Extract hardcoded rgba colors and inline styles to CSS classes

- Add .inline-error and .inline-warning utility classes to dashboard.css
  with correctly-matched terminal palette rgba values (replaces off-palette
  rgba(231,76,60,0.1) and rgba(241,196,15,0.1))
- Add .key-generated-alert class for the new API key display frame
- Add base .dependency-item, .dependency-group h4, .dependency-item a,
  .dependency-title, .btn-small overrides to ticket.css
- Remove all inline styles from the dependency list template in ticket.js
  — layout, colors, and sizing now come from CSS classes
- Update CreateTicketView.php and ApiKeysView.php to use the new classes

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

views/CreateTicketView.php

@@ -62,7 +62,7 @@ $nonce = SecurityHeadersMiddleware::getNonce();
         <!-- ERROR SECTION -->
         <div class="ascii-content">
             <div class="ascii-frame-inner">
-                <div class="error-message" style="color: var(--priority-1); border: 2px solid var(--priority-1); padding: 1rem; background: rgba(231, 76, 60, 0.1);">
+                <div class="error-message inline-error">
                     <strong>[ ! ] ERROR:</strong> <?php echo htmlspecialchars($error, ENT_QUOTES, 'UTF-8'); ?>
                 </div>
             </div>
@@ -109,7 +109,7 @@ $nonce = SecurityHeadersMiddleware::getNonce();
                         <input type="text" id="title" name="title" class="editable" required placeholder="Enter a descriptive title for this ticket">
                     </div>
                     <!-- Duplicate Warning Area -->
-                    <div id="duplicateWarning" role="alert" aria-live="polite" aria-atomic="true" style="display: none; margin-top: 1rem; padding: 1rem; border: 2px solid var(--terminal-amber); background: rgba(241, 196, 15, 0.1);">
+                    <div id="duplicateWarning" class="inline-warning" role="alert" aria-live="polite" aria-atomic="true" style="display: none; margin-top: 1rem;">
                         <div style="color: var(--terminal-amber); font-weight: bold; margin-bottom: 0.5rem;">
                             Possible Duplicates Found
                         </div>