refactor(tui): drive the vibe heart from the core reaction event

Replace the client-side GOOD_VIBES_RE detection with the backend `reaction`
event: on it, flash the status-bar heart and the pet's celebrate pose. Detection
now lives once in the core, so the TUI, CLI, and desktop stay in sync.

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

@@ -38,7 +38,6 @@ function makeDeps(gw: GatewayClient, over: Partial<SubmitPromptDeps> = {}): Subm
     enqueue: vi.fn(),
     expand: (t: string) => t,
     gw,
-    maybeGoodVibes: vi.fn(),
     setLastUserMsg: vi.fn(),
     sys: vi.fn(),
     ...over

ui-tui/src/app/createGatewayEventHandler.ts

@@ -20,7 +20,7 @@ import type { Msg, SubagentProgress, SubagentStatus } from '../types.js'
 import { applyDelegationStatus, getDelegationState } from './delegationStore.js'
 import type { GatewayEventHandlerContext } from './interfaces.js'
 import { getOverlayState, patchOverlayState } from './overlayStore.js'
-import { flashPet } from './petFlashStore.js'
+import { flashGoodVibes, flashPet } from './petFlashStore.js'
 import { turnController } from './turnController.js'
 import { getTurnState } from './turnStore.js'
 import { getUiState, patchUiState } from './uiStore.js'
@@ -717,6 +717,14 @@ export function createGatewayEventHandler(ctx: GatewayEventHandlerContext): (ev:
 
         return
 
+      case 'reaction':
+        // Core-detected affection (ily / <3 / good bot): flash the ♥ and let the
+        // pet celebrate. Same signal drives the desktop's floating hearts.
+        flashGoodVibes()
+        flashPet('jump')
+
+        return
+
       case 'tool.start':
         turnController.recordTodos(ev.payload.todos)
         turnController.recordToolStart(

ui-tui/src/app/petFlashStore.ts

@@ -14,6 +14,13 @@ export const $petFlash = atom<PetFlash | null>(null)
 
 export const flashPet = (state: PetState, ms = 1600) => $petFlash.set({ state, until: Date.now() + ms })
 
+// Affection-heart beat: a monotonic tick the status-bar ♥ flashes on. Bumped by
+// the gateway `reaction` event (core-detected ily / <3 / good bot) — the TUI's
+// share of the same signal that plays the desktop's floating hearts.
+export const $goodVibesTick = atom(0)
+
+export const flashGoodVibes = () => $goodVibesTick.set($goodVibesTick.get() + 1)
+
 // The floating pet's footprint, or null when no pet is shown. The transcript
 // keeps its text clear of the pet responsively: on wide terminals it reserves a
 // right gutter (`width`) so lines wrap to the pet's LEFT; on narrow terminals it

ui-tui/src/app/submissionCore.ts

@@ -15,7 +15,6 @@ export interface SubmitPromptDeps {
   enqueue: (text: string) => void
   expand: (text: string) => string
   gw: GatewayClient
-  maybeGoodVibes: (text: string) => void
   setLastUserMsg: (value: string) => void
   sys: (text: string) => void
 }
@@ -61,7 +60,6 @@ export function submitPrompt(text: string, deps: SubmitPromptDeps, showUserMessa
     }
 
     turnController.clearStatusTimer()
-    deps.maybeGoodVibes(submitText)
     deps.setLastUserMsg(text)
 
     if (show) {

ui-tui/src/app/useMainApp.ts

@@ -37,6 +37,7 @@ import { planGatewayRecovery } from './gatewayRecovery.js'
 import { getInputSelection } from './inputSelectionStore.js'
 import { type GatewayRpc, type TranscriptRow } from './interfaces.js'
 import { $overlayState, patchOverlayState } from './overlayStore.js'
+import { $goodVibesTick } from './petFlashStore.js'
 import { scrollWithSelectionBy } from './scroll.js'
 import { turnController } from './turnController.js'
 import { patchTurnState, useTurnSelector } from './turnStore.js'
@@ -48,7 +49,6 @@ import { useLongRunToolCharms } from './useLongRunToolCharms.js'
 import { useSessionLifecycle } from './useSessionLifecycle.js'
 import { useSubmission } from './useSubmission.js'
 
-const GOOD_VIBES_RE = /\b(good bot|thanks|thank you|thx|ty|ily|love you)\b/i
 const BRACKET_PASTE_ON = '\x1b[?2004h'
 const BRACKET_PASTE_OFF = '\x1b[?2004l'
 const MAX_HEIGHT_CACHE_BUCKETS = 12
@@ -185,7 +185,8 @@ export function useMainApp(gw: GatewayClient) {
   const [sessionStartedAt, setSessionStartedAt] = useState(() => Date.now())
   const [turnStartedAt, setTurnStartedAt] = useState<null | number>(null)
   const [lastTurnEndedAt, setLastTurnEndedAt] = useState<null | number>(null)
-  const [goodVibesTick, setGoodVibesTick] = useState(0)
+  // Bumped by the gateway `reaction` event (core-detected affection).
+  const goodVibesTick = useStore($goodVibesTick)
   const [bellOnComplete, setBellOnComplete] = useState(false)
 
   const ui = useStore($uiState)
@@ -445,12 +446,6 @@ export function useMainApp(gw: GatewayClient) {
     [sys]
   )
 
-  const maybeGoodVibes = useCallback((text: string) => {
-    if (GOOD_VIBES_RE.test(text)) {
-      setGoodVibesTick(v => v + 1)
-    }
-  }, [])
-
   const rpc: GatewayRpc = useCallback(
     async <T extends Record<string, any> = Record<string, any>>(
       method: string,
@@ -690,7 +685,6 @@ export function useMainApp(gw: GatewayClient) {
     composerRefs,
     composerState,
     gw,
-    maybeGoodVibes,
     setLastUserMsg,
     slashRef,
     submitRef,

ui-tui/src/app/useSubmission.ts

@@ -37,7 +37,6 @@ export function useSubmission(opts: UseSubmissionOptions) {
     composerRefs,
     composerState,
     gw,
-    maybeGoodVibes,
     setLastUserMsg,
     slashRef,
     submitRef,
@@ -87,14 +86,13 @@ export function useSubmission(opts: UseSubmissionOptions) {
           enqueue: composerActions.enqueue,
           expand,
           gw,
-          maybeGoodVibes,
           setLastUserMsg,
           sys
         },
         showUserMessage
       )
     },
-    [appendMessage, composerActions, composerState.pasteSnips, gw, maybeGoodVibes, setLastUserMsg, sys]
+    [appendMessage, composerActions, composerState.pasteSnips, gw, setLastUserMsg, sys]
   )
 
   const shellExec = useCallback(
@@ -362,7 +360,6 @@ export interface UseSubmissionOptions {
   composerRefs: ComposerRefs
   composerState: ComposerState
   gw: GatewayClient
-  maybeGoodVibes: (text: string) => void
   setLastUserMsg: (value: string) => void
   slashRef: MutableRefObject<(cmd: string) => boolean>
   submitRef: MutableRefObject<(value: string) => void>

ui-tui/src/gatewayTypes.ts

@@ -618,6 +618,7 @@ export type GatewayEvent =
   | { payload?: GatewaySkin; session_id?: string; type: 'skin.changed' }
   | { payload: SessionInfo; session_id?: string; type: 'session.info' }
   | { payload?: { text?: string }; session_id?: string; type: 'thinking.delta' }
+  | { payload?: { kind?: string }; session_id?: string; type: 'reaction' }
   | { payload?: undefined; session_id?: string; type: 'message.start' }
   | { payload?: { kind?: string; text?: string }; session_id?: string; type: 'status.update' }
   | {