fix: sync topbar activity pill

[whoisasx]

Summary

• switch the session detail topbar pill to read raw session.activity.state
• keep SCM/coarse status badges out of the topbar while leaving Summary > Activity unchanged
• add ShellTopbar coverage for activity labels and SCM-derived status regression cases

Fixes #2540

Verification

• npm run test -- src/renderer/components/ShellTopbar.test.tsx src/renderer/components/SessionInspector.test.tsx src/renderer/types/workspace.test.ts
• npm run typecheck

[whoisasx]

@Pulkit7070 could you please test this locally and attach screenshots covering the agent activity states the topbar can show: Working, Idle, Input Needed, and Exited? If you can trigger the compact unknown/unavailable state, please include that too.

Please also confirm Summary > Activity still shows the combined activity plus SCM/context badges while the topbar stays limited to the raw agent activity state.

[Pulkit7070]

Tested locally on fix/session-topbar-agent-activity. ✅

Checks

• vitest (ShellTopbar + SessionInspector + workspace): 100 passed
• tsc --noEmit: clean
• CI on this branch: native (windows-latest) and native (ubuntu-latest) pass, plus test / lint / format.

Topbar pill across agent activity states

Rendered the real SessionStatusPill with the PR's mapping + live theme tokens — all states, and confirmation that SCM/coarse status is ignored (activity wins):

Live app, Working and Idle:

Follow-up fix included on this branch

While testing I hit a related quirk: after stopping/interrupting the agent, the pill showed Input Needed instead of Idle. Root cause was the backend classifier, not the pill — a Stop sets idle, but the follow-up Notification(idle_prompt) latched the session to the sticky waiting_input state.

Pushed a fix (0cb09476): in claudecode notificationState, idle_prompt → idle; only permission_prompt (a real tool-approval block) stays waiting_input. So a stop/finished turn now reads Idle, while genuine permission requests still surface as Input Needed. Added TestHooks_IdlePromptReportsIdle + updated the adapter/CLI tests (green on Windows + Linux in CI).

Note: this adds a small backend change to the branch — happy to split it into its own PR if you'd prefer to keep this one frontend-only.

Summary > Activity unchanged

The pill change only touches ShellTopbar.tsx, so the inspector's Activity row still combines both — agent activity (SessionInspector.tsx:281, InspectorActivityPill) and SCM/context states (:288, scmTimelineStates). Topbar shows only the raw activity state. Inspector keeps the fuller "Activity Unavailable" label for unknown; topbar uses the compact "Unknown" — consistent with the issue.

LGTM. ✅

[Pulkit7070]

Approving ✅

Tested locally on this branch: the topbar pill now reflects the raw agent activity state across all cases (Working / Idle / Input Needed / Exited / compact Unknown) and no longer shows SCM/coarse status. Summary > Activity still shows the combined activity + SCM/context badges. vitest + tsc --noEmit pass locally, and CI is green on windows-latest and ubuntu-latest. Screenshots + full breakdown in my comment above.

Also folded in a small backend fix (idle_prompt → idle) so a stop/interrupt reads Idle instead of a sticky Input Needed — see the comment for the rationale and the added tests.

[whoisasx]

Closing this PR to avoid carrying duplicate backend activity changes alongside #2528.

Pulkit’s follow-up here and #2528 both address the same Claude Code behavior: idle_prompt should map to idle, while permission_prompt remains waiting_input. To keep the queue cleaner, we should let #2528 carry that backend fix. If the topbar-only UI behavior from this PR is still needed after that lands, it can be reopened as a smaller frontend-only change.

[whoisasx]

Reopening this PR — it was closed by mistake while intending to close #2528. This PR should remain open as the broader #2540 fix.