Add UI enhancements and new features

Keyboard Navigation:
- Add J/K keys for Gmail-style ticket list navigation
- Add N key for new ticket, C for comment focus
- Add G then D for go to dashboard (vim-style)
- Add 1-4 number keys for quick status changes on ticket page
- Add Enter to open selected ticket
- Update keyboard help modal with all new shortcuts

Ticket Age Indicator:
- Show "Last activity: X days ago" on ticket view
- Visual warning (yellow pulse) for tickets idle >5 days
- Critical warning (red pulse) for tickets idle >10 days

Ticket Clone Feature:
- Add "Clone" button on ticket view
- Creates copy with [CLONE] prefix in title
- Preserves description, priority, category, type, visibility
- Automatically creates "relates_to" dependency to original

Active Filter Badges:
- Show visual badges above ticket table for active filters
- Click X on badge to remove individual filter
- "Clear All" button to reset all filters
- Color-coded by filter type (status, priority, search)

Visual Enhancements:
- Add keyboard-selected row highlighting for J/K navigation
- Smooth animations for filter badges

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

assets/css/dashboard.css

@@ -981,6 +981,19 @@ tr:hover {
     box-shadow: inset 0 0 20px rgba(0, 255, 65, 0.1);
 }
 
+/* Keyboard navigation selected row */
+tbody tr.keyboard-selected {
+    background-color: rgba(0, 255, 65, 0.15) !important;
+    box-shadow: inset 0 0 30px rgba(0, 255, 65, 0.2), 0 0 10px rgba(0, 255, 65, 0.3);
+    outline: 2px solid var(--terminal-green);
+    outline-offset: -2px;
+}
+
+tbody tr.keyboard-selected td {
+    color: var(--terminal-green);
+    text-shadow: 0 0 5px rgba(0, 255, 65, 0.5);
+}
+
 tbody tr td:first-child {
     border-left: 6px solid;
 }
@@ -1172,6 +1185,95 @@ td:nth-child(2) span::after {
     margin-left: 4px;
 }
 
+/* ===== ACTIVE FILTERS BAR ===== */
+.active-filters-bar {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: 0.5rem;
+    padding: 0.75rem 1rem;
+    margin-bottom: 1rem;
+    background: rgba(0, 255, 65, 0.05);
+    border: 1px solid var(--terminal-green);
+    border-left: 4px solid var(--terminal-amber);
+}
+
+.active-filters-label {
+    font-family: var(--font-mono);
+    font-size: 0.85rem;
+    color: var(--terminal-amber);
+    font-weight: 600;
+    margin-right: 0.5rem;
+}
+
+.active-filters-list {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.5rem;
+    flex: 1;
+}
+
+.filter-badge {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.4rem;
+    padding: 0.3rem 0.6rem;
+    background: rgba(0, 255, 65, 0.1);
+    border: 1px solid var(--terminal-green);
+    font-family: var(--font-mono);
+    font-size: 0.8rem;
+    color: var(--terminal-green);
+    animation: filter-appear 0.3s ease-out;
+}
+
+@keyframes filter-appear {
+    from {
+        opacity: 0;
+        transform: scale(0.9);
+    }
+    to {
+        opacity: 1;
+        transform: scale(1);
+    }
+}
+
+.filter-badge[data-filter-type="status"] {
+    border-color: var(--terminal-cyan);
+    color: var(--terminal-cyan);
+}
+
+.filter-badge[data-filter-type="priority"] {
+    border-color: var(--terminal-amber);
+    color: var(--terminal-amber);
+}
+
+.filter-badge[data-filter-type="search"] {
+    border-color: var(--terminal-magenta, #ff79c6);
+    color: var(--terminal-magenta, #ff79c6);
+}
+
+.filter-remove {
+    background: none;
+    border: none;
+    color: inherit;
+    font-size: 1.1rem;
+    line-height: 1;
+    cursor: pointer;
+    padding: 0 0.2rem;
+    opacity: 0.7;
+    transition: opacity 0.2s, transform 0.2s;
+}
+
+.filter-remove:hover {
+    opacity: 1;
+    transform: scale(1.2);
+}
+
+.btn-sm {
+    padding: 0.3rem 0.6rem;
+    font-size: 0.8rem;
+}
+
 /* ===== SEARCH AND FILTER STYLES - TERMINAL EDITION ===== */
 .search-box,
 input[type="text"],