Gallery search built a single `%{search}%` LIKE, so multi-word queries only matched the exact adjacent phrase ("red car" missed "a car that is red") and literal % / _ acted as SQL wildcards. Split on whitespace and require each token to match (prompt OR tags OR ai_tags), escaping LIKE wildcards per token; same escaping for the tag filter. Promote _escape_like to public escape_like_pattern() shared helper.
Part of #2123.
Tests: tests/test_gallery_search_multiword.py (5 tests); 4 fail pre-fix, 5 pass post-fix. Neighbors (session_search, gallery null-user, shims): 25 passed.
* feat(auth): add per-user admin promote/demote toggle
Admin-only API and Users-tab control to grant/revoke admin rights; refuses to demote the last admin.
* fix(auth): restore pre-admin privilege restrictions on demotion
Promoting now stashes the user's privilege map (privileges_before_admin)
and demoting restores it instead of resetting to defaults, so a
promote/demote round trip can no longer broaden a restricted user's
access. Users without a stash (created as admin, or promoted before this
fix) still demote to DEFAULT_PRIVILEGES so a born-admin's stored all-True
map — including can_use_bash — can't survive demotion.
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Co-authored-by: K M Merajul Arefin <merajul.arefin@therapservices.net>
Render streamed markdown incrementally (freeze finalized blocks,
re-render only the growing tail) instead of re-rendering the whole
message every token, which recreated every <pre> and dropped CSS :hover.
Merajul Arefin