Feature: Bottom-Nav umgebaut, Dog-Avatar→Welcome, Routen-Filter-Panel, Recording-Fix

- Bottom-Nav: Tagebuch | Routen | [+] | Forum | Benachrichtigungen (mit Badge)
- Benachrichtigungs-Badge auch in Bottom-Nav (notif-nav-badge)
- Dog-Avatar-Klick → Welcome-Seite (Name bleibt → Hund-Profil)
- Routen: Filter in aufklappbarem Panel, aktive Filter zeigen roten Punkt
- Routen: Start/Stop-Button fragt Page_map.isRecording() ab, kein veralteter lokaler State
- SW by-v232, APP_VER 209

backend/static/index.html

@@ -284,24 +284,24 @@
       <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#book-open"></use></svg>
       <span class="nav-item-label">Tagebuch</span>
     </div>
-    <div class="nav-item" data-page="health">
-      <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#first-aid"></use></svg>
-      <span class="nav-item-label">Gesundheit</span>
+    <div class="nav-item" data-page="routes">
+      <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#path"></use></svg>
+      <span class="nav-item-label">Routen</span>
     </div>
     <!-- Mittlerer + Button -->
     <div class="nav-item nav-item-center" id="nav-add">
       <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#plus"></use></svg>
     </div>
-    <div class="nav-item" data-page="poison">
-      <span style="position:relative;display:inline-flex">
-        <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#warning-octagon"></use></svg>
-        <span class="nav-badge hidden" id="poison-nav-badge">0</span>
-      </span>
-      <span class="nav-item-label">Alarm</span>
+    <div class="nav-item" data-page="forum">
+      <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#push-pin"></use></svg>
+      <span class="nav-item-label">Forum</span>
     </div>
-    <div class="nav-item" data-page="settings">
-      <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#gear"></use></svg>
-      <span class="nav-item-label">Ich</span>
+    <div class="nav-item" data-page="notifications">
+      <span style="position:relative;display:inline-flex">
+        <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#bell"></use></svg>
+        <span class="nav-badge hidden" id="notif-nav-badge">0</span>
+      </span>
+      <span class="nav-item-label">Benachrichtigungen</span>
     </div>
   </nav>