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/routes.py

@@ -37,14 +37,9 @@ def register():
   async def home():
       """
       Market landing page.
-      Shows the Ghost CMS post with slug='market'.
+      Uses the post data hydrated by the app-level before_request (g.post_data).
       """
-      from shared.internal_api import get as api_get
-
-      # Fetch the market post from coop internal API
-      p_data = await api_get("coop", "/internal/post/market")
-      if not p_data:
-          abort(404)
+      p_data = getattr(g, "post_data", None) or {}
 
       # Determine which template to use based on request type
       if not is_htmx_request():
@@ -63,7 +58,9 @@ def register():
       Browse all products across all categories.
       Renders full page or just product cards (HTMX pagination fragment).
       """
-      nav = await get_nav(g.s)
+      market = getattr(g, "market", None)
+      market_id = market.id if market else None
+      nav = await get_nav(g.s, market_id=market_id)
       ctx = {
           "category_label": "All Products",
           "top_slug": "all",
@@ -102,7 +99,9 @@ def register():
       if is_category_blocked(top_slug):
           abort(404)
 
-      nav = await get_nav(g.s)
+      market = getattr(g, "market", None)
+      market_id = market.id if market else None
+      nav = await get_nav(g.s, market_id=market_id)
       ctx = category_context(top_slug, None, nav)
 
       product_info = await _productInfo(top_slug)
@@ -136,7 +135,9 @@ def register():
       if is_category_blocked(top_slug, sub_slug):
           abort(404)
 
-      nav = await get_nav(g.s)
+      market = getattr(g, "market", None)
+      market_id = market.id if market else None
+      nav = await get_nav(g.s, market_id=market_id)
       ctx = category_context(top_slug, sub_slug, nav)
 
       product_info = await _productInfo(top_slug, sub_slug)