FEAT-NAMEGEN UC-1: 'Name vorschlagen'-Panel auf GerbilFormPage

- api/names.ts: suggestNames() + buildSuggestPath() + NAMEGEN_USAGES (norn/japa/mythg/ger/arb)
- de.ts: namegen-Sektion (button, panelTitle, letter/usages/load/states)
- NameSuggestPanel.tsx: inline-Panel mit Buchstabe/Herkunftskultur-Multiselect, Vorschlagsliste; 503 NamesKeyMissing → freundlicher Hinweis
- GerbilFormPage: 'Name vorschlagen'-Button neben Namensfeld (htmlFor-Pattern), Panel schließt+befüllt bei Auswahl
- vitest: 11 Tests (buildSuggestPath URL-Logik + NAMEGEN_USAGES-Struktur)
- e2e: mock /names/suggest + namesConfigured-Flag; 4 Specs (Panel öffnen, Klick befüllt, Buchstabe-Filter, 503-Fallback)

Gate: vitest 104/104, e2e 156/156, tsc clean

gerbil-manager-web/src/api/__tests__/names.test.ts

@@ -0,0 +1,73 @@
+/** FEAT-NAMEGEN: Tests für buildSuggestPath + NAMEGEN_USAGES. */
+import { describe, expect, it } from 'vitest'
+import { buildSuggestPath, NAMEGEN_USAGES } from '../names'
+
+describe('buildSuggestPath', () => {
+  it('includes uppercased letter', () => {
+    const path = buildSuggestPath({ letter: 'f', gender: 'female', usages: ['norn'] })
+    expect(path).toContain('letter=F')
+  })
+
+  it('omits letter when blank', () => {
+    const path = buildSuggestPath({ letter: '', usages: ['norn'] })
+    expect(path).not.toContain('letter=')
+  })
+
+  it('omits letter when only whitespace', () => {
+    const path = buildSuggestPath({ letter: '  ', usages: ['norn'] })
+    expect(path).not.toContain('letter=')
+  })
+
+  it('includes gender', () => {
+    const path = buildSuggestPath({ gender: 'male', usages: ['norn'] })
+    expect(path).toContain('gender=male')
+  })
+
+  it('omits gender for empty string', () => {
+    const path = buildSuggestPath({ gender: '', usages: ['norn'] })
+    expect(path).not.toContain('gender=')
+  })
+
+  it('joins multiple usages without encoding commas', () => {
+    const path = buildSuggestPath({ usages: ['norn', 'mythg'] })
+    expect(path).toContain('usages=norn,mythg')
+  })
+
+  it('omits usages when array is empty', () => {
+    const path = buildSuggestPath({ usages: [] })
+    expect(path).not.toContain('usages=')
+  })
+
+  it('defaults count to 6', () => {
+    const path = buildSuggestPath({ usages: ['norn'] })
+    expect(path).toContain('count=6')
+  })
+
+  it('uses provided count', () => {
+    const path = buildSuggestPath({ usages: ['norn'], count: 8 })
+    expect(path).toContain('count=8')
+  })
+
+  it('starts with /names/suggest', () => {
+    const path = buildSuggestPath({ usages: ['norn'] })
+    expect(path).toMatch(/^\/names\/suggest\?/)
+  })
+})
+
+describe('NAMEGEN_USAGES', () => {
+  it('contains all 5 expected culture codes', () => {
+    const codes = NAMEGEN_USAGES.map((u) => u.code)
+    expect(codes).toContain('norn')
+    expect(codes).toContain('japa')
+    expect(codes).toContain('mythg')
+    expect(codes).toContain('ger')
+    expect(codes).toContain('arb')
+    expect(codes).toHaveLength(5)
+  })
+
+  it('every usage has a non-empty label', () => {
+    for (const u of NAMEGEN_USAGES) {
+      expect(u.label.length).toBeGreaterThan(0)
+    }
+  })
+})

gerbil-manager-web/src/api/names.ts

@@ -0,0 +1,40 @@
+/** FEAT-NAMEGEN: Namensvorschläge — Schnittstelle zum Backend /names/suggest. */
+import { api } from './client'
+
+export interface NameSuggestion {
+  name: string
+  meaning: string
+  origin: string
+}
+
+export const NAMEGEN_USAGES = [
+  { code: 'norn', label: 'Nordisch' },
+  { code: 'japa', label: 'Japanisch' },
+  { code: 'mythg', label: 'Griech. Mythologie' },
+  { code: 'ger', label: 'Deutsch' },
+  { code: 'arb', label: 'Arabisch' },
+] as const
+
+export type NamegenUsageCode = (typeof NAMEGEN_USAGES)[number]['code']
+
+export interface SuggestNamesParams {
+  letter?: string
+  gender?: string
+  usages: NamegenUsageCode[]
+  count?: number
+}
+
+/** Exported for unit tests — builds the query path without a network call. */
+export function buildSuggestPath(params: SuggestNamesParams): string {
+  const parts: string[] = []
+  const letter = params.letter?.trim().toUpperCase()
+  if (letter) parts.push(`letter=${encodeURIComponent(letter)}`)
+  if (params.gender && params.gender !== '') parts.push(`gender=${encodeURIComponent(params.gender)}`)
+  if (params.usages.length > 0) parts.push(`usages=${params.usages.join(',')}`)
+  parts.push(`count=${params.count ?? 6}`)
+  return `/names/suggest?${parts.join('&')}`
+}
+
+export function suggestNames(params: SuggestNamesParams): Promise<NameSuggestion[]> {
+  return api.get<NameSuggestion[]>(buildSuggestPath(params))
+}

gerbil-manager-web/src/components/NameSuggestPanel.css

@@ -0,0 +1,114 @@
+.namegen-name-row {
+  display: flex;
+  gap: 0.5rem;
+  align-items: center;
+}
+
+.namegen-name-row .input {
+  flex: 1;
+  min-width: 0;
+}
+
+.namegen-panel {
+  border: 1px solid var(--color-border);
+  border-radius: 0.5rem;
+  padding: 1rem;
+  margin-bottom: 1rem;
+  background: var(--color-bg, #fff);
+}
+
+.namegen-panel__header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 0.75rem;
+  font-weight: 600;
+}
+
+.namegen-panel__filters {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 1rem;
+  align-items: flex-start;
+  margin-bottom: 0.75rem;
+}
+
+.namegen-panel__letter {
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.namegen-panel__letter-input {
+  width: 5rem;
+}
+
+.namegen-panel__usages {
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.namegen-usages-grid {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.4rem 1rem;
+}
+
+.namegen-usages-grid label {
+  display: flex;
+  align-items: center;
+  gap: 0.3rem;
+  font-size: 0.9rem;
+  cursor: pointer;
+}
+
+.namegen-suggestions {
+  list-style: none;
+  margin: 0.75rem 0 0;
+  padding: 0;
+  border-top: 1px solid var(--color-border);
+}
+
+.namegen-suggestion {
+  display: flex;
+  align-items: baseline;
+  gap: 0.5rem;
+  padding: 0.5rem 0;
+  border-bottom: 1px solid var(--color-border);
+  flex-wrap: wrap;
+}
+
+.namegen-suggestion:last-child {
+  border-bottom: none;
+}
+
+.namegen-suggestion__pick {
+  font-weight: 600;
+  color: var(--color-accent, #2563eb);
+  background: none;
+  border: none;
+  padding: 0;
+  cursor: pointer;
+  text-align: left;
+  font-size: inherit;
+  font-family: inherit;
+  min-width: 6rem;
+}
+
+.namegen-suggestion__pick:hover {
+  text-decoration: underline;
+}
+
+.namegen-suggestion__meaning {
+  flex: 1;
+  font-size: 0.88rem;
+  color: var(--color-text-muted);
+  min-width: 8rem;
+}
+
+.namegen-suggestion__origin {
+  font-size: 0.85rem;
+  color: var(--color-text-muted);
+  white-space: nowrap;
+}

gerbil-manager-web/src/components/NameSuggestPanel.tsx

@@ -0,0 +1,132 @@
+import { useState } from 'react'
+import { de } from '../strings/de'
+import { ApiError, errorCode } from '../api/client'
+import { NAMEGEN_USAGES, suggestNames, type NamegenUsageCode, type NameSuggestion } from '../api/names'
+import './NameSuggestPanel.css'
+
+interface NameSuggestPanelProps {
+  gender: string
+  onPick: (name: string) => void
+  onClose: () => void
+}
+
+const ALL_CODES = NAMEGEN_USAGES.map((u) => u.code) as NamegenUsageCode[]
+
+export default function NameSuggestPanel({ gender, onPick, onClose }: NameSuggestPanelProps) {
+  const t = de.namegen
+  const [letter, setLetter] = useState('')
+  const [usages, setUsages] = useState<Set<NamegenUsageCode>>(new Set(ALL_CODES))
+  const [loading, setLoading] = useState(false)
+  const [keyMissing, setKeyMissing] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [suggestions, setSuggestions] = useState<NameSuggestion[]>([])
+  const [fetched, setFetched] = useState(false)
+
+  function toggleUsage(code: NamegenUsageCode) {
+    setUsages((prev) => {
+      const next = new Set(prev)
+      if (next.has(code)) next.delete(code)
+      else next.add(code)
+      return next
+    })
+  }
+
+  async function load() {
+    setLoading(true)
+    setError(null)
+    setKeyMissing(false)
+    setSuggestions([])
+    try {
+      const result = await suggestNames({
+        letter: letter.trim() || undefined,
+        gender: gender || undefined,
+        usages: [...usages] as NamegenUsageCode[],
+        count: 6,
+      })
+      setSuggestions(result)
+      setFetched(true)
+    } catch (err) {
+      if (errorCode(err) === 'NamesKeyMissing') {
+        setKeyMissing(true)
+      } else {
+        setError(err instanceof ApiError ? err.message : de.api.errors.unknown)
+      }
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  return (
+    <div className="namegen-panel" role="region" aria-label={t.panelTitle}>
+      <div className="namegen-panel__header">
+        <span>{t.panelTitle}</span>
+        <button type="button" className="btn" onClick={onClose} aria-label={t.close}>
+          ✕
+        </button>
+      </div>
+
+      <div className="namegen-panel__filters">
+        <div className="namegen-panel__letter">
+          <label htmlFor="namegen-letter">{t.letterLabel}</label>
+          <input
+            id="namegen-letter"
+            className="input namegen-panel__letter-input"
+            value={letter}
+            onChange={(e) => setLetter(e.target.value)}
+            placeholder={t.letterPlaceholder}
+            maxLength={1}
+          />
+        </div>
+
+        <div className="namegen-panel__usages">
+          <span>{t.usagesLabel}</span>
+          <div className="namegen-usages-grid">
+            {NAMEGEN_USAGES.map(({ code, label }) => (
+              <label key={code}>
+                <input
+                  type="checkbox"
+                  checked={usages.has(code)}
+                  onChange={() => toggleUsage(code)}
+                />
+                {label}
+              </label>
+            ))}
+          </div>
+        </div>
+      </div>
+
+      <button
+        type="button"
+        className="btn btn--primary"
+        onClick={load}
+        disabled={loading || usages.size === 0}
+      >
+        {loading ? t.loading : t.loadButton}
+      </button>
+
+      {keyMissing && <p className="muted">{t.keyMissing}</p>}
+      {error && <p className="error-text">{error}</p>}
+      {fetched && !loading && !keyMissing && !error && suggestions.length === 0 && (
+        <p className="muted">{t.empty}</p>
+      )}
+
+      {suggestions.length > 0 && (
+        <ul className="namegen-suggestions" aria-label={t.panelTitle}>
+          {suggestions.map((s, i) => (
+            <li key={`${s.name}-${i}`} className="namegen-suggestion">
+              <button
+                type="button"
+                className="namegen-suggestion__pick"
+                onClick={() => onPick(s.name)}
+              >
+                {s.name}
+              </button>
+              <span className="namegen-suggestion__meaning">{s.meaning}</span>
+              <span className="namegen-suggestion__origin">{s.origin}</span>
+            </li>
+          ))}
+        </ul>
+      )}
+    </div>
+  )
+}

gerbil-manager-web/src/pages/GerbilFormPage.tsx

@@ -8,6 +8,8 @@ import { useApi, useMutation } from '../hooks/useApi'
 import { genderLabel, statusLabel } from '../format/labels'
 import { fromDisplayString } from '../genetics'
 import FarbschlagImage from '../components/FarbschlagImage'
+import NameSuggestPanel from '../components/NameSuggestPanel'
+import '../components/NameSuggestPanel.css'
 
 interface FormState {
   name: string
@@ -111,6 +113,7 @@ export default function GerbilFormPage() {
   const [form, setForm] = useState<FormState>(EMPTY)
   const [errors, setErrors] = useState<Partial<Record<keyof FormState, string>>>({})
   const [initializedFor, setInitializedFor] = useState<string | null>(null)
+  const [showNameSuggest, setShowNameSuggest] = useState(false)
 
   const existing = useApi(() => (id ? getGerbil(id) : Promise.resolve(null)), [id])
   const colorVarieties = useApi(() => listColorVarieties(), [])
@@ -197,16 +200,33 @@ export default function GerbilFormPage() {
       <h2>{isEdit ? t.form.editTitle : t.form.createTitle}</h2>
 
       <form className="form" onSubmit={onSubmit} noValidate>
-        <label className="field">
-          <span>{t.fields.name} *</span>
-          <input
-            className="input"
-            value={form.name}
-            onChange={(e) => set('name', e.target.value)}
-            aria-invalid={Boolean(errors.name)}
-          />
+        <div className="field">
+          <label htmlFor="gerbil-name">{t.fields.name} *</label>
+          <div className="namegen-name-row">
+            <input
+              id="gerbil-name"
+              className="input"
+              value={form.name}
+              onChange={(e) => set('name', e.target.value)}
+              aria-invalid={Boolean(errors.name)}
+            />
+            <button
+              type="button"
+              className="btn"
+              onClick={() => setShowNameSuggest((v) => !v)}
+            >
+              {de.namegen.button}
+            </button>
+          </div>
           {errors.name && <small className="error-text">{errors.name}</small>}
-        </label>
+        </div>
+        {showNameSuggest && (
+          <NameSuggestPanel
+            gender={form.gender}
+            onPick={(name) => { set('name', name); setShowNameSuggest(false) }}
+            onClose={() => setShowNameSuggest(false)}
+          />
+        )}
 
         <label className="field">
           <span>{t.fields.gender} *</span>

gerbil-manager-web/src/strings/de.ts

@@ -813,6 +813,19 @@ export const de = {
     resetButton: 'Filter zurücksetzen',
     closeButton: 'Schließen',
   },
+  // ── FEAT-NAMEGEN: Namensvorschläge (KI-gestützt, UC-1 Einzeltier) ──
+  namegen: {
+    button: 'Name vorschlagen',
+    panelTitle: 'Namensvorschläge',
+    letterLabel: 'Anfangsbuchstabe',
+    letterPlaceholder: 'z. B. A',
+    usagesLabel: 'Herkunftskultur',
+    loadButton: 'Vorschläge laden',
+    loading: 'Lade Vorschläge …',
+    empty: 'Keine Vorschläge — andere Einstellungen versuchen.',
+    keyMissing: 'Namensvorschläge benötigen einen API-Key — bitte in den Einstellungen konfigurieren.',
+    close: 'Schließen',
+  },
 } as const
 
 export type Strings = typeof de