feat: add DSH IDE open-file references

dsh-plugin/test/client.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest'
+import { candidateFromItem, serializeIdeReference } from '../src/client.js'
+
+const item = {
+  path: 'F:\\project\\a&b.ts',
+  label: 'a&b.ts',
+  dirty: true,
+  ide: 'vscode' as const,
+  instanceId: 'one',
+  workspace: 'F:\\project',
+  instanceOpenCount: 4,
+}
+
+describe('client reference projection', () => {
+  it('keeps the path in a structured JSON payload', () => {
+    expect(serializeIdeReference(item.path)).toBe('<ide-open-file>{"path":"F:\\\\project\\\\a&b.ts"}</ide-open-file>')
+  })
+
+  it('shows IDE, count and dirty state', () => {
+    const candidate = candidateFromItem(item)
+    expect(candidate.description).toContain('VS Code')
+    expect(candidate.description).toContain('4 open')
+    expect(candidate.description).toContain('unsaved changes')
+  })
+})