Fix: restliche CSP-blockierte Inline-Handler — Bild-Fallbacks (globaler data-fb Error-Handler) + Hover-Effekte (CSS-Utilities + data-hover-play)

App ist jetzt vollständig frei von Inline-Event-Handlern (onerror/onmouseenter/etc.).
data-fb Modi: hide/hide-parent/dim-grandparent/sibling/show-el/emoji/initials + data-fb-src.
Hover: .by-hover-lift/-surface2/-surface3 in utilities.css. SW v1165

backend/static/js/pages/admin.js

@@ -2628,9 +2628,7 @@ window.Page_admin = (() => {
                 </thead>
                 <tbody>
                   ${log.map((l, i) => `
-                    <tr data-log-idx="${i}" style="border-bottom:1px solid var(--c-border);cursor:pointer"
-                        onmouseover="this.style.background='var(--c-surface-2)'"
-                        onmouseout="this.style.background=''">
+                    <tr data-log-idx="${i}" class="by-hover-surface2" style="border-bottom:1px solid var(--c-border);cursor:pointer">
                       <td class="p-2">${accountBadge(l.from_account)}</td>
                       <td class="p-2">${UI.escape(l.recipient)}</td>
                       <td style="padding:var(--space-2);color:var(--c-text-secondary)">${UI.escape(l.subject)}</td>