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>

market/bp/browse/routes.py

@@ -42,12 +42,15 @@ def register():
       p_data = getattr(g, "post_data", None) or {}
 
       # 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
+
+      ctx = await get_template_context()
+      ctx.update(p_data)
       if not is_htmx_request():
-          # Normal browser request: full page with layout
-          html = await render_template("_types/market/index.html", **p_data)
+          html = await render_market_home_page(ctx)
       else:
-          # HTMX request: main panel + OOB elements
-          html = await render_template("_types/market/_oob_elements.html", **p_data)
+          html = await render_market_home_oob(ctx)
 
       return await make_response(html)
 
@@ -70,16 +73,18 @@ def register():
       product_info = await _productInfo()
       full_context = {**product_info, **ctx}
 
-      # Determine which template to use based on request type and pagination
+      from shared.sexp.page import get_template_context
+      from sexp_components import render_browse_page, render_browse_oob, render_browse_cards
+
+      tctx = await get_template_context()
+      tctx.update(full_context)
       if not is_htmx_request():
-          # Normal browser request: full page with layout
-          html = await render_template("_types/browse/index.html", **full_context)
+          html = await render_browse_page(tctx)
       elif product_info["page"] > 1:
-          # HTMX pagination: just product cards + sentinel
-          html = await render_template("_types/browse/_product_cards.html", **product_info)
+          tctx.update(product_info)
+          html = await render_browse_cards(tctx)
       else:
-          # HTMX navigation (page 1): main panel + OOB elements
-          html = await render_template("_types/browse/_oob_elements.html", **full_context)
+          html = await render_browse_oob(tctx)
 
       resp = await make_response(html)
       resp.headers["Hx-Push-Url"] = _current_url_without_page()
@@ -107,15 +112,18 @@ def register():
       product_info = await _productInfo(top_slug)
       full_context = {**product_info, **ctx}
 
-      # Determine which template to use based on request type and pagination
+      from shared.sexp.page import get_template_context
+      from sexp_components import render_browse_page, render_browse_oob, render_browse_cards
+
+      tctx = await get_template_context()
+      tctx.update(full_context)
       if not is_htmx_request():
-          # Normal browser request: full page with layout
-          html = await render_template("_types/browse/index.html", **full_context)
+          html = await render_browse_page(tctx)
       elif product_info["page"] > 1:
-          # HTMX pagination: just product cards + sentinel
-          html = await render_template("_types/browse/_product_cards.html", **product_info)
+          tctx.update(product_info)
+          html = await render_browse_cards(tctx)
       else:
-          html = await render_template("_types/browse/_oob_elements.html", **full_context)
+          html = await render_browse_oob(tctx)
 
       resp = await make_response(html)
       resp.headers["Hx-Push-Url"] = _current_url_without_page()
@@ -143,16 +151,18 @@ def register():
       product_info = await _productInfo(top_slug, sub_slug)
       full_context = {**product_info, **ctx}
 
-      # Determine which template to use based on request type and pagination
+      from shared.sexp.page import get_template_context
+      from sexp_components import render_browse_page, render_browse_oob, render_browse_cards
+
+      tctx = await get_template_context()
+      tctx.update(full_context)
       if not is_htmx_request():
-          # Normal browser request: full page with layout
-          html = await render_template("_types/browse/index.html", **full_context)
+          html = await render_browse_page(tctx)
       elif product_info["page"] > 1:
-          # HTMX pagination: just product cards + sentinel
-          html = await render_template("_types/browse/_product_cards.html", **product_info)
+          tctx.update(product_info)
+          html = await render_browse_cards(tctx)
       else:
-          # HTMX navigation (page 1): main panel + OOB elements
-          html = await render_template("_types/browse/_oob_elements.html", **full_context)
+          html = await render_browse_oob(tctx)
 
       resp = await make_response(html)
       resp.headers["Hx-Push-Url"] = _current_url_without_page()