fix(graph-ui): scope typed-path picker refresh to Windows drive paths

The debounced folder-list refresh (and Enter-to-navigate) on the Repository path field now only fires for Windows drive paths (e.g. 'D:/'), where typing is the mechanism for switching drives. POSIX path navigation is left exactly as before.

Add a regression test asserting a typed POSIX path does not trigger a re-browse.

Signed-off-by: Zadak <rarepops@protonmail.com>

graph-ui/src/components/StatsTab.test.tsx

@@ -187,6 +187,26 @@ describe("StatsTab index modal", () => {
       expect(fetchMock).toHaveBeenCalledWith("/api/browse?path=C%3A%2F");
     });
   });
+
+  it("does not auto-refresh on POSIX when a path is typed", async () => {
+    const fetchMock = mockProjectsFetch(); // browse returns POSIX path "/home/dev"
+
+    render(<StatsTab onSelectProject={() => {}} />);
+    fireEvent.click(await screen.findByRole("button", { name: "Index your first repository" }));
+    await screen.findByText("alpha"); // initial POSIX listing
+
+    const browseCalls = () =>
+      fetchMock.mock.calls.filter((c) => String(c[0]).startsWith("/api/browse")).length;
+    const before = browseCalls();
+
+    fireEvent.change(screen.getByLabelText("Repository path"), {
+      target: { value: "/usr/local" },
+    });
+
+    /* Wait past the debounce window; a POSIX path must NOT trigger a re-browse. */
+    await new Promise((r) => setTimeout(r, 400));
+    expect(browseCalls()).toBe(before);
+  });
 });
 
 describe("IndexProgress", () => {

graph-ui/src/components/StatsTab.tsx

@@ -208,12 +208,14 @@ function CreateIndexModal({ onClose, onCreated }: { onClose: () => void; onCreat
   useEffect(() => { browse(); }, [browse]);
   useEffect(() => { filterRef.current?.focus(); }, []);
 
-  /* When the user types a path directly into the Repository path field, refresh
-   * the folder listing to match (debounced). Without this the breadcrumb and
-   * path box updated but the directory list stayed stale — e.g. typing "D:/"
-   * still showed the previous location's folders. */
+  /* Windows only: when the user types a drive path into the Repository path
+   * field, refresh the folder listing to match (debounced). On Windows, typing
+   * is the way to switch drives, and without this the breadcrumb and path box
+   * updated but the directory list stayed stale (e.g. typing "D:/" still showed
+   * the previous drive's folders). POSIX navigation is left unchanged. */
   useEffect(() => {
     if (!currentPath || currentPath === lastBrowsedRef.current) return;
+    if (!/^[A-Za-z]:/.test(currentPath.replace(/\\/g, "/"))) return;
     const id = setTimeout(() => { void browse(currentPath, { silent: true }); }, 350);
     return () => clearTimeout(id);
   }, [currentPath, browse]);
@@ -300,7 +302,7 @@ function CreateIndexModal({ onClose, onCreated }: { onClose: () => void; onCreat
               aria-label={t.index.repositoryPath}
               value={currentPath}
               onChange={(e) => setCurrentPath(e.target.value)}
-              onKeyDown={(e) => { if (e.key === "Enter") { e.preventDefault(); void browse(currentPath); } }}
+              onKeyDown={(e) => { if (e.key === "Enter" && /^[A-Za-z]:/.test(currentPath.replace(/\\/g, "/"))) { e.preventDefault(); void browse(currentPath); } }}
               className="w-full bg-white/[0.04] border border-white/[0.06] rounded-lg px-3 py-2 text-[12px] text-foreground font-mono outline-none focus:border-primary/40"
             />
           </label>