Add auto-refresh toggle and tab persistence via URL hash

- Auto-refresh checkbox with configurable interval (30s-5min)
- URL hash (#support, #customers etc.) persists active tab on refresh
- switchToTab() centralized function for tab switching
- Logo click uses same function

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

index.html

@@ -265,6 +265,15 @@
                             <input type="checkbox" id="ticket-show-closed"> Suljetut
                         </label>
                         <button class="btn-secondary" id="btn-ticket-rules" style="padding:7px 14px;font-size:0.82rem;">&#9881; Säännöt</button>
+                        <label style="display:flex;align-items:center;gap:0.4rem;font-size:0.82rem;color:#777;cursor:pointer;white-space:nowrap;margin-left:auto;">
+                            <input type="checkbox" id="ticket-auto-refresh"> Autopäivitys
+                            <select id="ticket-refresh-interval" style="padding:3px 6px;border:1px solid #ddd;border-radius:5px;font-size:0.8rem;">
+                                <option value="30">30s</option>
+                                <option value="60" selected>1 min</option>
+                                <option value="120">2 min</option>
+                                <option value="300">5 min</option>
+                            </select>
+                        </label>
                     </div>
                     <div id="ticket-fetch-status" style="display:none;padding:0.75rem 1rem;border-radius:8px;margin-bottom:1rem;font-size:0.9rem;"></div>
                     <div id="bulk-actions-toolbar" style="display:none;align-items:center;gap:0.75rem;padding:0.6rem 1rem;background:#fff3cd;border:1px solid #ffc107;border-radius:8px;margin-bottom:0.75rem;font-size:0.85rem;">