Fix dashboard blink when cursor leaves ticket table section

- Remove pulse-glow-box animation and translateY from button:hover
  (infinite animation stopping abruptly caused a flash on mouse-leave)
- Scope button transition from 'all' to specific visual properties
  (prevents transform/layout changes from triggering on hover exit)
- Scope th transition from 'all' to background-color + text-shadow

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

assets/css/dashboard.css

@@ -1620,7 +1620,7 @@ button {
     text-transform: uppercase;
     font-weight: bold;
     position: relative;
-    transition: all 0.3s ease;
+    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, text-shadow 0.2s ease;
 }
 
 .btn::before,
@@ -1643,8 +1643,6 @@ button:hover {
     border-color: var(--terminal-amber);
     text-shadow: var(--glow-amber-intense);
     box-shadow: var(--glow-amber-intense);
-    transform: translateY(-2px);
-    animation: pulse-glow-box 1.5s ease-in-out infinite;
 }
 
 .btn:active,
@@ -1777,7 +1775,7 @@ th {
     cursor: pointer;
     color: var(--terminal-amber);
     text-shadow: var(--glow-amber);
-    transition: all 0.3s ease;
+    transition: background-color 0.2s ease, text-shadow 0.2s ease;
 }
 
 th:hover {