Phase 6: Replace render_template() with s-expression rendering in all GET routes

Migrate ~52 GET route handlers across all 7 services from Jinja
render_template() to s-expression component rendering. Each service
gets a sexp_components.py with page/oob/cards render functions.

- Add per-service sexp_components.py (account, blog, cart, events,
  federation, market, orders) with full page, OOB, and pagination
  card rendering
- Add shared/sexp/helpers.py with call_url, root_header_html,
  full_page, oob_page utilities
- Update all GET routes to use get_template_context() + render fns
- Fix get_template_context() to inject Jinja globals (URL helpers)
- Add qs_filter to base_context for sexp filter URL building
- Mount sexp_components.py in docker-compose.dev.yml for all services
- Import sexp_components in app.py for Hypercorn --reload watching
- Fix route_prefix import (shared.utils not shared.infrastructure.urls)
- Fix federation choose-username missing actor in context
- Fix market page_markets missing post in context

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

blog/bp/post/admin/routes.py

@@ -51,13 +51,15 @@ def register():
         "sumup_checkout_prefix": sumup_checkout_prefix,
     }
 
-    # Determine which template to use based on request type
+    from shared.sexp.page import get_template_context
+    from sexp_components import render_post_admin_page, render_post_admin_oob
+
+    tctx = await get_template_context()
+    tctx.update(ctx)
     if not is_htmx_request():
-        # Normal browser request: full page with layout
-        html = await render_template("_types/post/admin/index.html", **ctx)
+        html = await render_post_admin_page(tctx)
     else:
-        # HTMX request: main panel + OOB elements
-        html = await render_template("_types/post/admin/_oob_elements.html", **ctx)
+        html = await render_post_admin_oob(tctx)
 
     return await make_response(html)
 
@@ -149,14 +151,16 @@ def register():
   @bp.get("/data/")
   @require_admin
   async def data(slug: str):
+    from shared.sexp.page import get_template_context
+    from sexp_components import render_post_data_page, render_post_data_oob
+
+    data_html = await render_template("_types/post_data/_main_panel.html")
+    tctx = await get_template_context()
+    tctx["data_html"] = data_html
     if not is_htmx_request():
-      html = await render_template(
-          "_types/post_data/index.html",
-      )
+      html = await render_post_data_page(tctx)
     else:
-      html = await render_template(
-          "_types/post_data/_oob_elements.html",
-      )
+      html = await render_post_data_oob(tctx)
 
     return await make_response(html)
 
@@ -266,18 +270,20 @@ def register():
     # Load entries and post for each calendar
     for calendar in all_calendars:
       await g.s.refresh(calendar, ["entries", "post"])
+    from shared.sexp.page import get_template_context
+    from sexp_components import render_post_entries_page, render_post_entries_oob
+
+    entries_html = await render_template(
+        "_types/post_entries/_main_panel.html",
+        all_calendars=all_calendars,
+        associated_entry_ids=associated_entry_ids,
+    )
+    tctx = await get_template_context()
+    tctx["entries_html"] = entries_html
     if not is_htmx_request():
-      html = await render_template(
-          "_types/post_entries/index.html",
-          all_calendars=all_calendars,
-          associated_entry_ids=associated_entry_ids,
-      )
+      html = await render_post_entries_page(tctx)
     else:
-      html = await render_template(
-          "_types/post_entries/_oob_elements.html",
-          all_calendars=all_calendars,
-          associated_entry_ids=associated_entry_ids,
-      )
+      html = await render_post_entries_oob(tctx)
 
     return await make_response(html)
 
@@ -350,18 +356,20 @@ def register():
     ghost_post = await get_post_for_edit(ghost_id, is_page=is_page)
     save_success = request.args.get("saved") == "1"
 
+    from shared.sexp.page import get_template_context
+    from sexp_components import render_post_settings_page, render_post_settings_oob
+
+    settings_html = await render_template(
+        "_types/post_settings/_main_panel.html",
+        ghost_post=ghost_post,
+        save_success=save_success,
+    )
+    tctx = await get_template_context()
+    tctx["settings_html"] = settings_html
     if not is_htmx_request():
-      html = await render_template(
-          "_types/post_settings/index.html",
-          ghost_post=ghost_post,
-          save_success=save_success,
-      )
+      html = await render_post_settings_page(tctx)
     else:
-      html = await render_template(
-          "_types/post_settings/_oob_elements.html",
-          ghost_post=ghost_post,
-          save_success=save_success,
-      )
+      html = await render_post_settings_oob(tctx)
 
     return await make_response(html)
 
@@ -451,20 +459,21 @@ def register():
     from types import SimpleNamespace
     newsletters = [SimpleNamespace(**nl) for nl in raw_newsletters]
 
+    from shared.sexp.page import get_template_context
+    from sexp_components import render_post_edit_page, render_post_edit_oob
+
+    edit_html = await render_template(
+        "_types/post_edit/_main_panel.html",
+        ghost_post=ghost_post,
+        save_success=save_success,
+        newsletters=newsletters,
+    )
+    tctx = await get_template_context()
+    tctx["edit_html"] = edit_html
     if not is_htmx_request():
-      html = await render_template(
-          "_types/post_edit/index.html",
-          ghost_post=ghost_post,
-          save_success=save_success,
-          newsletters=newsletters,
-      )
+      html = await render_post_edit_page(tctx)
     else:
-      html = await render_template(
-          "_types/post_edit/_oob_elements.html",
-          ghost_post=ghost_post,
-          save_success=save_success,
-          newsletters=newsletters,
-      )
+      html = await render_post_edit_oob(tctx)
 
     return await make_response(html)