fix(tui): complete absolute paths as paths

ui-tui/src/__tests__/useCompletion.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it } from 'vitest'
+
+import { completionRequestForInput } from '../hooks/useCompletion.js'
+
+describe('completionRequestForInput', () => {
+  it('routes real slash commands to slash completion', () => {
+    expect(completionRequestForInput('/help')).toMatchObject({
+      method: 'complete.slash',
+      params: { text: '/help' },
+      replaceFrom: 1
+    })
+  })
+
+  it('does not route absolute paths through slash completion', () => {
+    expect(
+      completionRequestForInput('/home/d/Desktop/agenda/CrimsonRed/.hermes/plans/2026-05-04-HANDOFF-NEXT.md')
+    ).toMatchObject({
+      method: 'complete.path',
+      params: { word: '/home/d/Desktop/agenda/CrimsonRed/.hermes/plans/2026-05-04-HANDOFF-NEXT.md' },
+      replaceFrom: 0
+    })
+  })
+
+  it('keeps path completion for trailing absolute path tokens', () => {
+    expect(completionRequestForInput('read /home/d/Desktop/file.md')).toMatchObject({
+      method: 'complete.path',
+      params: { word: '/home/d/Desktop/file.md' },
+      replaceFrom: 5
+    })
+  })
+
+  it('leaves plain text alone', () => {
+    expect(completionRequestForInput('hello there')).toBeNull()
+  })
+})