feat: decouple market from shared_lib, add app-owned models

Phase 1-3 of decoupling:
- path_setup.py adds project root to sys.path
- Market-owned models in market/models/ (market, market_place)
- All imports updated: shared.infrastructure, shared.db, shared.browser, etc.
- MarketPlace uses container_type/container_id instead of post_id FK

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

bp/product/routes.py

@@ -15,8 +15,8 @@ from ..browse.services.slugs import canonical_html_slug
 from ..browse.services.blacklist.product import is_product_blocked
 from ..browse.services import db_backend as cb
 from ..browse.services import _massage_product
-from utils import host_url
-from suma_browser.app.redis_cacher import cache_page, clear_cache
+from shared.utils import host_url
+from shared.browser.app.redis_cacher import cache_page, clear_cache
 from ..cart.services import total
 from .services.product_operations import toggle_product_like, massage_full_product
 
@@ -94,7 +94,7 @@ def register():
     @bp.get("/")
     @cache_page(tag="browse")
     async def product_detail(slug: str):
-        from suma_browser.app.utils.htmx import is_htmx_request
+        from shared.browser.app.utils.htmx import is_htmx_request
 
         # Determine which template to use based on request type
         if not is_htmx_request():
@@ -136,11 +136,11 @@ def register():
       )
       return html
 
-    
-    
+
+
     @bp.get("/admin/")
     async def admin(slug: str):
-      from suma_browser.app.utils.htmx import is_htmx_request
+      from shared.browser.app.utils.htmx import is_htmx_request
 
       if not is_htmx_request():
         # Normal browser request: full page with layout
@@ -152,8 +152,8 @@ def register():
       return await make_response(html)
     
     
-    from suma_browser.app.bp.cart.services.identity import current_cart_identity
-    #from suma_browser.app.bp.cart.routes import view_cart
+    from bp.cart.services.identity import current_cart_identity
+    #from bp.cart.routes import view_cart
     from models.market import CartItem
     from quart import request, url_for
 
@@ -242,7 +242,7 @@ def register():
             )
 
         # normal POST: go to cart page
-        from shared.urls import cart_url
+        from shared.infrastructure.urls import cart_url
         return redirect(cart_url("/"))
 
     

bp/product/services/product_operations.py

@@ -13,7 +13,7 @@ def massage_full_product(product: Product) -> dict:
     Convert a Product ORM model to a dictionary with all fields.
     Used for rendering product detail pages.
     """
-    from suma_browser.app.bp.browse.services import _massage_product
+    from bp.browse.services import _massage_product
 
     gallery = []
     if product.image: