feat: manage fruits — full CRUD with images and synonyms (story #02)

Backend: domain structs, FruitRepository interface + pg implementation,
9 Echo v4 handlers (list/get/create/update/delete, image sub-resources),
migration 000002 (fruit_type ENUM, fruits, fruit_synonyms, fruit_images),
route-scoped BodyLimit("5M") for uploads, http.DetectContentType for serving.

Frontend: typed fetch API layer, Pinia setup-style fruitStore, FruitList
(paginated), FruitCreate, and FruitDetail (edit + synonyms editor + image
gallery). 25 backend unit tests + integration test; 18 frontend tests.

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

frontend/src/views/FruitCreate.vue

@@ -0,0 +1,119 @@
+<script setup lang="ts">
+import { ref } from 'vue'
+import { useRouter } from 'vue-router'
+import { useFruitStore } from '../stores/fruitStore'
+import { FRUIT_TYPES } from '../api/fruits'
+
+const router = useRouter()
+const store = useFruitStore()
+
+const name = ref('')
+const osdbNumber = ref('')
+const comment = ref('')
+const fruitType = ref('')
+const synonymInput = ref('')
+const synonyms = ref<string[]>([])
+const submitting = ref(false)
+const serverError = ref<string | null>(null)
+
+function addSynonym() {
+  const s = synonymInput.value.trim()
+  if (s && !synonyms.value.includes(s)) {
+    synonyms.value.push(s)
+  }
+  synonymInput.value = ''
+}
+
+function removeSynonym(idx: number) {
+  synonyms.value.splice(idx, 1)
+}
+
+async function submit() {
+  serverError.value = null
+  submitting.value = true
+  try {
+    const fruit = await store.create({
+      name: name.value,
+      osdb_number: osdbNumber.value,
+      comment: comment.value || null,
+      fruit_type: fruitType.value,
+      synonyms: synonyms.value,
+    })
+    router.push(`/fruits/${fruit.id}`)
+  } catch (e) {
+    serverError.value = e instanceof Error ? e.message : 'Fehler beim Speichern'
+  } finally {
+    submitting.value = false
+  }
+}
+</script>
+
+<template>
+  <div class="p-6 max-w-2xl mx-auto">
+    <h1 class="text-2xl font-bold text-gray-900 mb-6">Neue Frucht anlegen</h1>
+
+    <div v-if="serverError" class="mb-4 p-3 bg-red-50 border border-red-300 rounded text-red-700 text-sm">
+      {{ serverError }}
+    </div>
+
+    <form @submit.prevent="submit" class="space-y-4">
+      <div>
+        <label class="block text-sm font-medium text-gray-700 mb-1">Name *</label>
+        <input v-model="name" type="text" required class="w-full border border-gray-300 rounded px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-500" />
+      </div>
+
+      <div>
+        <label class="block text-sm font-medium text-gray-700 mb-1">OSDB-Kürzel *</label>
+        <input v-model="osdbNumber" type="text" required class="w-full border border-gray-300 rounded px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-500" />
+      </div>
+
+      <div>
+        <label class="block text-sm font-medium text-gray-700 mb-1">Typ *</label>
+        <select v-model="fruitType" required class="w-full border border-gray-300 rounded px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-500">
+          <option value="" disabled>Bitte wählen...</option>
+          <option v-for="t in FRUIT_TYPES" :key="t" :value="t">{{ t }}</option>
+        </select>
+      </div>
+
+      <div>
+        <label class="block text-sm font-medium text-gray-700 mb-1">Kommentar</label>
+        <textarea v-model="comment" rows="3" class="w-full border border-gray-300 rounded px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-500" />
+      </div>
+
+      <div>
+        <label class="block text-sm font-medium text-gray-700 mb-1">Synonyme</label>
+        <div class="flex gap-2 mb-2">
+          <input
+            v-model="synonymInput"
+            type="text"
+            @keydown.enter.prevent="addSynonym"
+            placeholder="Synonym eingeben und Enter drücken"
+            class="flex-1 border border-gray-300 rounded px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-500"
+          />
+          <button type="button" @click="addSynonym" class="bg-gray-200 px-3 py-2 rounded hover:bg-gray-300">
+            +
+          </button>
+        </div>
+        <ul class="space-y-1">
+          <li v-for="(s, i) in synonyms" :key="i" class="flex items-center gap-2 text-sm">
+            <span class="flex-1 bg-gray-100 rounded px-2 py-1">{{ s }}</span>
+            <button type="button" @click="removeSynonym(i)" class="text-red-500 hover:text-red-700 text-xs">✕</button>
+          </li>
+        </ul>
+      </div>
+
+      <div class="flex gap-3 pt-2">
+        <button
+          type="submit"
+          :disabled="submitting"
+          class="bg-green-600 text-white px-6 py-2 rounded hover:bg-green-700 disabled:opacity-50 transition-colors"
+        >
+          {{ submitting ? 'Speichern...' : 'Anlegen' }}
+        </button>
+        <RouterLink to="/fruits" class="px-6 py-2 border rounded hover:bg-gray-50 transition-colors">
+          Abbrechen
+        </RouterLink>
+      </div>
+    </form>
+  </div>
+</template>