fix: add missing CSS classes + clean up remaining inline styles

- Add .lt-modal-sm (max 360px) and .lt-modal-header--danger variant used
  in JS-generated bulk delete confirmation modal (no CSS = unstyled header)
- Add .lt-badge-sm for compact inline badges (comment counts, group tags)
- Add .lt-kv-row { display:contents } with .lt-kv-label/.lt-kv-value rules
  (was missing from previous commit — added in base.css)
- Replace style="text-align:center" with .lt-text-center in JS modal body
- Replace style="flex-direction:column" with .lt-flex-col on .lt-btn-group

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

assets/css/base.css

@@ -1211,6 +1211,7 @@ select option:checked {
   letter-spacing: 0.1em;
   border: 1px solid currentColor;
 }
+.lt-badge-sm    { font-size: 0.5rem; padding: 0.05rem 0.3rem; }
 .lt-badge-green { color: var(--accent-green); }
 .lt-badge-amber { color: var(--accent-amber); }
 .lt-badge-red   { color: var(--accent-red); }
@@ -1316,6 +1317,19 @@ select option:checked {
 .lt-modal-close:active { color: var(--accent-red); opacity: 0.7; }
 .lt-modal-close:focus-visible { outline: 2px solid var(--accent-cyan); outline-offset: 2px; border-radius: 2px; }
 
+/* Modal size modifier */
+.lt-modal-sm { width: min(360px, 92vw); }
+
+/* Modal header danger variant */
+.lt-modal-header--danger {
+  background: rgba(255, 77, 77, 0.08);
+  border-bottom-color: var(--accent-red);
+}
+.lt-modal-header--danger .lt-modal-title {
+  color: var(--accent-red);
+  text-shadow: var(--glow-red);
+}
+
 .lt-modal-body {
   padding: var(--space-lg);
   overflow-y: auto;

assets/js/dashboard.js

@@ -840,7 +840,7 @@ function showBulkDeleteModal() {
                     <span class="lt-modal-title" id="bulkDeleteModalTitle">[ ! ] DELETE ${ticketIds.length} TICKET(S)</span>
                     <button class="lt-modal-close" data-modal-close aria-label="Close">✕</button>
                 </div>
-                <div class="lt-modal-body" style="text-align:center">
+                <div class="lt-modal-body lt-text-center">
                     <p class="lt-text-danger lt-text-sm">This action cannot be undone!</p>
                     <p class="lt-text-cyan">You are about to permanently delete ${ticketIds.length} ticket(s).<br>All associated comments and history will be lost.</p>
                 </div>

views/DashboardView.php

@@ -431,7 +431,7 @@ include __DIR__ . '/layout_header.php';
       </fieldset>
       <?php endif ?>
 
-      <div class="lt-btn-group" style="flex-direction:column">
+      <div class="lt-btn-group lt-flex-col">
         <button type="button" id="apply-filters-btn" class="lt-btn lt-btn-primary lt-btn-sm">APPLY</button>
         <button type="button" id="clear-filters-btn" class="lt-btn lt-btn-ghost lt-btn-sm">CLEAR ALL</button>
       </div>