feat: Third pass aligning core experience with IntelliJ IDEA

Project & files
- Project view modes (Project Files / Open Files / All Changed Files /
  Scratches); External Libraries for Python, JDK (src.zip), Node, Cargo, Go,
  Maven/Gradle jars; read-only jar/zip browsing
- ⌘N New popup with type search and more file kinds; New Project, Rename
  Project, Reload All from Disk, Export/Import Settings, Power Save Mode
- File type associations, extra content roots and exclude patterns (indexed
  and watched without reopening the project)

Editor & navigation
- Find bar: search scope (comments/strings), Preserve Case, Exclude, multiline,
  history; Find in Files: Module scope, custom pattern scopes, multiline
- Search Everywhere filters, Assign Shortcut, settings results; named bookmark
  lists, file/folder bookmarks; Structure filters and Show Inherited; Recent
  Locations timestamps and breadcrumbs; Code Vision author
- Completion options, editor tab placement/layout, inline completion (LSP 3.18)
- Spell checking (Typo inspection, ide-spell) and Inspections settings with
  custom profiles; Code Style schemes, formatter markers, Do not format

Run, VCS, services, database
- Typed run configurations (Shell, Program, npm, Gradle, Maven, Docker,
  Compound), Modify options, Before launch, env dialog, Current File,
  Emulate terminal (PTY)
- Git log graph/view options, Go to Hash/Branch/Tag, date filter keeps the
  graph; Pull/Merge/Rebase dialogs, Manage Remotes, Worktrees
- Generic Services host (Docker connections/registries, run sessions); TODO
  scope/changes tabs with changelists; Coverage report import
- Data sources: wire-compatible vendors, URL import, SSL certs, Options,
  Schemas and Advanced tabs, color and comment

Workbench
- Run Anything, Customize Main Toolbar, named tool window layouts, menu
  completeness, Code Cleanup, macros, "Don't Show Again", editor banners
- Chinese translations for the new UI

Claude-Session: https://claude.ai/code/session_01SaPPsVPuk6ZTNsoUCNCbMv

src/editor/refactor/index.ts

@@ -4,5 +4,5 @@
  * is not usable (see `@/editor/structure`).
  */
 export { introduceFallback, type FallbackReason, type IntroduceKind } from "./introduce";
-export { refactorThis, runRefactoring } from "./refactorThis";
+export { refactorThis, runRefactoring, showNothingHere } from "./refactorThis";
 export { askUsagesDetected, fileUsages, safeDelete, viewUsages, type FileUsages, type UsagesAnswer } from "./safeDelete";

src/editor/refactor/refactorThis.test.ts

@@ -188,8 +188,10 @@ describe("Refactor This", () => {
   it("says so when nothing applies", async () => {
     const v = editor();
     await refactorThis(v, vi.fn());
-    expect(useLspPopup.getState().popup).toBeNull();
-    expect(showHint).toHaveBeenCalledWith(v, "No refactorings available at the caret");
+    expect(labels()).toEqual(["Nothing here"]);
+    const popup = useLspPopup.getState().popup as { items: { disabled?: string | null }[] };
+    expect(popup.items[0]!.disabled).toBeTruthy();
+    expect(showHint).not.toHaveBeenCalled();
   });
 
   it("cancels a superseded query and drops answers after the caret moved", async () => {

src/editor/refactor/refactorThis.ts

@@ -261,8 +261,18 @@ export async function refactorThis(view: EditorView, rename: (view: EditorView)
   // Superseded, or the caret moved / the text changed meanwhile: the answer is stale.
   if (run.signal.aborted || view.state.doc !== state.doc || !view.state.selection.eq(state.selection)) return;
   if (!items.length) {
-    showHint(view, "No refactorings available at the caret");
+    showNothingHere(caretAnchor(view, state.selection.main.head));
     return;
   }
   openPopup({ kind: "list", anchor: caretAnchor(view, state.selection.main.head), title: "Refactor This", items, numbered: true });
 }
+
+/** IDEA's "Nothing here" popup: Refactor This where no refactoring applies (or outside an editor). */
+export function showNothingHere(anchor: { x: number; y: number } = { x: window.innerWidth / 2, y: window.innerHeight / 3 }) {
+  openPopup({
+    kind: "list",
+    anchor,
+    title: "Refactor This",
+    items: [{ id: "nothing", label: "Nothing here", disabled: "No refactoring applies here", run: () => {} }],
+  });
+}