feat(dashboard): add shopping list widget

Show shopping lists with open items directly on the dashboard.
Each list displays a progress bar, the first few unchecked items,
and a "+N more" overflow indicator. Widget only appears when there
are lists with open items.

Backend: new shoppingLists query in /api/v1/dashboard (up to 3 lists,
6 open items each). Frontend: renderShoppingLists() widget following
existing widget pattern. CSS: compact list/progress/item styles.
i18n: shoppingMore key added to de/en/it.

Requested in discussion #9

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.8.0] - 2026-04-04
+
+### Added
+- Shopping list widget on dashboard - shows lists with open items, progress bar, and item preview (discussion #9)
+
 ## [0.7.7] - 2026-04-04
 
 ### Fixed

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oikos",
-  "version": "0.7.7",
+  "version": "0.8.0",
   "description": "Self-hosted family planner - calendar, tasks, shopping, meal planning, budget and more. Private, open-source, no subscription.",
   "main": "server/index.js",
   "type": "module",

public/locales/de.json

@@ -75,7 +75,8 @@
     "overdue": "Überfällig",
     "dueSoon": "Heute fällig",
     "dueTomorrow": "Morgen fällig",
-    "allDay": "Ganztägig"
+    "allDay": "Ganztägig",
+    "shoppingMore": "+{{count}} weitere"
   },
 
   "tasks": {

public/locales/en.json

@@ -75,7 +75,8 @@
     "overdue": "Overdue",
     "dueSoon": "Due today",
     "dueTomorrow": "Due tomorrow",
-    "allDay": "All day"
+    "allDay": "All day",
+    "shoppingMore": "+{{count}} more"
   },
 
   "tasks": {

public/locales/it.json

@@ -75,7 +75,8 @@
     "overdue": "Scaduto",
     "dueSoon": "Scade oggi",
     "dueTomorrow": "Scade domani",
-    "allDay": "Tutto il giorno"
+    "allDay": "Tutto il giorno",
+    "shoppingMore": "+{{count}} altri"
   },
 
   "tasks": {

public/pages/dashboard.js

@@ -270,6 +270,53 @@ function renderPinnedNotes(notes) {
   </div>`;
 }
 
+// --------------------------------------------------------
+// Shopping-Widget
+// --------------------------------------------------------
+
+function renderShoppingLists(lists) {
+  if (!lists.length) return '';
+
+  const totalOpen = lists.reduce((sum, l) => sum + l.open_count, 0);
+
+  const listsHtml = lists.map((list) => {
+    const progress = list.total_count > 0
+      ? Math.round(((list.total_count - list.open_count) / list.total_count) * 100)
+      : 0;
+
+    const itemsHtml = list.items.map((item) => `
+      <div class="shopping-widget-item">
+        <span class="shopping-widget-item__dot"></span>
+        <span class="shopping-widget-item__name">${esc(item.name)}</span>
+        ${item.quantity ? `<span class="shopping-widget-item__qty">${esc(item.quantity)}</span>` : ''}
+      </div>
+    `).join('');
+
+    const moreCount = list.open_count - list.items.length;
+
+    return `
+      <div class="shopping-widget-list" data-route="/shopping" role="button" tabindex="0">
+        <div class="shopping-widget-list__header">
+          <span class="shopping-widget-list__name">${esc(list.name)}</span>
+          <span class="shopping-widget-list__count">${list.total_count - list.open_count}/${list.total_count}</span>
+        </div>
+        <div class="shopping-widget-list__progress">
+          <div class="shopping-widget-list__bar" style="width:${progress}%"></div>
+        </div>
+        <div class="shopping-widget-list__items">
+          ${itemsHtml}
+          ${moreCount > 0 ? `<div class="shopping-widget-item shopping-widget-item--more">${t('dashboard.shoppingMore', { count: moreCount })}</div>` : ''}
+        </div>
+      </div>
+    `;
+  }).join('');
+
+  return `<div class="widget">
+    ${widgetHeader('shopping-cart', t('nav.shopping'), totalOpen, '/shopping')}
+    <div class="widget__body">${listsHtml}</div>
+  </div>`;
+}
+
 // --------------------------------------------------------
 // Wetter-Widget
 // --------------------------------------------------------
@@ -431,7 +478,7 @@ export async function render(container, { user }) {
     ${renderFab()}
   `;
 
-  let data    = { upcomingEvents: [], urgentTasks: [], todayMeals: [], pinnedNotes: [] };
+  let data    = { upcomingEvents: [], urgentTasks: [], todayMeals: [], pinnedNotes: [], shoppingLists: [] };
   let weather = null;
   try {
     const [dashRes, weatherRes] = await Promise.all([
@@ -464,6 +511,7 @@ export async function render(container, { user }) {
         ${renderWeatherWidget(weather)}
         ${renderUrgentTasks(data.urgentTasks ?? [])}
         ${renderUpcomingEvents(data.upcomingEvents ?? [])}
+        ${renderShoppingLists(data.shoppingLists ?? [])}
         ${renderTodayMeals(data.todayMeals ?? [])}
         ${renderPinnedNotes(data.pinnedNotes ?? [])}
       </div>

public/styles/dashboard.css

@@ -486,6 +486,102 @@
   }
 }
 
+/* --------------------------------------------------------
+ * Shopping-Widget
+ * -------------------------------------------------------- */
+.shopping-widget-list {
+  cursor: pointer;
+  transition: background-color var(--transition-fast);
+  border-radius: var(--radius-sm);
+  padding: var(--space-2) 0;
+}
+
+.shopping-widget-list:hover {
+  background-color: var(--color-surface-2);
+}
+
+.shopping-widget-list + .shopping-widget-list {
+  border-top: 1px solid var(--color-border-subtle);
+  margin-top: var(--space-2);
+  padding-top: var(--space-3);
+}
+
+.shopping-widget-list__header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: var(--space-1);
+}
+
+.shopping-widget-list__name {
+  font-size: var(--text-sm);
+  font-weight: var(--font-weight-semibold);
+  color: var(--color-text-primary);
+}
+
+.shopping-widget-list__count {
+  font-size: var(--text-xs);
+  color: var(--color-text-tertiary);
+  font-weight: var(--font-weight-medium);
+}
+
+.shopping-widget-list__progress {
+  height: 4px;
+  background-color: var(--color-surface-3);
+  border-radius: var(--radius-full);
+  overflow: hidden;
+  margin-bottom: var(--space-2);
+}
+
+.shopping-widget-list__bar {
+  height: 100%;
+  background-color: var(--color-success);
+  border-radius: var(--radius-full);
+  transition: width 0.3s ease;
+}
+
+.shopping-widget-list__items {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-1);
+}
+
+.shopping-widget-item {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+  font-size: var(--text-xs);
+  color: var(--color-text-secondary);
+  line-height: 1.4;
+}
+
+.shopping-widget-item__dot {
+  width: 5px;
+  height: 5px;
+  border-radius: var(--radius-full);
+  background-color: var(--color-text-disabled);
+  flex-shrink: 0;
+}
+
+.shopping-widget-item__name {
+  flex: 1;
+  min-width: 0;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.shopping-widget-item__qty {
+  color: var(--color-text-tertiary);
+  font-size: var(--text-xs);
+  flex-shrink: 0;
+}
+
+.shopping-widget-item--more {
+  color: var(--color-text-tertiary);
+  font-style: italic;
+}
+
 /* --------------------------------------------------------
  * Notizen-Grid-Widget
  * -------------------------------------------------------- */

server/routes/dashboard.js

@@ -112,6 +112,33 @@ router.get('/', (req, res) => {
     result.pinnedNotes = [];
   }
 
+  // Einkaufslisten mit offenen Artikeln (max. 3 Listen, je bis zu 6 offene Items)
+  try {
+    const lists = d.prepare(`
+      SELECT sl.id, sl.name,
+        (SELECT COUNT(*) FROM shopping_items si WHERE si.list_id = sl.id AND si.is_checked = 0) AS open_count,
+        (SELECT COUNT(*) FROM shopping_items si WHERE si.list_id = sl.id) AS total_count
+      FROM shopping_lists sl
+      HAVING open_count > 0
+      ORDER BY sl.updated_at DESC
+      LIMIT 3
+    `).all();
+
+    for (const list of lists) {
+      list.items = d.prepare(`
+        SELECT id, name, quantity, is_checked
+        FROM shopping_items
+        WHERE list_id = ? AND is_checked = 0
+        ORDER BY id ASC
+        LIMIT 6
+      `).all(list.id);
+    }
+    result.shoppingLists = lists;
+  } catch (err) {
+    log.error('shoppingLists-Fehler:', err.message);
+    result.shoppingLists = [];
+  }
+
   // Alle User (für Avatar-Farben in Widgets)
   try {
     result.users = d.prepare(