Convert Audit log tab to pinned-header table matching other log pages

ROADMAP.md

@@ -256,3 +256,5 @@ Roughly in priority order:
 `v0.16.65` fixes three issues reported against the Stored backups card and the new Backup history table right after v0.16.63/v0.16.64. First, the "Configuration only" type chip used the same background color as the surrounding panel (`var(--panel2)` on `var(--panel2)`), making it functionally invisible next to the green "Complete" chip -- it now uses the app's purple accent, tinted the same way every other colored chip already is. Second, the "Site Gateway x.x.x" version line under each chip sat flush with the column's left edge while the chip's own text started a few pixels in from its padding, reading as slightly misaligned -- a `.chip+small{margin-left:var(--space-2)}` rule now lines the two up. Third, and most visible: Backup history's width cap from v0.16.64 (880px) was the wrong fix for the column-spacing complaint -- capping the table made it the one log-style table in the app that doesn't span the panel's full width like Access Logs and Gateway Events do, which is a bigger inconsistency than the spacing problem it was meant to solve. The cap is removed; the wider percentage-based columns introduced alongside it (26%/18%/18%/auto) stay, so the table is full-width again but its columns are no longer crowded into the first ~440px the way the borrowed Gateway Events pixel-widths had them.
 
 `v0.16.66` replaces the generic "X updated" activity message every edit route wrote to Gateway Events -- Hosted Sites, Proxy Hosts, Redirect Hosts, and Streaming Hosts each logged one identical line regardless of what was actually changed in the save, so a rename, a domain change, a TLS toggle, and a health-check edit were all indistinguishable in the log. Each of the four `PATCH` routes now snapshots the relevant fields before applying the request body, diffs them against the saved result, and writes one comma-joined line naming exactly what changed in that save -- e.g. `Proxy host "Plex" updated — renamed from "Plex Media", target changed to 192.168.1.20:32400, TLS set to automatic.` Multiple fields changed in a single save produce one combined line, not one line per field; saving a form with no actual changes (an Edit dialog opened and immediately saved) now writes nothing at all, instead of the previous generic entry firing unconditionally. Primary fields (name, domain/aliases, target, TLS, HSTS, Access List, health-check on/off, and per-type fields like redirect code/path-preservation or streaming port/protocol) are called out individually; the long tail of advanced settings (custom headers, custom Caddy config, load-balancing upstreams/policy, upstream TLS overrides, and the fine-grained health-check parameters) are bucketed into a single "advanced settings updated" line to keep the summary readable rather than enumerating every possible field.
+
+`v0.16.67` converts the Administration -> Users -> Audit log tab from a card-row list (`.event-row` divs with a checkmark/bang `.activity-mark`) to the same pinned-header table every other log-type page now uses -- Gateway Events, Access Logs, and Backup history (v0.16.63). It was the last page still on the older list pattern, noticed immediately after v0.16.66 added several new distinct audit entries and made the mismatch obvious side by side with Gateway Events. The table has four columns -- Time, User, Result, Action -- reusing the exact `performance-table`/`event-table` CSS and the standard green/red `status-dot` convention in place of the old custom `.activity-mark` dot. No backend or data changes; `/api/audit` already returned everything the columns needed. The now-orphaned `#audit-list` div styling (border, background, max-height, the bespoke activity-mark colors) is removed along with it, since the table's own wrapper classes already provide the equivalent scrolling/sticky-header container.