fix(project-tree): reveal WSL paths through the wsl.localhost share (#1806)

* fix(project-tree): reveal WSL paths through the wsl.localhost share

"Reveal in Explorer" in a WSL project passed the distro-internal
/home/... path to revealItemInDir, which read it as a local path and
reported it missing. Translate to the \\wsl.localhost\<distro>\...
UNC share before revealing.

* fix(project-tree): match reveal failure title to the local file manager

src/features/project-tree/operations.test.ts

@@ -7,6 +7,7 @@ import {
   importExternal,
   paste,
   refreshOsClipboard,
+  revealablePath,
   selectionAfterDelete,
   transfer,
   topLevelPaths,
@@ -452,3 +453,43 @@ describe("project clipboard ownership", () => {
     expect(canPaste()).toBe(true);
   });
 });
+
+describe("revealablePath", () => {
+  const platform = usePlatform.getState();
+  afterEach(() => {
+    usePlatform.setState(platform);
+    useRemote.setState({ session: null });
+  });
+
+  it("translates distro paths to the \\\\wsl.localhost share for a WSL session on Windows", () => {
+    usePlatform.setState({ os: "windows" });
+    useRemote.setState({
+      session: {
+        target: { kind: "wsl", distro: "Ubuntu-24.04" },
+        root: "/p",
+        host: "Ubuntu",
+        os: "linux",
+        commands: [],
+      },
+    });
+    expect(revealablePath("/home/me/app/src/main.rs")).toBe(
+      "\\\\wsl.localhost\\Ubuntu-24.04\\home\\me\\app\\src\\main.rs",
+    );
+    expect(revealablePath("/")).toBe("\\\\wsl.localhost\\Ubuntu-24.04\\");
+  });
+
+  it("leaves paths alone for local projects, SSH sessions and non-Windows desktops", () => {
+    usePlatform.setState({ os: "windows" });
+    useRemote.setState({
+      session: { target: { kind: "ssh", config: "host" }, root: "/p", host: "host", os: "linux", commands: [] },
+    });
+    expect(revealablePath("/home/me/app")).toBe("/home/me/app");
+    useRemote.setState({ session: null });
+    expect(revealablePath("C:\\work\\app")).toBe("C:\\work\\app");
+    usePlatform.setState({ os: "macos" });
+    useRemote.setState({
+      session: { target: { kind: "wsl", distro: "Ubuntu" }, root: "/p", host: "Ubuntu", os: "linux", commands: [] },
+    });
+    expect(revealablePath("/home/me/app")).toBe("/home/me/app");
+  });
+});

src/features/project-tree/operations.ts

@@ -39,7 +39,7 @@ import {
   useProjectTree,
 } from "./store";
 import { tx } from "@/platform/i18n";
-import { hostOs, isRemoteWindow } from "@/platform/remote";
+import { hostOs, isRemoteWindow, useRemote } from "@/platform/remote";
 import { usePlatform } from "@/platform/platformInfo";
 
 /** Nodes that may be renamed, moved or deleted (not roots, groups or library sources). */
@@ -821,14 +821,29 @@ export async function copyPaths(kind: PathKind, nodes: ProjectNode[] = selectedN
   }
 }
 
+/**
+ * The path the local OS's file manager can open: in a WSL session the node
+ * paths are inside the distro (`/home/…`), which `revealItemInDir` reads as
+ * local paths — translate them to `\\wsl.localhost\<distro>\…` UNC shares.
+ */
+export function revealablePath(path: string): string {
+  const session = useRemote.getState().session;
+  if (session?.target.kind !== "wsl" || usePlatform.getState().os !== "windows") return path;
+  if (!path.startsWith("/")) return path;
+  return `\\\\wsl.localhost\\${session.target.distro}${path.replaceAll("/", "\\")}`;
+}
+
 export async function revealInFinder(nodes: ProjectNode[] = selectedNodes()) {
-  const paths = nodes.map((n) => n.path);
+  const paths = nodes.map((n) => revealablePath(n.path));
   if (!paths.length) return;
   try {
     const { revealItemInDir } = await import("@tauri-apps/plugin-opener");
     await revealItemInDir(paths.length === 1 ? paths[0]! : paths);
   } catch (e) {
-    fail("Cannot reveal in Finder", e);
+    // Same names as contextMenu.revealLabel (kept local: contextMenu imports
+    // this module, so importing it back would be a cycle).
+    const desktop = usePlatform.getState().os;
+    fail(`Cannot reveal in ${desktop === "windows" ? "Explorer" : desktop === "linux" ? "Files" : "Finder"}`, e);
   }
 }