Add recipe suggestions, chat tab, and major workflow improvements

- Replace 7-day grid menu with browsable recipe suggestion cards (swap, remove, make this)
- Add Chat tab: conversational AI with full pantry/menu/grocery context
- Grocery list works without a menu (pantry-only mode)
- Individual grocery checkboxes auto-add items to pantry
- Swap modal with optional preference input
- User notes textarea on menu and grocery generation
- Clear button for menu and grocery list
- LLM notes/summary displayed after generation, persisted to DB
- Favicon linked in HTML
- Category dropdown styled for dark theme
- System prompt configurable via SYSTEM_PROMPT in .env
- Fix startup error (ollama_timeout default), DB migration for menu_plans.notes
- Simplify: batch N+1 queries, extract _current_monday(), merge chat sync fns,
  asyncio.get_running_loop(), fix currentGroceryId bug, cap chat history

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

1 files changed, 1 insertions, 0 deletions

diff --git a/models.py b/models.py
index 7594409..9e78d65 100644
--- a/models.py
+++ b/models.py
@@ -61,6 +61,7 @@ class MenuPlan(Base):
     plan = Column(Text, nullable=False)
     generated_at = Column(DateTime, default=datetime.utcnow)
     model_used = Column(String, nullable=True)
+    notes = Column(Text, nullable=True)
 
 
 class GroceryList(Base):