feat: restructure market app with per-market URL scoping

- URL structure changes from /<route> to /<market_slug>/<route>
- Root / shows markets listing page
- app.py: url_value_preprocessor, url_defaults, hydrate_market (events app pattern)
- Browse queries (db_nav, db_products_nocounts, db_products_counts) accept market_id
- _productInfo reads g.market.id to scope all queries
- save_nav accepts market_id, sets on new NavTop rows
- API save_nav passes g.market.id
- Scraper default URLs point to /suma-market/ on port 8001

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

bp/browse/services/services.py

@@ -26,12 +26,16 @@ async def _productInfo(top_slug=None, sub_slug=None):
     Shared query logic for home / category / subcategory pages.
     Pulls filters from qs.decode(), queries products(), and orders brands/stickers/etc.
     """
-    
+
     q = decode()
     page, search, sort = q.page, q.search, q.sort
     selected_brands, selected_stickers, selected_labels = q.selected_brands, q.selected_stickers, q.selected_labels
     liked = q.liked
 
+    # Get market_id from hydrated market context
+    market = getattr(g, "market", None)
+    market_id = market.id if market else None
+
     if top_slug is not None and sub_slug is not None:
         list_url = urljoin(config()["base_url"], f"/{top_slug}/{sub_slug}")
     else:
@@ -50,6 +54,7 @@ async def _productInfo(top_slug=None, sub_slug=None):
           sort=sort,
           user_id=g.user.id if g.user else None,
           liked = liked,
+          market_id=market_id,
       )
 
       brands_ordered = _order_brands_selected_first(brands, selected_brands)
@@ -82,6 +87,7 @@ async def _productInfo(top_slug=None, sub_slug=None):
             sort=sort,
             user_id=g.user.id if g.user else None,
             liked = liked,
+            market_id=market_id,
         )
         return {
             "products": items,