fix(core): auto-enable WebFetch and WebSearch tools in Plan mode

[afarber]

TLDR

Allow web_fetch and web_search tools to auto-execute in Plan mode without requiring confirmation

Dive Deeper

In coreToolScheduler.ts, Plan mode blocks any tool where shouldConfirmExecute() returns confirmation details. Both web-fetch.ts and web-search/index.ts only returned false for AUTO_EDIT mode, causing them to be blocked in Plan mode despite being read-only.

• Add ApprovalMode.PLAN check to shouldConfirmExecute() in web-fetch.ts
• Add ApprovalMode.PLAN check to shouldConfirmExecute() in web-search/index.ts

Reviewer Test Plan

1. Run npm run build && npm start
2. Type /approval-mode plan to enable Plan mode
3. Ask the model to fetch a URL or search the web
4. Verify the tool executes without a confirmation prompt

Testing Matrix

	🍏	🪟	🐧
npm run	yes	❓	❓
npx	❓	❓	❓
Docker	❓	❓	❓
Podman	❓	-	-
Seatbelt	❓	-	-

Linked issues / bugs

Fixes #1394

[afarber]

Tested on my Macbook M1:

[Mingholy]

LGTM!