Fix ascii-frame-outer blink: eliminate all repaint-causing hover effects

- Change pulse-glow keyframes from text-shadow animation to opacity (GPU composited,
  eliminates 60fps CPU repaint that was the likely root cause of the persistent blink)
- Remove box-shadow from .quick-action-btn:hover; scope transition: all → background/color
- Remove box-shadow + background gradient + transform:translateY from .stat-card:hover;
  scope transition: all → border-color only
- Remove .stat-card::after transition and hover background change
- Remove duplicate .stat-card:hover transform:translateY block
- Remove box-shadow from .clear-search-btn:hover; scope transition: all → background/color
- Remove text-shadow from th transition (th:hover never changes text-shadow)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/css/dashboard.css

@@ -1274,12 +1274,8 @@ h1 {
 }
 
 @keyframes pulse-glow {
-    0%, 100% {
+    0%, 100% { opacity: 0.7; }
-        text-shadow: 0 0 5px currentColor, 0 0 10px currentColor;
+    50% { opacity: 1; }
-    }
-    50% {
-        text-shadow: 0 0 10px currentColor, 0 0 20px currentColor, 0 0 30px currentColor;
-    }
 }
 
 .pulse-glow {
@@ -1758,7 +1754,7 @@ th {
     cursor: pointer;
     color: var(--terminal-amber);
     text-shadow: var(--glow-amber);
-    transition: background-color 0.2s ease, text-shadow 0.2s ease;
+    transition: background-color 0.2s ease;
 }
 
 th:hover {
@@ -2380,13 +2376,12 @@ input[type="checkbox"]:checked {
     font-family: var(--font-mono);
     text-decoration: none;
     cursor: pointer;
-    transition: all 0.2s ease;
+    transition: background 0.2s ease, color 0.2s ease;
 }
 
 .clear-search-btn:hover {
     background: var(--priority-1);
     color: var(--bg-primary);
-    box-shadow: var(--glow-red);
 }
 
 .search-results-info {
@@ -4297,14 +4292,13 @@ tr:hover .quick-actions {
     padding: 0.25rem 0.5rem;
     font-size: 0.9rem;
     cursor: pointer;
-    transition: all 0.2s ease;
+    transition: background 0.15s ease, color 0.15s ease;
     border-radius: 0;
 }
 
 .quick-action-btn:hover {
     background: var(--terminal-green);
     color: var(--bg-primary);
-    box-shadow: var(--glow-green);
 }
 
 /* ===== DASHBOARD STATS WIDGETS ===== */
@@ -4325,7 +4319,7 @@ tr:hover .quick-actions {
     padding: 1rem;
     background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(0, 255, 65, 0.03) 100%);
     border: 2px solid var(--terminal-green);
-    transition: all 0.3s ease;
+    transition: border-color 0.2s ease;
     position: relative;
     overflow: hidden;
 }
@@ -4339,17 +4333,10 @@ tr:hover .quick-actions {
     width: 30px;
     height: 30px;
     background: linear-gradient(135deg, transparent 50%, rgba(0, 255, 65, 0.1) 50%);
-    transition: all 0.3s ease;
 }
 
 .stat-card:hover {
     border-color: var(--terminal-amber);
-    box-shadow: var(--glow-amber);
-    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(255, 176, 0, 0.05) 100%);
-}
-
-.stat-card:hover::after {
-    background: linear-gradient(135deg, transparent 50%, rgba(255, 176, 0, 0.15) 50%);
 }
 
 /* Critical stat card styling */
@@ -4528,12 +4515,8 @@ tr:hover .quick-actions {
 }
 
 /* ===== CLICKABLE STAT CARDS ===== */
-.stat-card:hover {
-    transform: translateY(-2px);
-}
-
 .stat-card:active {
-    transform: translateY(0);
+    opacity: 0.85;
 }
 
 /* ===== TABLE OVERFLOW FIX ===== */