Consolidates the scattered per-analyst pages into /me/activity (usage
analytics) and /me/profile (account hub). /me/stats and /profile/sessions
301-redirect; /profile, /me/debug, /tokens are removed with every internal
link repointed. Includes an XSS fix in the /me/activity page hero, the
user_id-keyed session-lookup alignment, and the v0.54.15 release cut.
Co-developed by @ZdenekSrotyr and @cvrysanek.
Adds /me/debug HTML page rendering the logged-in user's own session state — decoded JWT claims (no raw token, sha256[:12] fingerprint for log correlation), group memberships with sources and bound external_id when present, resource grants effective via those memberships, and a Refetch from Google (dry-run) button that diffs a fresh fetch_user_groups call against the cached user_group_members snapshot. Gated by AGNES_DEBUG_AUTH env var (default off → 404, route existence undetectable in production). Self-only by construction: user_id is read from the validated session, never echoes raw JWT / password hash / full PAT. Tolerates v13 + v14 schemas via information_schema check on users.external_id.
