fix: hide empty current session from sessions list

[liruifengv]

Related Issue

Resolve #(issue_number)

Description

fix: hide empty current session from sessions list

Checklist

• I have read the CONTRIBUTING document.
• I have linked the related issue, if any.
• I have added tests that prove my fix is effective or that my feature works.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

[trustmiao]

Workmonitor issue-flow plan stage 20260617-141319 issue #13

Plan stage findings:

• GitHub fix: hide empty current session from sessions list #13 resolves to merged PR fix: hide empty current session from sessions list #13, fix: hide empty current session from sessions list; body states the requirement as hiding an empty current session from the sessions list. There are no issue/PR comments.
• Relevant code is in the Kimi TUI session picker path, not in the SDK/storage API:
  • apps/kimi-code/src/tui/kimi-tui.ts: fetchSessions() calls harness.listSessions(...) and maps summaries into picker rows; hasSessionContent() currently checks state.transcriptEntries.length > 0.
  • apps/kimi-code/src/tui/utils/session-picker-rows.ts: maps SessionSummary to SessionRow and filters currentSessionId only when currentSessionHasContent is false.
  • apps/kimi-code/src/tui/components/dialogs/session-picker.ts: renders current-session badge for rows that remain visible.
  • packages/agent-core/src/session/store/session-store.ts and packages/node-sdk/src/kimi-harness.ts: list sessions broadly and should remain unchanged so non-TUI callers still see all persisted sessions.
• Existing focused tests are in apps/kimi-code/test/tui/utils/session-picker-rows.test.ts and cover omitting the current empty session, keeping current session with content, and not filtering empty historical sessions.

Implementation plan:

1. Keep the filtering at the TUI row-adapter boundary (sessionRowsForPicker) so the behavior is scoped to the picker UI and does not alter SDK or storage semantics.
2. Pass the active session id and a UI-owned content flag from KimiTUI.fetchSessions() into sessionRowsForPicker.
3. Define "current session has content" as the TUI transcript having at least one entry, matching the visible conversation state; if later product semantics require queued input/tool-only state to count, extend hasSessionContent() with focused tests.
4. Preserve all fields needed by the picker (title, last_prompt, work_dir, updated_at, metadata) and keep the current-session badge behavior for non-empty current sessions.

Verification plan:

1. Run pnpm --filter @moonshot-ai/kimi-code test -- apps/kimi-code/test/tui/utils/session-picker-rows.test.ts or the repository's equivalent targeted Vitest command for that file.
2. Run the relevant session picker component tests if the picker rendering is touched: apps/kimi-code/test/tui/components/dialogs/session-picker.test.ts.
3. Run a focused typecheck/build command for apps/kimi-code if implementation changes touch kimi-tui.ts imports or public types.
4. Manual TUI smoke check: start a fresh session, open /sessions, confirm the current empty session is hidden; send a prompt or resume a session with transcript content, open /sessions, confirm the current session can appear with the current badge; confirm historical empty sessions are still listed.

No code changes were made in this plan stage.