fix(showcase): resolve CST stale highlight paths in manifest

Four stale highlight paths in claude-sdk-typescript/manifest.yaml referenced
files that don't exist in the demo folders, breaking the shell-docs
bundle-demo-content step:

- chat-slots: custom-welcome-screen.tsx -> slot-wrappers.tsx (mirrors LGP layout)
- gen-ui-tool-based: agent.ts -> bar-chart.tsx (mirrors LGP layout)
- gen-ui-interrupt: time-picker-card.tsx -> _components/time-picker-card.tsx
- headless-complete: tool-renderers.tsx + use-rendered-messages.tsx -> chat/chat.tsx + hooks/use-tool-renderers.tsx (mirrors LGP layout)

Verified locally: scripts/bundle-demo-content.ts now bundles all 695 demos
with 0 failures.

Author: jpr5

showcase/integrations/claude-sdk-typescript/manifest.yaml

@@ -114,7 +114,7 @@ demos:
     highlight:
       - src/agent_server.ts
       - src/app/demos/chat-slots/page.tsx
-      - src/app/demos/chat-slots/custom-welcome-screen.tsx
+      - src/app/demos/chat-slots/slot-wrappers.tsx
       - src/app/api/copilotkit/route.ts
   - id: chat-customization-css
     name: Chat Customization (CSS)
@@ -231,7 +231,7 @@ demos:
     highlight:
       - src/agent_server.ts
       - src/app/demos/gen-ui-tool-based/page.tsx
-      - src/app/demos/gen-ui-tool-based/agent.ts
+      - src/app/demos/gen-ui-tool-based/bar-chart.tsx
       - src/app/api/copilotkit/route.ts
   - id: shared-state-streaming
     name: State Streaming
@@ -497,7 +497,7 @@ demos:
     highlight:
       - src/agent_server.ts
       - src/app/demos/gen-ui-interrupt/page.tsx
-      - src/app/demos/gen-ui-interrupt/time-picker-card.tsx
+      - src/app/demos/gen-ui-interrupt/_components/time-picker-card.tsx
       - src/app/api/copilotkit/route.ts
   - id: interrupt-headless
     name: Headless Interrupt (testing)
@@ -520,8 +520,8 @@ demos:
     highlight:
       - src/agent/headless-complete-prompt.ts
       - src/app/demos/headless-complete/page.tsx
-      - src/app/demos/headless-complete/tool-renderers.tsx
-      - src/app/demos/headless-complete/use-rendered-messages.tsx
+      - src/app/demos/headless-complete/chat/chat.tsx
+      - src/app/demos/headless-complete/hooks/use-tool-renderers.tsx
       - src/app/api/copilotkit-headless-complete/route.ts
   - id: a2ui-fixed-schema
     name: A2UI (Fixed Schema)