file, overwrite}; folder upload
(already overwrite=true) also auto-reveals hidden results.

Frontend-only; all 3 images rebuilt+pushed 0.37.5.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/version.py

@@ -1,3 +1,3 @@
 """Single source of truth for the StackPilot release version."""
 
-APP_VERSION = "0.37.4"
+APP_VERSION = "0.37.5"

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "stackpilot-frontend",
   "private": true,
-  "version": "0.37.4",
+  "version": "0.37.5",
   "type": "module",
   "scripts": {
     "dev": "vite",

frontend/src/pages/Files.tsx

@@ -82,6 +82,7 @@ export function Files() {
   const [deleting, setDeleting] = useState<HostPathEntry | null>(null);
   const [newKind, setNewKind] = useState<"dir" | "file" | null>(null);
   const [clip, setClip] = useState<Clipboard | null>(null);
+  const [uploadConflict, setUploadConflict] = useState<File | null>(null);
   const [pasteConflict, setPasteConflict] = useState(false);
   const [progress, setProgress] = useState<{
     label: string;
@@ -131,10 +132,18 @@ export function Files() {
 
   const refresh = () => qc.invalidateQueries({ queryKey: ["files"] });
 
+  // An uploaded dotfile (e.g. .env) is hidden by default — auto-reveal it so
+  // the user can actually see what they just uploaded.
+  const revealIfHidden = (...names: string[]) => {
+    if (!showHidden && names.some((n) => n.split("/").some((seg) => seg.startsWith(".")))) {
+      setShowHidden(true);
+    }
+  };
+
   const upload = useMutation({
-    mutationFn: (file: File) => {
+    mutationFn: ({ file, overwrite }: { file: File; overwrite: boolean }) => {
       setProgress({ label: file.name, pct: 0, kind: "upload" });
-      return filesApi.upload(path, file, false, "", host, (pct) =>
+      return filesApi.upload(path, file, overwrite, "", host, (pct) =>
         setProgress({
           label: file.name,
           pct,
@@ -145,12 +154,15 @@ export function Files() {
     },
     onSuccess: (r) => {
       toast.success(`Uploaded ${r.name}`);
+      setUploadConflict(null);
+      revealIfHidden(r.name);
       refresh();
     },
-    onError: (e: unknown) => {
+    onError: (e: unknown, vars) => {
       const msg = apiErrorMessage(e);
+      // Offer to overwrite instead of dead-ending on "Already exists".
       if (msg.startsWith("Already exists")) {
-        toast.error(`${msg} — rename or remove the existing file first.`);
+        setUploadConflict(vars.file);
       } else {
         toast.error(msg);
       }
@@ -201,9 +213,12 @@ export function Files() {
       }
       return { ok, failed };
     },
-    onSuccess: ({ ok, failed }) => {
+    onSuccess: ({ ok, failed }, files) => {
       if (failed) toast.warning(`Uploaded ${ok} file(s), ${failed} failed`);
       else toast.success(`Uploaded ${ok} file(s)`);
+      revealIfHidden(
+        ...files.map((f) => (f as File & { webkitRelativePath?: string }).webkitRelativePath || f.name),
+      );
       refresh();
     },
     onError: (e) => toast.error(apiErrorMessage(e)),
@@ -335,7 +350,7 @@ export function Files() {
                 className="hidden"
                 onChange={(e) => {
                   const f = e.target.files?.[0];
-                  if (f) upload.mutate(f);
+                  if (f) upload.mutate({ file: f, overwrite: false });
                 }}
               />
               {/* webkitdirectory is set imperatively via the callback ref. */}
@@ -610,6 +625,18 @@ export function Files() {
           onCancel={() => setPasteConflict(false)}
         />
       )}
+
+      {uploadConflict && (
+        <ConfirmDialog
+          title={`“${uploadConflict.name}” already exists here`}
+          message={`Overwrite the existing file at ${path}?`}
+          confirmLabel="Overwrite"
+          danger
+          busy={upload.isPending}
+          onConfirm={() => upload.mutate({ file: uploadConflict, overwrite: true })}
+          onCancel={() => setUploadConflict(null)}
+        />
+      )}
     </div>
   );
 }