fix(app): replace Vuetify 2 legacy props with proper V3 API

Replace deprecated V2 props that were being silently ignored:
- v-layout → v-row, grid-list-md removed, xs → cols on v-col
- v-tooltip top → location="top", v-list dense → density="compact"
- v-app-bar app/scroll-off-screen → scroll-behavior="hide"
- append-outer-icon → append-icon, remove primary-title
- headline class → text-h6, remove wrap from v-row

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

app/components/pages/events/event-page.vue

@@ -1,13 +1,13 @@
 <template>
   <div :key="isAuthenticated ? 'true' : 'false'">
-    <v-container :key="range" fluid grid-list-md class="app-fade-in">
-      <v-row v-if="!isAuthenticated" wrap>
-        <v-col xs="12">
+    <v-container :key="range" fluid class="app-fade-in">
+      <v-row v-if="!isAuthenticated">
+        <v-col cols="12">
           <p><b v-text="t('events.login')" /></p>
         </v-col>
       </v-row>
-      <v-row wrap>
-        <v-col xs="12">
+      <v-row>
+        <v-col cols="12">
           <v-text-field
             v-model="origin"
             variant="underlined"
@@ -16,7 +16,7 @@
             :placeholder="t('origins.geolocation')"
           >
             <template #append>
-              <v-tooltip top>
+              <v-tooltip location="top">
                 <template #activator="{ props }">
                   <v-icon
                     icon='mdi-crosshairs-gps'
@@ -28,7 +28,7 @@
               </v-tooltip>
             </template>
             <template #prepend>
-              <v-tooltip v-if="isAuthenticated" top>
+              <v-tooltip v-if="isAuthenticated" location="top">
                 <template #activator="{ props }">
                   <v-icon
                     icon='mdi-bookmark-plus-outline'
@@ -43,7 +43,7 @@
           </v-text-field>
         </v-col>
       </v-row>
-      <v-row wrap>
+      <v-row>
         <v-col>
           <v-btn-toggle
             v-if="smAndUp"
@@ -65,12 +65,12 @@
           />
         </v-col>
       </v-row>
-      <v-row wrap>
+      <v-row>
         <v-col cols="12" sm="8">
           <v-text-field
             v-model="state.search"
             variant="underlined"
-            append-outer-icon="mdi-magnify"
+            append-icon="mdi-magnify"
             :label="t('events.filter')"
             :placeholder="t('events.filter')"
             hide-details