fix(web): bind prompts to plan selection

packages/host/apiproxy/tests/fetch-carrier.spec.ts

@@ -84,7 +84,12 @@ describe('unary round trip (handler ⇄ client, no network)', () => {
   it('covers create/prompt/cancel/plan/describe passthrough', async () => {
     const c = client()
     expect((await c.sessions.create({})).result.ok).toBe(true)
-    expect((await c.sessions.prompt({ sessionId: 's' as never, mode: 'queue', content: [{ type: 'text', text: 'x' }] })).result.ok).toBe(true)
+    expect((await c.sessions.prompt({
+      sessionId: 's' as never,
+      mode: 'queue',
+      content: [{ type: 'text', text: 'x' }],
+      planMode: true,
+    })).result.ok).toBe(true)
     expect((await c.sessions.cancel({ sessionId: 's' as never })).result.ok).toBe(true)
     expect((await c.sessions.planMode({ sessionId: 's' as never })).result).toEqual({ ok: true, value: null })
     expect((await c.sessions.setPlanMode({ sessionId: 's' as never, active: true })).result).toEqual({ ok: true, value: null })

packages/host/apiproxy/tests/rpc-schemas.spec.ts

@@ -101,9 +101,14 @@ describe('sessions domain schemas', () => {
     expect(sessionHistoryRequestSchema.parse({ sessionId: 's1', beforeSeq: 3, maxMessages: 5 }).beforeSeq).toBe(3)
     expect(() => sessionHistoryRequestSchema.parse({ sessionId: 's1', maxMessages: 0 })).toThrow()
     expect(sessionHistoryValueSchema.parse({ events: [], hasMore: false }).hasMore).toBe(false)
-    const prompt = sessionPromptRequestSchema.parse({ sessionId: 's1', mode: 'queue', content: [{ type: 'text', text: 'hi' }] })
-    expect(prompt.mode).toBe('queue')
+    const prompt = sessionPromptRequestSchema.parse({
+      sessionId: 's1', mode: 'queue', content: [{ type: 'text', text: 'hi' }], planMode: true,
+    })
+    expect(prompt).toMatchObject({ mode: 'queue', planMode: true })
     expect(() => sessionPromptRequestSchema.parse({ sessionId: 's1', mode: 'inject', content: [] })).toThrow()
+    expect(() => sessionPromptRequestSchema.parse({
+      sessionId: 's1', mode: 'queue', content: [], planMode: 'plan',
+    })).toThrow()
     expect(sessionPromptValueSchema.parse({ accepted: true }).accepted).toBe(true)
     expect(sessionCancelRequestSchema.parse({ sessionId: 's1' }).sessionId).toBe('s1')
     expect(sessionCancelValueSchema.parse({ accepted: true }).accepted).toBe(true)