Consolidate post header/menu system into shared infrastructure

Replace duplicated _post_header_html, _oob_header_html, and header-child
components across blog/events/market/errors with shared sexpr components
(~post-label, ~page-cart-badge, ~oob-header, ~header-child, ~error-content)
and shared Python helpers (post_header_html, oob_header_html,
header_child_html, error_content_html). App-specific logic (blog container-nav
wrapping, admin cog, events calendar links) preserved via thin wrappers.

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

events/sexp/header.sexpr

@@ -1,20 +1,5 @@
 ;; Events header components
 
-(defcomp ~events-oob-header (&key parent-id child-id row-html)
-  (div :id parent-id :hx-swap-oob "outerHTML" :class "w-full"
-    (div :class "w-full"
-      (raw! row-html)
-      (div :id child-id))))
-
-(defcomp ~events-post-label (&key feature-image title)
-  (<> (when feature-image (img :src feature-image :class "h-8 w-8 rounded-full object-cover border border-stone-300 flex-shrink-0"))
-      (span title)))
-
-(defcomp ~events-post-cart-link (&key href count)
-  (a :href href :class "relative inline-flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-full border border-emerald-300 bg-emerald-50 text-emerald-800 hover:bg-emerald-100 transition"
-    (i :class "fa fa-shopping-cart" :aria-hidden "true")
-    (span count)))
-
 (defcomp ~events-calendars-label ()
   (<> (i :class "fa fa-calendar" :aria-hidden "true") (div "Calendars")))
 
@@ -39,5 +24,3 @@
   (div :id (str "entry-title-" entry-id) :class "flex gap-1 items-center"
     (raw! title-html) (raw! times-html)))
 
-(defcomp ~events-header-child (&key inner-html)
-  (div :id "root-header-child" :class "w-full" (raw! inner-html)))

events/sexp/sexp_components.py

@@ -14,6 +14,8 @@ from markupsafe import escape
 from shared.sexp.jinja_bridge import render, load_service_components
 from shared.sexp.helpers import (
     call_url, get_asset_url, root_header_html,
+    post_header_html as _shared_post_header_html,
+    oob_header_html,
     search_mobile_html, search_desktop_html,
     full_page, oob_page,
 )
@@ -23,46 +25,21 @@ load_service_components(os.path.dirname(os.path.dirname(__file__)))
 
 
 # ---------------------------------------------------------------------------
-# OOB header helper (same pattern as market)
+# OOB header helper — delegates to shared
 # ---------------------------------------------------------------------------
 
-def _oob_header_html(parent_id: str, child_id: str, row_html: str) -> str:
-    """Wrap a header row in OOB div with child placeholder."""
-    return render("events-oob-header",
-                  parent_id=parent_id, child_id=child_id, row_html=row_html)
+_oob_header_html = oob_header_html
 
 
 # ---------------------------------------------------------------------------
-# Post header helpers (mirrors events/templates/_types/post/header/_header.html)
+# Post header helpers — thin wrapper over shared post_header_html
 # ---------------------------------------------------------------------------
 
 def _post_header_html(ctx: dict, *, oob: bool = False) -> str:
-    """Build the post-level header row."""
-    post = ctx.get("post") or {}
-    slug = post.get("slug", "")
-    title = (post.get("title") or "")[:160]
-    feature_image = post.get("feature_image")
-
-    label_html = render("events-post-label",
-                        feature_image=feature_image, title=title)
-
-    nav_parts = []
-    page_cart_count = ctx.get("page_cart_count", 0)
-    if page_cart_count and page_cart_count > 0:
-        cart_href = call_url(ctx, "cart_url", f"/{slug}/")
-        nav_parts.append(render("events-post-cart-link",
-                                href=cart_href, count=str(page_cart_count)))
-
-    # Post nav: calendar links + admin
-    nav_parts.append(_post_nav_html(ctx))
-
-    nav_html = "".join(nav_parts)
-    link_href = call_url(ctx, "blog_url", f"/{slug}/")
-
-    return render("menu-row", id="post-row", level=1,
-                  link_href=link_href, link_label_html=label_html,
-                  nav_html=nav_html, child_id="post-header-child", oob=oob,
-                  external=True)
+    """Build the post-level header row (events-specific: calendar links + admin cog)."""
+    admin_nav = _post_nav_html(ctx)
+    effective_ctx = {**ctx, "post_admin_nav_html": admin_nav} if admin_nav else ctx
+    return _shared_post_header_html(effective_ctx, oob=oob)
 
 
 def _post_nav_html(ctx: dict) -> str:
@@ -1235,7 +1212,7 @@ async def render_page_summary_page(ctx: dict, entries, has_more, pending_tickets
     )
 
     hdr = root_header_html(ctx)
-    hdr += render("events-header-child",
+    hdr += render("header-child",
                   inner_html=_post_header_html(ctx))
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
@@ -1289,7 +1266,7 @@ async def render_calendars_page(ctx: dict) -> str:
     content = _calendars_main_panel_html(ctx)
     hdr = root_header_html(ctx)
     child = _post_header_html(ctx) + _calendars_header_html(ctx)
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -1311,7 +1288,7 @@ async def render_calendar_page(ctx: dict) -> str:
     content = _calendar_main_panel_html(ctx)
     hdr = root_header_html(ctx)
     child = _post_header_html(ctx) + _calendar_header_html(ctx)
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -1334,7 +1311,7 @@ async def render_day_page(ctx: dict) -> str:
     hdr = root_header_html(ctx)
     child = (_post_header_html(ctx)
              + _calendar_header_html(ctx) + _day_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -1358,7 +1335,7 @@ async def render_day_admin_page(ctx: dict) -> str:
     child = (_post_header_html(ctx)
              + _calendar_header_html(ctx) + _day_header_html(ctx)
              + _day_admin_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -1381,7 +1358,7 @@ async def render_calendar_admin_page(ctx: dict) -> str:
     hdr = root_header_html(ctx)
     child = (_post_header_html(ctx)
              + _calendar_header_html(ctx) + _calendar_admin_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -1407,7 +1384,7 @@ async def render_slots_page(ctx: dict) -> str:
     hdr = root_header_html(ctx)
     child = (_post_header_html(ctx)
              + _calendar_header_html(ctx) + _calendar_admin_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -1476,7 +1453,7 @@ async def render_markets_page(ctx: dict) -> str:
     content = _markets_main_panel_html(ctx)
     hdr = root_header_html(ctx)
     child = _post_header_html(ctx) + _markets_header_html(ctx)
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -1860,7 +1837,7 @@ async def render_entry_page(ctx: dict) -> str:
     child = (_post_header_html(ctx)
              + _calendar_header_html(ctx) + _day_header_html(ctx)
              + _entry_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     nav_html = _entry_nav_html(ctx)
     return full_page(ctx, header_rows_html=hdr, content_html=content, menu_html=nav_html)
 
@@ -2873,7 +2850,7 @@ async def render_entry_admin_page(ctx: dict) -> str:
     child = (_post_header_html(ctx)
              + _calendar_header_html(ctx) + _day_header_html(ctx)
              + _entry_header_html(ctx) + _entry_admin_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     nav_html = render("events-admin-placeholder-nav")
     return full_page(ctx, header_rows_html=hdr, content_html=content, menu_html=nav_html)
 
@@ -2932,7 +2909,7 @@ async def render_slot_page(ctx: dict) -> str:
     child = (_post_header_html(ctx)
              + _calendar_header_html(ctx) + _calendar_admin_header_html(ctx)
              + _slot_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     return full_page(ctx, header_rows_html=hdr, content_html=content)
 
 
@@ -3140,7 +3117,7 @@ async def render_ticket_types_page(ctx: dict) -> str:
              + _calendar_header_html(ctx) + _day_header_html(ctx)
              + _entry_header_html(ctx) + _entry_admin_header_html(ctx)
              + _ticket_types_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     nav_html = render("events-admin-placeholder-nav")
     return full_page(ctx, header_rows_html=hdr, content_html=content, menu_html=nav_html)
 
@@ -3214,7 +3191,7 @@ async def render_ticket_type_page(ctx: dict) -> str:
              + _calendar_header_html(ctx) + _day_header_html(ctx)
              + _entry_header_html(ctx) + _entry_admin_header_html(ctx)
              + _ticket_types_header_html(ctx) + _ticket_type_header_html(ctx))
-    hdr += render("events-header-child", inner_html=child)
+    hdr += render("header-child", inner_html=child)
     nav_html = render("events-admin-placeholder-nav")
     return full_page(ctx, header_rows_html=hdr, content_html=content, menu_html=nav_html)