Phase 7: Replace render_template() with s-expression rendering in all POST/PUT/DELETE routes

Eliminates all render_template() calls from POST/PUT/DELETE handlers across
all 7 services. Moves sexp_components.py into sexp/ packages per service.

- Blog: like toggle, snippets, cache clear, features/sumup/entry panels,
  create/delete market, WYSIWYG editor panel (render_editor_panel)
- Federation: like/unlike/boost/unboost, follow/unfollow, actor card,
  interaction buttons
- Events: ticket widget, checkin, confirm/decline/provisional, tickets
  config, posts CRUD, description edit/save, calendar/slot/ticket_type
  CRUD, payments, buy tickets, day main panel, entry page
- Market: like toggle, cart add response
- Account: newsletter toggle
- Cart: checkout error pages (3 handlers)
- Orders: checkout error page (1 handler)

Remaining render_template() calls are exclusively in GET handlers and
internal services (email templates, fragment endpoints).

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

market/bp/all_markets/routes.py

@@ -56,7 +56,7 @@ def register() -> Blueprint:
         )
 
         from shared.sexp.page import get_template_context
-        from sexp_components import render_all_markets_page, render_all_markets_oob
+        from sexp.sexp_components import render_all_markets_page, render_all_markets_oob
 
         tctx = await get_template_context()
         if is_htmx_request():
@@ -71,7 +71,7 @@ def register() -> Blueprint:
         page = int(request.args.get("page", 1))
         markets, has_more, page_info = await _load_markets(page)
 
-        from sexp_components import render_all_markets_cards
+        from sexp.sexp_components import render_all_markets_cards
         html = await render_all_markets_cards(markets, has_more, page_info, page)
         return await make_response(html, 200)
 

market/bp/browse/routes.py

@@ -43,7 +43,7 @@ def register():
 
       # Determine which template to use based on request type
       from shared.sexp.page import get_template_context
-      from sexp_components import render_market_home_page, render_market_home_oob
+      from sexp.sexp_components import render_market_home_page, render_market_home_oob
 
       ctx = await get_template_context()
       ctx.update(p_data)
@@ -74,7 +74,7 @@ def register():
       full_context = {**product_info, **ctx}
 
       from shared.sexp.page import get_template_context
-      from sexp_components import render_browse_page, render_browse_oob, render_browse_cards
+      from sexp.sexp_components import render_browse_page, render_browse_oob, render_browse_cards
 
       tctx = await get_template_context()
       tctx.update(full_context)
@@ -113,7 +113,7 @@ def register():
       full_context = {**product_info, **ctx}
 
       from shared.sexp.page import get_template_context
-      from sexp_components import render_browse_page, render_browse_oob, render_browse_cards
+      from sexp.sexp_components import render_browse_page, render_browse_oob, render_browse_cards
 
       tctx = await get_template_context()
       tctx.update(full_context)
@@ -152,7 +152,7 @@ def register():
       full_context = {**product_info, **ctx}
 
       from shared.sexp.page import get_template_context
-      from sexp_components import render_browse_page, render_browse_oob, render_browse_cards
+      from sexp.sexp_components import render_browse_page, render_browse_oob, render_browse_cards
 
       tctx = await get_template_context()
       tctx.update(full_context)

market/bp/market/admin/routes.py

@@ -18,7 +18,7 @@ def register():
         from shared.browser.app.utils.htmx import is_htmx_request
 
         from shared.sexp.page import get_template_context
-        from sexp_components import render_market_admin_page, render_market_admin_oob
+        from sexp.sexp_components import render_market_admin_page, render_market_admin_oob
 
         tctx = await get_template_context()
         if not is_htmx_request():

market/bp/page_markets/routes.py

@@ -40,7 +40,7 @@ def register() -> Blueprint:
         )
 
         from shared.sexp.page import get_template_context
-        from sexp_components import render_page_markets_page, render_page_markets_oob
+        from sexp.sexp_components import render_page_markets_page, render_page_markets_oob
 
         tctx = await get_template_context()
         tctx["post"] = post
@@ -58,7 +58,7 @@ def register() -> Blueprint:
 
         markets, has_more = await _load_markets(post["id"], page)
 
-        from sexp_components import render_page_markets_cards
+        from sexp.sexp_components import render_page_markets_cards
         post_slug = post.get("slug", "")
         html = await render_page_markets_cards(markets, has_more, page, post_slug)
         return await make_response(html, 200)

market/bp/product/routes.py

@@ -5,7 +5,6 @@ from quart import (
     Blueprint,
     abort,
     redirect,
-    render_template,
     make_response,
 )
 from sqlalchemy import select, func, update
@@ -108,7 +107,7 @@ def register():
         from shared.browser.app.utils.htmx import is_htmx_request
 
         from shared.sexp.page import get_template_context
-        from sexp_components import render_product_page, render_product_oob
+        from sexp.sexp_components import render_product_page, render_product_oob
 
         tctx = await get_template_context()
         item_data = getattr(g, "item_data", {})
@@ -126,12 +125,10 @@ def register():
     async def like_toggle():
       product_slug = g.product_slug
 
+      from sexp.sexp_components import render_like_toggle_button
+
       if not g.user:
-          html = await render_template(
-              "_types/browse/like/button.html",
-              slug=product_slug,
-              liked=False,
-          )
+          html = render_like_toggle_button(product_slug, False)
           resp = make_response(html, 403)
           return resp
 
@@ -142,12 +139,7 @@ def register():
       })
       liked = result["liked"]
 
-      html = await render_template(
-          "_types/browse/like/button.html",
-          slug=product_slug,
-          liked=liked,
-      )
-      return html
+      return render_like_toggle_button(product_slug, liked)
 
 
 
@@ -156,7 +148,7 @@ def register():
       from shared.browser.app.utils.htmx import is_htmx_request
 
       from shared.sexp.page import get_template_context
-      from sexp_components import render_product_admin_page, render_product_admin_oob
+      from sexp.sexp_components import render_product_admin_page, render_product_admin_oob
 
       tctx = await get_template_context()
       item_data = getattr(g, "item_data", {})
@@ -263,11 +255,10 @@ def register():
 
         # htmx response: OOB-swap mini cart + product buttons
         if request.headers.get("HX-Request") == "true":
-            return await render_template(
-                "_types/product/_added.html",
-                cart=g.cart,
-                item=ci_ns,
-            )
+            from sexp.sexp_components import render_cart_added_response
+            item_data = getattr(g, "item_data", {})
+            d = item_data.get("d", {})
+            return render_cart_added_response(g.cart, ci_ns, d)
 
         # normal POST: go to cart page
         from shared.infrastructure.urls import cart_url