fix: deep audit — wire TDS v1.2 components, fix kanban/tabs/bulk/avatar

- ticket.js: fix showTab() early return preventing attachments/deps from loading
- ticket.js: fix performStatusChange() overwriting lt-status-* classes
- dashboard.js: fix updateSelectionCount() using is-visible instead of style.display
- dashboard.js: fix populateKanbanCards() to use #kanban-col-* IDs (TDS v1.2)
- dashboard.js: fix setViewMode() removing references to old non-TDS elements
- dashboard.js: remove mobile-bottom-nav injection (no CSS existed for it)
- dashboard.css: add full lt-kanban-card component styles with priority accents
- dashboard.css: add mobile sidebar overlay, filter toggle, ticket preview popup CSS
- DashboardView.php: replace priority badges with lt-chip component
- TicketView.php: add lt-avatar with initials to comment author display
- ApiKeysView.php: enhance API usage section with lt-code-block component + curl example

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

assets/css/dashboard.css

@@ -204,6 +204,108 @@ kbd {
 /* ── lt-msg variants ─────────────────────────────────────────── */
 .lt-mb-md { margin-bottom: 1rem; }
 
+/* ── Kanban cards ────────────────────────────────────────────── */
+.lt-kanban-card {
+  padding: 0.6rem 0.75rem;
+  border: 1px solid rgba(0, 255, 65, 0.2);
+  margin-bottom: 0.4rem;
+  cursor: pointer;
+  transition: border-color 0.15s ease, background 0.15s ease;
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
+}
+.lt-kanban-card:hover,
+.lt-kanban-card:focus-visible {
+  border-color: var(--lt-text-primary, #00ff41);
+  background: rgba(0, 255, 65, 0.04);
+  outline: none;
+}
+.lt-kanban-card--p1 { border-left: 2px solid var(--lt-danger, #ff4d4d); }
+.lt-kanban-card--p2 { border-left: 2px solid var(--lt-amber,  #ffb000); }
+.lt-kanban-card--p3 { border-left: 2px solid var(--lt-cyan,   #00ffff); }
+.lt-kanban-card--p4 { border-left: 2px solid rgba(0, 255, 65, 0.4); }
+.lt-kanban-card--p5 { border-left: 2px solid rgba(0, 255, 65, 0.2); }
+
+.lt-kanban-card-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+.lt-kanban-card-title {
+  font-size: 0.78rem;
+  line-height: 1.35;
+  font-weight: 600;
+  word-break: break-word;
+}
+.lt-kanban-card-footer {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-top: 0.1rem;
+}
+.lt-kanban-assignee {
+  width: 1.5rem;
+  height: 1.5rem;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border: 1px solid rgba(0, 255, 65, 0.35);
+  font-size: 0.6rem;
+  font-weight: 700;
+  flex-shrink: 0;
+}
+
+/* ── Mobile sidebar overlay ──────────────────────────────────── */
+.mobile-sidebar-overlay {
+  display: none;
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.6);
+  z-index: 199;
+}
+.mobile-sidebar-overlay.active { display: block; }
+
+/* ── Mobile filter toggle button ─────────────────────────────── */
+.mobile-filter-toggle {
+  display: none;
+  width: 100%;
+  padding: 0.5rem 0.75rem;
+  margin-bottom: 0.5rem;
+  background: transparent;
+  border: 1px solid rgba(0, 255, 65, 0.3);
+  color: var(--lt-text-primary, #00ff41);
+  font-family: inherit;
+  font-size: 0.75rem;
+  letter-spacing: 0.05em;
+  cursor: pointer;
+  text-align: left;
+}
+
+/* ── Ticket preview popup ────────────────────────────────────── */
+.ticket-preview-popup {
+  position: fixed;
+  z-index: 9999;
+  background: var(--lt-surface, #0a0e14);
+  border: 1px solid rgba(0, 255, 65, 0.4);
+  padding: 0.75rem;
+  min-width: 280px;
+  max-width: 360px;
+  font-size: 0.75rem;
+  pointer-events: auto;
+  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
+}
+.ticket-preview-popup .preview-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 0.4rem;
+}
+.ticket-preview-popup .preview-id   { color: var(--lt-cyan, #00ffff); font-weight: 700; }
+.ticket-preview-popup .preview-title { font-weight: 600; margin-bottom: 0.4rem; }
+.ticket-preview-popup .preview-meta { opacity: 0.7; display: flex; flex-direction: column; gap: 0.1rem; }
+.ticket-preview-popup .preview-footer { margin-top: 0.4rem; opacity: 0.5; font-size: 0.65rem; }
+
 /* ── Responsive ──────────────────────────────────────────────── */
 @media (max-width: 768px) {
   .lt-page-header {
@@ -214,10 +316,10 @@ kbd {
   .lt-stats-grid {
     grid-template-columns: repeat(2, 1fr);
   }
+  .mobile-filter-toggle { display: block; }
+  .lt-sidebar.mobile-open { transform: translateX(0); }
 }
 
 @media (max-width: 480px) {
-  .lt-stats-grid {
-    grid-template-columns: 1fr;
-  }
+  .lt-stats-grid { grid-template-columns: 1fr; }
 }