refactor: replace overloaded surface terminology

packages/feedback/command-feedback/src/index.ts

@@ -57,7 +57,7 @@ declare module '@deepseek-ai/dsh-session/types' {
   interface SessionEventMap {
     /**
      * One recorded human remark about this session. Log-only and independent
-     * of its trigger; it never enters the model surface or derived history.
+     * of its trigger; it never enters model context or derived history.
      */
     'feedback/record': { text: string }
   }

packages/feedback/command-feedback/tests/command-feedback.spec.ts

@@ -205,7 +205,7 @@ describe('/feedback human command', () => {
     expect(feedbackTexts(test.session)).toEqual(['local only'])
   })
 
-  it('keeps every recorded event off the model surface and out of derived history', async () => {
+  it('keeps every recorded event out of model context and derived history', async () => {
     const test = await harness()
     await run(test, ' invisible to the model')
     for (const event of test.session.events) {