feat: German translations for TheMealDB recipes + recipe detail view

- Add GermanTranslator service with 200+ ingredient and meal name mappings
- Translate titles and ingredients when fetching from TheMealDB
- Add click-to-view recipe detail modal on week plan meal cards
- Import RecipeDetail component in WeekPlanView

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/views/WeekPlanView.vue

@@ -65,6 +65,7 @@
         :day-name="getDayName(entry.date)"
         @swap="openSwapModal(entry)"
         @reroll="handleReroll(entry)"
+        @click="selectedRecipe = entry.recipe"
       />
     </div>
 
@@ -98,6 +99,13 @@
     </div>
   </div>
 
+  <!-- Recipe detail modal -->
+  <RecipeDetail
+    v-if="selectedRecipe"
+    :recipe="selectedRecipe"
+    @close="selectedRecipe = null"
+  />
+
   <!-- Swap modal -->
   <SwapModal
     v-if="swapEntry && recipesStore.recipes.length"
@@ -110,14 +118,16 @@
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
 import MealCard from '../components/MealCard.vue'
+import RecipeDetail from '../components/RecipeDetail.vue'
 import SwapModal from '../components/SwapModal.vue'
 import { useMealPlanStore, useRecipesStore } from '../stores/mealPlan'
-import type { MealPlanEntry } from '../stores/mealPlan'
+import type { MealPlanEntry, Recipe } from '../stores/mealPlan'
 
 const store = useMealPlanStore()
 const recipesStore = useRecipesStore()
 
 const swapEntry = ref<MealPlanEntry | null>(null)
+const selectedRecipe = ref<Recipe | null>(null)
 
 const DAY_NAMES = ['Sonntag', 'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag']