test(editor): cover the Ctrl chord for rich markdown link routing

This file is the only test of handleRichMarkdownEditorClick, and it exercised
metaKey alone, so the isMac branch of modKey had no coverage off macOS. Also
stop claiming the source-owner case proves SSH links stay out of Orca — it
proves the owner survives the hop; http-link-routing.test.ts enforces the rest.

src/renderer/src/components/editor/rich-markdown-editor-click-routing.test.ts

@@ -14,9 +14,10 @@ beforeEach(() => {
   openHttpLinkMock.mockReset()
 })
 
-// Why: the rich editor and the markdown preview render the same file, so a link
-// clicked in either must reach the same destination.
-function clickExternalLinkWithShift(sourceOwner: HttpLinkSourceOwner): boolean {
+// Why: the preview half of this same decision is pinned with an identical options
+// shape in markdown-preview-links.test.ts — the two together keep the editor and
+// preview of one file from routing a link two different ways.
+function clickExternalLinkWithShift(sourceOwner: HttpLinkSourceOwner, isMac = true): boolean {
   const href = 'https://example.com/docs'
   const view = {
     state: {
@@ -32,9 +33,9 @@ function clickExternalLinkWithShift(sourceOwner: HttpLinkSourceOwner): boolean {
   return handleRichMarkdownEditorClick({
     activateMarkdownLink: vi.fn(),
     editorRef: { current: {} } as unknown as MutableRefObject<unknown>,
-    event: { metaKey: true, ctrlKey: false, shiftKey: true } as MouseEvent,
+    event: { metaKey: isMac, ctrlKey: !isMac, shiftKey: true } as MouseEvent,
     filePath: '/repo/docs/README.md',
-    isMac: true,
+    isMac,
     htmlSuperscriptLinkContext: {
       getSnapshot: () => ({ sourceOwner })
     },
@@ -61,9 +62,20 @@ describe('rich markdown editor Shift+modifier click on external links', () => {
     })
   })
 
-  // Why: openHttpLink refuses to route a non-local source into Orca, so the owner
-  // has to survive the hop or an SSH file's links could land in the wrong browser.
-  it('preserves a non-local source owner so remote files stay out of Orca', () => {
+  // Why: AGENTS.md — Shift+Ctrl is the chord off macOS, and modKey reads a
+  // different event field there.
+  it('uses the Ctrl chord off macOS', () => {
+    expect(clickExternalLinkWithShift({ kind: 'local' }, false)).toBe(true)
+    expect(openHttpLinkMock).toHaveBeenCalledWith('https://example.com/docs', {
+      worktreeId: 'wt-1',
+      modifierHeld: true,
+      sourceOwner: { kind: 'local' }
+    })
+  })
+
+  // Why: the owner has to survive the hop; openHttpLink is what then refuses to put
+  // a non-local source in Orca (enforced in http-link-routing.test.ts, not here).
+  it('forwards a non-local source owner untouched', () => {
     const sourceOwner = { kind: 'ssh', connectionId: 'conn-1' } as HttpLinkSourceOwner
 
     expect(clickExternalLinkWithShift(sourceOwner)).toBe(true)