Fix 29 audit findings across all severity tiers

data/resources/style.css

@@ -94,6 +94,15 @@ flowboxchild:focus-visible .card {
     outline-offset: 3px;
 }
 
+/* App card status indicators */
+.status-ok {
+    border: 1px solid alpha(@success_bg_color, 0.4);
+}
+
+.status-attention {
+    border: 1px solid alpha(@warning_bg_color, 0.4);
+}
+
 /* Rounded icon clipping for list view */
 .icon-rounded {
     border-radius: 8px;
@@ -117,11 +126,6 @@ row:focus-visible {
     outline-offset: -2px;
 }
 
-/* Badge row in app cards */
-.badge-row {
-    margin-top: 4px;
-}
-
 /* Letter-circle fallback icon */
 .letter-icon {
     border-radius: 50%;
@@ -151,18 +155,6 @@ row:focus-visible {
     margin-bottom: 6px;
 }
 
-/* Inline ViewSwitcher positioning */
-.detail-view-switcher {
-    margin-top: 6px;
-    margin-bottom: 6px;
-}
-
-/* ===== Quick Action Pills ===== */
-.quick-action-pill {
-    border-radius: 18px;
-    padding: 6px 16px;
-}
-
 /* ===== Compatibility Warning Banner ===== */
 .compat-warning-banner {
     background: alpha(@warning_bg_color, 0.15);
@@ -171,45 +163,6 @@ row:focus-visible {
     border: 1px solid alpha(@warning_bg_color, 0.3);
 }
 
-/* ===== Dark Mode Differentiation ===== */
-@media (prefers-color-scheme: dark) {
-    .compat-warning-banner {
-        background: alpha(@warning_bg_color, 0.1);
-        border: 1px solid alpha(@warning_bg_color, 0.2);
-    }
-}
-
-/* ===== High Contrast Mode (WCAG AAA 1.4.6) ===== */
-@media (prefers-contrast: more) {
-    flowboxchild:focus-visible .card {
-        outline-width: 3px;
-    }
-
-    button:focus-visible,
-    togglebutton:focus-visible,
-    menubutton:focus-visible,
-    checkbutton:focus-visible,
-    switch:focus-visible,
-    entry:focus-visible,
-    searchentry:focus-visible,
-    spinbutton:focus-visible {
-        outline-width: 3px;
-    }
-
-    row:focus-visible {
-        outline-width: 3px;
-    }
-
-    .status-badge,
-    .status-badge-with-icon {
-        border: 1px solid currentColor;
-    }
-
-    .compat-warning-banner {
-        border: 2px solid @warning_bg_color;
-    }
-}
-
 /* ===== Reduced Motion (WCAG AAA 2.3.3) ===== */
 /* Note: GTK CSS does not support prefers-reduced-motion or !important.
    Reduced motion is handled by the GTK toolkit settings instead