v0.2.5 - Combined changelogs, UI polish & telemetry fixes

TL;DR

• Combined changelogs - jumping multiple versions now shows what shipped in every release you skipped.
• UI + TUI polish - session permalinks, scroll stability, local time in logs TUI, wider sidebar.
• Telemetry that works - PostHog person profiles, reliable heartbeats, accurate install counts.

Added

• Combined changelogs on update - /v1/changelog?from=vX.Y.Z Worker endpoint returns all releases since that version; agentjail update displays grouped TL;DR bullets per release
• Session URL permalinks - selecting a session updates the URL; restored on page load and browser back/forward
• "All Sessions" back button - visible at top of sidebar when a session is selected

Fixed

• Logs TUI local time - timestamps now display in local time instead of UTC
• Person properties - every telemetry event now sends $set/$set_once so PostHog builds person profiles
• Heartbeat reliability - CLI waits for heartbeat POST before exiting
• Install inflation - is_fresh_install distinguishes first-ever installs from refreshes
• Timeline scroll stability - scroll position preserved during SSE updates
• Expanded event identity - cards track by req_id|time instead of array index
• Timeline grid layout - Summary column is now flexible; no empty space on the right
• Worktree repo name - resolves real repo name inside worktrees

Changed

• Sidebar width - default widened from 208px to 280px
• Active session threshold - reduced from 15m to 10m
• Releases Worker cache TTL - reduced from 5m to 1m