Add per-user meal plans and household sharing

Each user now has their own meal plan and shopping list. Users can
form a household (invite by username, owner can remove members) so
that shopping list generation combines all household members' plans.
DB migration preserves existing data assigned to user id=1.

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

1 files changed, 10 insertions, 1 deletions

diff --git a/app/templates/shopping_list.html b/app/templates/shopping_list.html
index e6cfaaf..8a3a60e 100644
--- a/app/templates/shopping_list.html
+++ b/app/templates/shopping_list.html
@@ -9,6 +9,9 @@
       Week of {{ week_start.strftime('%B %d, %Y') }}
       {% if total %} ·  {{ checked }}/{{ total }} checked{% endif %}
     </p>
+    {% if member_count and member_count > 1 %}
+    <p class="text-muted small mb-0"><i class="bi bi-people me-1"></i>Combined from {{ member_count }} household members' plans</p>
+    {% endif %}
   </div>
   <div class="d-flex gap-2 align-items-center">
     <a href="/shopping-list?week={{ prev_week }}" class="btn btn-outline-secondary btn-sm"><i class="bi bi-chevron-left"></i></a>
@@ -145,7 +148,13 @@ async function regenerate() {
   if (!res) return;
   const data = await res.json();
   if (data.success) {
-    location.reload();
+    if (data.member_count > 1) {
+      document.getElementById('toastBody').textContent = `Combined from ${data.member_count} members' plans!`;
+      toast.show();
+      setTimeout(() => location.reload(), 1500);
+    } else {
+      location.reload();
+    }
   } else {
     document.getElementById('toastBody').textContent = data.error || 'No meals planned for this week.';
     document.getElementById('toast').className = 'toast align-items-center text-bg-danger border-0';