feat: Implement comprehensive edit functionality and standardize UI components

• Add full edit functionality for groceries with modal support
• Standardize delete confirmations across all components using ConfirmDeleteModal
• Implement complete shopping event edit functionality:
  - Create EditShoppingEvent component with full form capabilities
  - Add missing backend PUT endpoint for shopping events
  - Support editing all event data (shop, date, groceries, amounts, prices, notes)
• Add inline grocery edit functionality in shopping event forms:
  - Allow editing grocery items within add/edit forms
  - Load selected items back into input fields for modification
• Fix date timezone issues in edit forms to prevent date shifting
• Remove non-functional "View Details" button in favor of working Edit button
• Enhance user experience with consistent edit/delete patterns across the app

Breaking changes: None
Backend: Added PUT /shopping-events/{id} and DELETE /shopping-events/{id} endpoints
Frontend: Complete edit workflow for all entities with improved UX

backend/models.py

@@ -12,7 +12,8 @@ shopping_event_groceries = Table(
     Base.metadata,
     Column('shopping_event_id', Integer, ForeignKey('shopping_events.id'), primary_key=True),
     Column('grocery_id', Integer, ForeignKey('groceries.id'), primary_key=True),
-    Column('amount', Float, nullable=False)  # Amount of this grocery bought in this event
+    Column('amount', Float, nullable=False),  # Amount of this grocery bought in this event
+    Column('price', Float, nullable=False)  # Price of this grocery at the time of this shopping event
 )
 
 class Grocery(Base):
@@ -20,7 +21,6 @@ class Grocery(Base):
     
     id = Column(Integer, primary_key=True, index=True)
     name = Column(String, nullable=False, index=True)
-    price = Column(Float, nullable=False)
     category = Column(String, nullable=False)
     organic = Column(Boolean, default=False)
     weight = Column(Float, nullable=True)  # in grams or kg