Mehrere EAN-Codes je Produkt und je Gruppe (mit Notiz) + Gruppen umbenennen

Barcodes:
- Neue Tabelle barcodes (code, note, product_id ODER group_id). Damit lassen sich
  einem Produkt mehrere Codes geben und einer Gruppe beliebig viele Marken
  zuordnen (z.B. alle Mehlmarken zu "Mehl"). Je Code eine Notiz wie
  "Mehl bei Aldi".
- Lookup loest jetzt auch Alias-Codes auf; ist ein Code einer Gruppe zugeordnet,
  liefert die API group_id/group_name zurueck. Beim Anlegen aus einem Scan wird
  diese Gruppe automatisch gesetzt (Vorrang vor dem Kategorie-Rateversuch).
- Endpunkte: POST/DELETE /products/{id}/barcodes und /groups/{id}/barcodes.
- Web: wiederverwendbare BarcodeList-Komponente, eingebunden im Produktformular
  und auf der Gruppen-Seite.

Gruppen:
- Namen lassen sich jetzt direkt in der Tabelle aendern (PATCH war vorhanden,
  nur die Oberflaeche fehlte).

UI-Fix: Auswahlfelder in Tabellen richten sich nach ihrem Text statt nach der
Zellenbreite (Gruppen-/Benutzer-Dropdowns waren abgeschnitten).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/crud.py

@@ -7,8 +7,8 @@ from datetime import date
 from fastapi import HTTPException, status
 from sqlalchemy.orm import Session
 
-from .models import Lot, Product
-from .schemas import ProductOut
+from .models import Barcode, Lot, Product
+from .schemas import BarcodeOut, ProductOut
 from .services.conversion import KIND_OF_BASE, display_unit_info
 from .services.stock import current_stock
 
@@ -26,6 +26,10 @@ def product_to_out(db: Session, product: Product) -> ProductOut:
         )
         .count()
     )
+    out.barcodes = [
+        BarcodeOut.model_validate(b)
+        for b in db.query(Barcode).filter(Barcode.product_id == product.id).order_by(Barcode.id).all()
+    ]
     out.kind = KIND_OF_BASE[product.base_unit].value
     name, factor = display_unit_info(product)
     out.unit_name = name

backend/app/models.py

@@ -146,6 +146,28 @@ class Product(Base):
     )
 
 
+class Barcode(Base):
+    """Zusätzliche EAN-Codes für ein Produkt ODER eine Gruppe.
+
+    Beispiel Gruppe "Mehl": alle Mehl-Marken einscannen; ein Scan ordnet das
+    Produkt dann automatisch dieser Gruppe zu.
+    """
+
+    __tablename__ = "barcodes"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    code: Mapped[str] = mapped_column(String(64), unique=True, index=True, nullable=False)
+    # Freitext zur Einordnung, z.B. "Mehl bei Aldi"
+    note: Mapped[str | None] = mapped_column(String(120), nullable=True)
+    product_id: Mapped[int | None] = mapped_column(
+        ForeignKey("products.id", ondelete="CASCADE"), nullable=True
+    )
+    group_id: Mapped[int | None] = mapped_column(
+        ForeignKey("groups.id", ondelete="CASCADE"), nullable=True
+    )
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
+
+
 class Lot(Base):
     __tablename__ = "lots"
 

backend/app/routers/groups.py

@@ -3,8 +3,8 @@ from sqlalchemy.orm import Session
 
 from ..database import get_db
 from ..deps import get_current_user, require_admin
-from ..models import Group, Product, User
-from ..schemas import GroupCreate, GroupOut, GroupUpdate
+from ..models import Barcode, Group, Product, User
+from ..schemas import BarcodeCreate, BarcodeOut, GroupCreate, GroupOut, GroupUpdate
 from ..services.conversion import BASE_OF_KIND
 from ..services.stock import current_stock
 
@@ -15,6 +15,10 @@ def _group_to_out(db: Session, group: Group) -> GroupOut:
     out = GroupOut.model_validate(group)
     products = db.query(Product).filter(Product.group_id == group.id).all()
     out.product_count = len(products)
+    out.barcodes = [
+        BarcodeOut.model_validate(b)
+        for b in db.query(Barcode).filter(Barcode.group_id == group.id).order_by(Barcode.id).all()
+    ]
     unit = group.min_stock_unit
     if unit is not None:
         # Bestand nur über Produkte gleicher Art, in der Gruppen-Einheit ausgedrückt.
@@ -82,6 +86,44 @@ def update_group(
     return _group_to_out(db, group)
 
 
+@router.post("/{group_id}/barcodes", response_model=GroupOut, status_code=status.HTTP_201_CREATED)
+def add_group_barcode(
+    group_id: int,
+    payload: BarcodeCreate,
+    db: Session = Depends(get_db),
+    _: User = Depends(require_admin),
+) -> GroupOut:
+    """EAN einer Gruppe zuordnen (z.B. alle Mehl-Marken zur Gruppe "Mehl")."""
+    group = db.get(Group, group_id)
+    if group is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, "Gruppe nicht gefunden")
+    code = payload.code.strip()
+    if db.query(Barcode).filter(Barcode.code == code).first() or (
+        db.query(Product).filter(Product.barcode == code).first()
+    ):
+        raise HTTPException(status.HTTP_409_CONFLICT, "Dieser Code ist bereits vergeben")
+    db.add(Barcode(code=code, note=(payload.note or None), group_id=group.id))
+    db.commit()
+    db.refresh(group)
+    return _group_to_out(db, group)
+
+
+@router.delete("/{group_id}/barcodes/{code}", status_code=status.HTTP_204_NO_CONTENT)
+def delete_group_barcode(
+    group_id: int,
+    code: str,
+    db: Session = Depends(get_db),
+    _: User = Depends(require_admin),
+) -> None:
+    entry = (
+        db.query(Barcode).filter(Barcode.group_id == group_id, Barcode.code == code).first()
+    )
+    if entry is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, "Code nicht gefunden")
+    db.delete(entry)
+    db.commit()
+
+
 @router.delete("/{group_id}", status_code=status.HTTP_204_NO_CONTENT)
 def delete_group(
     group_id: int,

backend/app/routers/products.py

@@ -4,9 +4,9 @@ from sqlalchemy.orm import Session
 from ..crud import product_to_out
 from ..database import get_db
 from ..deps import get_current_user, require_admin
-from ..models import BaseUnit, Product, User
+from ..models import Barcode, BaseUnit, Group, Product, User
 from ..off import lookup_barcode
-from ..schemas import LookupResult, ProductCreate, ProductOut, ProductUpdate
+from ..schemas import BarcodeCreate, LookupResult, ProductCreate, ProductOut, ProductUpdate
 from ..services.conversion import ConversionError, resolve_product_unit
 
 router = APIRouter(prefix="/products", tags=["products"])
@@ -32,15 +32,31 @@ def lookup(
     db: Session = Depends(get_db),
     _: User = Depends(get_current_user),
 ) -> LookupResult:
-    """Barcode: erst lokal, dann Open Food Facts. Nur Vorschlag, legt nichts an."""
-    existing = db.query(Product).filter(Product.barcode == barcode).first()
+    """Barcode auflösen: Produkt (Haupt- oder Alias-Code), Gruppen-Code, sonst OFF."""
+    code = barcode.strip()
+
+    existing = db.query(Product).filter(Product.barcode == code).first()
+    if existing is None:
+        alias = db.query(Barcode).filter(Barcode.code == code).first()
+        if alias is not None and alias.product_id:
+            existing = db.get(Product, alias.product_id)
     if existing:
         return LookupResult(found=True, existing_product=product_to_out(db, existing))
 
-    suggestion = lookup_barcode(barcode)
+    # Code kann einer Gruppe zugeordnet sein (z.B. alle Mehl-Marken in "Mehl").
+    group_id = group_name = None
+    alias = db.query(Barcode).filter(Barcode.code == code).first()
+    if alias is not None and alias.group_id:
+        group = db.get(Group, alias.group_id)
+        if group is not None:
+            group_id, group_name = group.id, group.name
+
+    suggestion = lookup_barcode(code)
     if suggestion:
-        return LookupResult(found=True, suggestion=suggestion)
-    return LookupResult(found=False)
+        return LookupResult(
+            found=True, suggestion=suggestion, group_id=group_id, group_name=group_name
+        )
+    return LookupResult(found=False, group_id=group_id, group_name=group_name)
 
 
 @router.get("/{product_id}", response_model=ProductOut)
@@ -137,6 +153,46 @@ def update_product(
     return product_to_out(db, product)
 
 
+@router.post("/{product_id}/barcodes", response_model=ProductOut, status_code=status.HTTP_201_CREATED)
+def add_product_barcode(
+    product_id: int,
+    payload: BarcodeCreate,
+    db: Session = Depends(get_db),
+    _: User = Depends(require_admin),
+) -> ProductOut:
+    """Weiteren EAN-Code zu einem Produkt hinzufügen."""
+    product = db.get(Product, product_id)
+    if product is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, "Produkt nicht gefunden")
+    code = payload.code.strip()
+    if db.query(Barcode).filter(Barcode.code == code).first() or (
+        db.query(Product).filter(Product.barcode == code).first()
+    ):
+        raise HTTPException(status.HTTP_409_CONFLICT, "Dieser Code ist bereits vergeben")
+    db.add(Barcode(code=code, note=(payload.note or None), product_id=product.id))
+    db.commit()
+    db.refresh(product)
+    return product_to_out(db, product)
+
+
+@router.delete("/{product_id}/barcodes/{code}", status_code=status.HTTP_204_NO_CONTENT)
+def delete_product_barcode(
+    product_id: int,
+    code: str,
+    db: Session = Depends(get_db),
+    _: User = Depends(require_admin),
+) -> None:
+    entry = (
+        db.query(Barcode)
+        .filter(Barcode.product_id == product_id, Barcode.code == code)
+        .first()
+    )
+    if entry is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, "Code nicht gefunden")
+    db.delete(entry)
+    db.commit()
+
+
 @router.delete("/{product_id}", status_code=status.HTTP_204_NO_CONTENT)
 def delete_product(
     product_id: int,

backend/app/schemas.py

@@ -23,6 +23,14 @@ class UnitCreate(BaseModel):
     factor: float = Field(gt=0)
 
 
+# ---- Barcodes ----
+class BarcodeOut(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+    id: int
+    code: str
+    note: str | None = None
+
+
 # ---- Auth / Users ----
 class Token(BaseModel):
     access_token: str
@@ -62,6 +70,7 @@ class GroupOut(BaseModel):
     stock: float = 0.0            # Bestand in Basiseinheiten
     min_stock_unit_name: str | None = None
     kind: str | None = None       # Art der Mindestbestand-Einheit
+    barcodes: list[BarcodeOut] = []   # EANs, die dieser Gruppe zugeordnet sind
 
 
 class GroupCreate(BaseModel):
@@ -153,12 +162,22 @@ class ProductOut(BaseModel):
     # Mindestbestand in der erfassten Einheit (für die Anzeige):
     min_stock_display: float | None = None
     min_stock_unit_label: str = ""
+    # Zusätzliche EAN-Codes (neben dem Haupt-Barcode):
+    barcodes: list[BarcodeOut] = []
 
 
 class LookupResult(BaseModel):
     found: bool
     existing_product: ProductOut | None = None
     suggestion: dict | None = None
+    # Ist der Code einer Gruppe zugeordnet (z.B. "Mehl"), wird sie hier gemeldet.
+    group_id: int | None = None
+    group_name: str | None = None
+
+
+class BarcodeCreate(BaseModel):
+    code: str = Field(min_length=4, max_length=64)
+    note: str | None = Field(default=None, max_length=120)
 
 
 # ---- Stock movements ----

web/src/api.js

@@ -104,6 +104,9 @@ export const api = {
   createProduct: (body) => request("/products", { method: "POST", body }),
   updateProduct: (id, body) => request(`/products/${id}`, { method: "PATCH", body }),
   deleteProduct: (id) => request(`/products/${id}`, { method: "DELETE" }),
+  addProductBarcode: (id, body) => request(`/products/${id}/barcodes`, { method: "POST", body }),
+  deleteProductBarcode: (id, code) =>
+    request(`/products/${id}/barcodes/${encodeURIComponent(code)}`, { method: "DELETE" }),
 
   // Bestand
   checkIn: (body) => request("/stock/checkin", { method: "POST", body }),
@@ -129,6 +132,9 @@ export const api = {
   createGroup: (body) => request("/groups", { method: "POST", body }),
   updateGroup: (id, body) => request(`/groups/${id}`, { method: "PATCH", body }),
   deleteGroup: (id) => request(`/groups/${id}`, { method: "DELETE" }),
+  addGroupBarcode: (id, body) => request(`/groups/${id}/barcodes`, { method: "POST", body }),
+  deleteGroupBarcode: (id, code) =>
+    request(`/groups/${id}/barcodes/${encodeURIComponent(code)}`, { method: "DELETE" }),
 
   // Export / Import
   exportCsv: () => downloadFile("/export/stock.csv", "bestand.csv"),

web/src/components/BarcodeList.jsx

@@ -0,0 +1,60 @@
+import { useState } from "react";
+import Icon from "./Icon";
+
+/**
+ * Liste zusätzlicher EAN-Codes mit Notiz ("Mehl bei Aldi").
+ * onAdd({ code, note }) und onDelete(code) werden vom Aufrufer bereitgestellt.
+ */
+export default function BarcodeList({ barcodes = [], onAdd, onDelete, disabled = false, hint }) {
+  const [code, setCode] = useState("");
+  const [note, setNote] = useState("");
+  const [busy, setBusy] = useState(false);
+
+  async function add(e) {
+    e.preventDefault();
+    if (!code.trim()) return;
+    setBusy(true);
+    try {
+      await onAdd({ code: code.trim(), note: note.trim() || null });
+      setCode("");
+      setNote("");
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  return (
+    <div>
+      <ul className="simple-list">
+        {barcodes.map((b) => (
+          <li key={b.id ?? b.code}>
+            <span style={{ display: "flex", alignItems: "center", gap: 8, minWidth: 0 }}>
+              <code className="strong">{b.code}</code>
+              {b.note && <span className="muted small">{b.note}</span>}
+            </span>
+            {!disabled && (
+              <button className="btn-icon danger" title="Code entfernen"
+                onClick={() => onDelete(b.code)}>
+                <Icon name="trash" size={16} />
+              </button>
+            )}
+          </li>
+        ))}
+        {barcodes.length === 0 && <li className="muted small">Noch keine zusätzlichen Codes.</li>}
+      </ul>
+
+      {!disabled && (
+        <form className="field-inline" onSubmit={add} style={{ marginTop: "var(--sp-3)" }}>
+          <input placeholder="EAN scannen oder eingeben" value={code}
+            onChange={(e) => setCode(e.target.value)} />
+          <input placeholder="Notiz, z.B. Mehl bei Aldi" value={note}
+            onChange={(e) => setNote(e.target.value)} />
+          <button className="btn" disabled={busy || !code.trim()}>
+            <Icon name="plus" size={16} />Hinzufügen
+          </button>
+        </form>
+      )}
+      {hint && <p className="muted small">{hint}</p>}
+    </div>
+  );
+}

web/src/pages/CheckIn.jsx

@@ -13,6 +13,8 @@ export default function CheckIn() {
   const [barcode, setBarcode] = useState("");
   const [product, setProduct] = useState(null);
   const [suggestion, setSuggestion] = useState(null);
+  // Gruppe, die diesem Code zugeordnet ist (z.B. alle Mehl-Marken in "Mehl").
+  const [suggestionGroup, setSuggestionGroup] = useState({ id: "", name: "" });
   const [unknownBarcode, setUnknownBarcode] = useState(null);
   const [results, setResults] = useState([]);
   const [search, setSearch] = useState("");
@@ -60,8 +62,10 @@ export default function CheckIn() {
         setInfo(`Produkt erkannt: ${res.existing_product.name}`);
       } else if (res.found && res.suggestion) {
         setSuggestion(res.suggestion);
+        setSuggestionGroup({ id: res.group_id ? String(res.group_id) : "", name: res.group_name || "" });
       } else {
         setUnknownBarcode(barcode.trim());
+        setSuggestionGroup({ id: res.group_id ? String(res.group_id) : "", name: res.group_name || "" });
       }
     } catch (err) {
       setError(err.message);
@@ -71,7 +75,9 @@ export default function CheckIn() {
   async function createFromSuggestion() {
     setError(null); setBusy(true);
     try {
-      const payload = suggestionToProduct(suggestion, guessGroup(groups, suggestion));
+      // Ist der Code einer Gruppe zugeordnet, hat das Vorrang vor dem Kategorie-Rateversuch.
+      const groupId = suggestionGroup.id || guessGroup(groups, suggestion);
+      const payload = suggestionToProduct(suggestion, groupId);
       const created = await api.createProduct(payload);
       selectProduct(created);
       setInfo(`Produkt "${created.name}" angelegt.`);
@@ -163,7 +169,10 @@ export default function CheckIn() {
                     {suggestion.brand ? `${suggestion.brand} · ` : ""}auf Open Food Facts gefunden
                     {suggestion.quantity_text ? ` · ${suggestion.quantity_text}` : ""}
                   </div>
-                  <div className="muted small">Noch nicht im Katalog.</div>
+                  <div className="muted small">
+                    Noch nicht im Katalog.
+                    {suggestionGroup.name && ` Gruppe: ${suggestionGroup.name}`}
+                  </div>
                 </div>
                 {isAdmin ? (
                   <button className="btn primary" onClick={createFromSuggestion} disabled={busy}>

web/src/pages/Groups.jsx

@@ -1,6 +1,7 @@
 import { useEffect, useState } from "react";
 import { api } from "../api";
 import { useAuth } from "../auth";
+import BarcodeList from "../components/BarcodeList";
 import Icon from "../components/Icon";
 import { fmt } from "../units";
 
@@ -9,6 +10,7 @@ export default function Groups() {
   const [groups, setGroups] = useState([]);
   const [units, setUnits] = useState([]);
   const [form, setForm] = useState({ name: "", min_stock: "", min_stock_unit_id: "" });
+  const [selectedId, setSelectedId] = useState(null);
   const [error, setError] = useState(null);
 
   async function load() {
@@ -40,6 +42,7 @@ export default function Groups() {
   }
 
   async function patch(group, body) {
+    setError(null);
     try {
       await api.updateGroup(group.id, body);
       load();
@@ -52,18 +55,23 @@ export default function Groups() {
     if (!confirm(`Gruppe "${group.name}" löschen? Produkte bleiben erhalten, verlieren aber die Gruppenzuordnung.`)) return;
     try {
       await api.deleteGroup(group.id);
+      if (selectedId === group.id) setSelectedId(null);
       load();
     } catch (err) {
       setError(err.message);
     }
   }
 
+  const selected = groups.find((g) => g.id === selectedId) || null;
+
   return (
     <div>
       <div className="page-head">
         <div>
           <h1>Gruppen</h1>
-          <div className="sub">Produkte zusammenfassen (z.B. Nudeln) und einen Gruppen-Mindestbestand mit Einheit setzen</div>
+          <div className="sub">
+            Produkte zusammenfassen, Gruppen-Mindestbestand setzen und EAN-Codes hinterlegen
+          </div>
         </div>
       </div>
       {error && <div className="alert error"><Icon name="alert" size={16} />{error}</div>}
@@ -79,6 +87,7 @@ export default function Groups() {
                   <th className="num">Bestand</th>
                   <th>Mindestbestand</th>
                   <th>Einheit</th>
+                  <th className="num">EANs</th>
                   <th></th>
                 </tr>
               </thead>
@@ -87,8 +96,14 @@ export default function Groups() {
                   const low = g.min_stock != null && g.stock < g.min_stock;
                   return (
                     <tr key={g.id}>
-                      <td className="strong">
-                        {g.name}
+                      <td>
+                        {isAdmin ? (
+                          <input defaultValue={g.name} style={{ marginTop: 0, minWidth: 130 }}
+                            onBlur={(e) => {
+                              const v = e.target.value.trim();
+                              if (v && v !== g.name) patch(g, { name: v });
+                            }} />
+                        ) : <span className="strong">{g.name}</span>}
                         {low && <span className="badge warn" style={{ marginLeft: 6 }}>niedrig</span>}
                       </td>
                       <td className="num muted">{g.product_count}</td>
@@ -96,7 +111,7 @@ export default function Groups() {
                       <td>
                         {isAdmin ? (
                           <input type="number" step="any" defaultValue={g.min_stock ?? ""}
-                            style={{ maxWidth: 100, marginTop: 0 }}
+                            style={{ marginTop: 0, minWidth: 90 }}
                             onBlur={(e) => {
                               const v = e.target.value;
                               if (v !== String(g.min_stock ?? "")) {
@@ -107,7 +122,7 @@ export default function Groups() {
                       </td>
                       <td>
                         {isAdmin ? (
-                          <select value={g.min_stock_unit_id ?? ""} style={{ maxWidth: 140, marginTop: 0 }}
+                          <select value={g.min_stock_unit_id ?? ""} style={{ marginTop: 0 }}
                             onChange={(e) => patch(g, {
                               min_stock_unit_id: e.target.value === "" ? null : Number(e.target.value),
                             })}>
@@ -116,6 +131,11 @@ export default function Groups() {
                           </select>
                         ) : (g.min_stock_unit_name || "–")}
                       </td>
+                      <td className="num">
+                        <button className="link-btn" onClick={() => setSelectedId(g.id)}>
+                          {g.barcodes?.length || 0} verwalten
+                        </button>
+                      </td>
                       <td className="num">
                         {isAdmin && (
                           <button className="btn-icon danger" onClick={() => remove(g)} title="Löschen">
@@ -126,41 +146,71 @@ export default function Groups() {
                     </tr>
                   );
                 })}
-                {groups.length === 0 && <tr><td colSpan={6} className="empty">Noch keine Gruppen.</td></tr>}
+                {groups.length === 0 && <tr><td colSpan={7} className="empty">Noch keine Gruppen.</td></tr>}
               </tbody>
             </table>
           </div>
         </div>
 
-        {isAdmin && (
-          <form className="card" onSubmit={add}>
-            <div className="card-head"><Icon name="tag" /><h2>Neue Gruppe</h2></div>
-            <label>
-              Name
-              <input placeholder="z.B. Nudeln" value={form.name} onChange={(e) => setForm({ ...form, name: e.target.value })} required />
-            </label>
-            <div className="row">
-              <label className="grow">
-                Mindestbestand (optional)
-                <input type="number" step="any" value={form.min_stock}
-                  onChange={(e) => setForm({ ...form, min_stock: e.target.value })} placeholder="z.B. 2" />
+        <div>
+          {selected && (
+            <section className="card">
+              <div className="card-head">
+                <Icon name="search" />
+                <h2>EAN-Codes: {selected.name}</h2>
+              </div>
+              <BarcodeList
+                barcodes={selected.barcodes || []}
+                disabled={!isAdmin}
+                hint="Scannst du einen dieser Codes beim Einlagern, wird das neue Produkt automatisch dieser Gruppe zugeordnet."
+                onAdd={async (body) => {
+                  try {
+                    await api.addGroupBarcode(selected.id, body);
+                    await load();
+                  } catch (err) { setError(err.message); }
+                }}
+                onDelete={async (code) => {
+                  try {
+                    await api.deleteGroupBarcode(selected.id, code);
+                    await load();
+                  } catch (err) { setError(err.message); }
+                }}
+              />
+              <button className="btn ghost" onClick={() => setSelectedId(null)}>Schließen</button>
+            </section>
+          )}
+
+          {isAdmin && (
+            <form className="card" onSubmit={add}>
+              <div className="card-head"><Icon name="tag" /><h2>Neue Gruppe</h2></div>
+              <label>
+                Name
+                <input placeholder="z.B. Mehl" value={form.name}
+                  onChange={(e) => setForm({ ...form, name: e.target.value })} required />
               </label>
-              <label className="grow">
-                Einheit
-                <select value={form.min_stock_unit_id}
-                  onChange={(e) => setForm({ ...form, min_stock_unit_id: e.target.value })}>
-                  <option value="">– Basiseinheit –</option>
-                  {units.map((u) => <option key={u.id} value={u.id}>{u.name}</option>)}
-                </select>
-              </label>
-            </div>
-            <button className="btn primary"><Icon name="plus" size={16} />Anlegen</button>
-            <p className="muted small">
-              Der Gruppen-Bestand summiert nur Produkte, die zur gewählten Einheit passen
-              (Gewicht/Volumen/Stück). Produkte ordnest du im Produkt-Formular einer Gruppe zu.
-            </p>
-          </form>
-        )}
+              <div className="row">
+                <label className="grow">
+                  Mindestbestand (optional)
+                  <input type="number" step="any" value={form.min_stock}
+                    onChange={(e) => setForm({ ...form, min_stock: e.target.value })} placeholder="z.B. 2" />
+                </label>
+                <label className="grow">
+                  Einheit
+                  <select value={form.min_stock_unit_id}
+                    onChange={(e) => setForm({ ...form, min_stock_unit_id: e.target.value })}>
+                    <option value="">– Basiseinheit –</option>
+                    {units.map((u) => <option key={u.id} value={u.id}>{u.name}</option>)}
+                  </select>
+                </label>
+              </div>
+              <button className="btn primary"><Icon name="plus" size={16} />Anlegen</button>
+              <p className="muted small">
+                Der Gruppen-Bestand summiert nur Produkte, die zur gewählten Einheit passen.
+                Namen lassen sich in der Tabelle direkt ändern.
+              </p>
+            </form>
+          )}
+        </div>
       </div>
     </div>
   );

web/src/pages/ProductForm.jsx

@@ -2,6 +2,7 @@ import { useEffect, useState } from "react";
 import { useNavigate, useParams, useSearchParams } from "react-router-dom";
 import { api } from "../api";
 import { useAuth } from "../auth";
+import BarcodeList from "../components/BarcodeList";
 import Icon from "../components/Icon";
 import { guessGroup } from "../offUtils";
 import { daysUntil, expiryRowClass, fmt, isExpired, unitShort } from "../units";
@@ -332,6 +333,28 @@ export default function ProductForm() {
           {readOnly && <p className="muted small mt-0">Nur Administratoren können Produkte bearbeiten.</p>}
         </form>
 
+        {!isNew && product && (
+          <section className="card">
+            <div className="card-head"><Icon name="search" /><h2>Weitere EAN-Codes</h2></div>
+            <BarcodeList
+              barcodes={product.barcodes || []}
+              disabled={readOnly}
+              hint="Nützlich, wenn dasselbe Produkt mehrere Codes hat (z.B. Aktionspackung)."
+              onAdd={async (body) => {
+                try {
+                  setProduct(await api.addProductBarcode(id, body));
+                } catch (err) { setError(err.message); }
+              }}
+              onDelete={async (code) => {
+                try {
+                  await api.deleteProductBarcode(id, code);
+                  setProduct(await api.getProduct(id));
+                } catch (err) { setError(err.message); }
+              }}
+            />
+          </section>
+        )}
+
         {!isNew && (
           <LotsCard
             product={product}

web/src/pages/Users.jsx

@@ -76,7 +76,7 @@ export default function Users() {
                     </td>
                     <td>
                       <select value={u.role} onChange={(e) => changeRole(u, e.target.value)}
-                        disabled={u.id === me.id} style={{ maxWidth: 150 }}>
+                        disabled={u.id === me.id}>
                         <option value="user">Benutzer</option>
                         <option value="admin">Administrator</option>
                       </select>

web/src/styles.css

@@ -160,6 +160,8 @@ td .field-inline { margin-bottom: 0; flex-wrap: wrap; }
    Zahlenfelder duerfen wachsen, Einheiten-Dropdowns behalten ihre Textbreite. */
 .field-inline > input { flex: 1 1 auto; min-width: 78px; }
 .field-inline > select { flex: 0 0 auto; width: auto; min-width: 132px; }
+/* Auswahlfelder in Tabellen richten sich nach ihrem Text statt nach der Zelle. */
+td select { width: auto; min-width: 132px; max-width: 100%; }
 /* Button-Paare (z.B. Speichern/Abbrechen) gleich breit halten. */
 .btn-pair { display: flex; gap: var(--sp-2); flex-wrap: wrap; justify-content: flex-end; }
 .btn-pair .btn { flex: 1 1 auto; min-width: 104px; justify-content: center; }