fix(desktop): scope sidebar data to active profile

[magicJie]

Summary

• scope recents, cron sessions/jobs, and messaging sections to the selected Desktop profile
• preserve the explicit all-profiles view
• apply the same scope through batched, legacy fallback, and remote-profile request paths
• prevent stale/out-of-order async responses from republishing another profile after a live profile switch
• clear profile-scoped secondary sidebar stores before paint during re-home

Tests run

• pytest tests/hermes_cli/test_web_server.py -q -p no:cacheprovider (145 passed; one existing Starlette deprecation warning)
• npm --prefix apps/desktop run test:ui (3642 passed)
• npm --prefix apps/desktop run test:desktop:platforms (1002 passed, 2 skipped)
• npm --prefix apps/desktop run typecheck
• focused ESLint on all changed Desktop files (zero warnings)
• git diff --check

Motivation

The profile rail visually communicates a scoped workspace, but messaging and cron sidebar slices were aggregated across every profile. Besides confusing users, globally cached async results could reappear after a profile switch. This makes the sidebar follow the selected profile consistently while keeping the explicit all-profiles mode available.

[teknium1]

The renderer scoping + stale-async halves landed on main via #87566. What survives here: the Electron profile-session-routing.ts and backend web_routers/profiles.py scoping halves. Leaving open for those.