Externalize sexp to .sexpr files + render() API

Replace all 676 inline sexp() string calls across 7 services with
render(component_name, **kwargs) calls backed by 46 external .sexpr
component definition files (587 defcomps total).

- Add render() function to shared/sexp/jinja_bridge.py
- Add load_service_components() helper and update load_sexp_dir() for *.sexpr
- Update parser keyword regex to support HTMX hx-on::event syntax
- Convert remaining inline HTML in route files to render() calls
- Add shared/sexp/templates/misc.sexp for cross-service utility components

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

shared/sexp/helpers.py

@@ -8,7 +8,7 @@ from __future__ import annotations
 
 from typing import Any
 
-from .jinja_bridge import sexp
+from .jinja_bridge import render
 from .page import SEARCH_HEADERS_MOBILE, SEARCH_HEADERS_DESKTOP
 
 
@@ -31,43 +31,39 @@ def get_asset_url(ctx: dict) -> str:
 
 def root_header_html(ctx: dict, *, oob: bool = False) -> str:
     """Build the root header row HTML."""
-    return sexp(
-        '(~header-row :cart-mini-html cmi :blog-url bu :site-title st'
-        ' :nav-tree-html nth :auth-menu-html amh :nav-panel-html nph'
-        ' :oob oob)',
-        cmi=ctx.get("cart_mini_html", ""),
-        bu=call_url(ctx, "blog_url", ""),
-        st=ctx.get("base_title", ""),
-        nth=ctx.get("nav_tree_html", ""),
-        amh=ctx.get("auth_menu_html", ""),
-        nph=ctx.get("nav_panel_html", ""),
+    return render(
+        "header-row",
+        cart_mini_html=ctx.get("cart_mini_html", ""),
+        blog_url=call_url(ctx, "blog_url", ""),
+        site_title=ctx.get("base_title", ""),
+        nav_tree_html=ctx.get("nav_tree_html", ""),
+        auth_menu_html=ctx.get("auth_menu_html", ""),
+        nav_panel_html=ctx.get("nav_panel_html", ""),
         oob=oob,
     )
 
 
 def search_mobile_html(ctx: dict) -> str:
     """Build mobile search input HTML."""
-    return sexp(
-        '(~search-mobile :current-local-href clh :search s :search-count sc'
-        ' :hx-select hs :search-headers-mobile shm)',
-        clh=ctx.get("current_local_href", "/"),
-        s=ctx.get("search", ""),
-        sc=ctx.get("search_count", ""),
-        hs=ctx.get("hx_select", "#main-panel"),
-        shm=SEARCH_HEADERS_MOBILE,
+    return render(
+        "search-mobile",
+        current_local_href=ctx.get("current_local_href", "/"),
+        search=ctx.get("search", ""),
+        search_count=ctx.get("search_count", ""),
+        hx_select=ctx.get("hx_select", "#main-panel"),
+        search_headers_mobile=SEARCH_HEADERS_MOBILE,
     )
 
 
 def search_desktop_html(ctx: dict) -> str:
     """Build desktop search input HTML."""
-    return sexp(
-        '(~search-desktop :current-local-href clh :search s :search-count sc'
-        ' :hx-select hs :search-headers-desktop shd)',
-        clh=ctx.get("current_local_href", "/"),
-        s=ctx.get("search", ""),
-        sc=ctx.get("search_count", ""),
-        hs=ctx.get("hx_select", "#main-panel"),
-        shd=SEARCH_HEADERS_DESKTOP,
+    return render(
+        "search-desktop",
+        current_local_href=ctx.get("current_local_href", "/"),
+        search=ctx.get("search", ""),
+        search_count=ctx.get("search_count", ""),
+        hx_select=ctx.get("hx_select", "#main-panel"),
+        search_headers_desktop=SEARCH_HEADERS_DESKTOP,
     )
 
 
@@ -76,19 +72,17 @@ def full_page(ctx: dict, *, header_rows_html: str,
               content_html: str = "", menu_html: str = "",
               body_end_html: str = "", meta_html: str = "") -> str:
     """Render a full app page with the standard layout."""
-    return sexp(
-        '(~app-layout :title t :asset-url au :meta-html mh'
-        ' :header-rows-html hrh :menu-html muh :filter-html fh'
-        ' :aside-html ash :content-html ch :body-end-html beh)',
-        t=ctx.get("base_title", "Rose Ash"),
-        au=get_asset_url(ctx),
-        mh=meta_html,
-        hrh=header_rows_html,
-        muh=menu_html,
-        fh=filter_html,
-        ash=aside_html,
-        ch=content_html,
-        beh=body_end_html,
+    return render(
+        "app-layout",
+        title=ctx.get("base_title", "Rose Ash"),
+        asset_url=get_asset_url(ctx),
+        meta_html=meta_html,
+        header_rows_html=header_rows_html,
+        menu_html=menu_html,
+        filter_html=filter_html,
+        aside_html=aside_html,
+        content_html=content_html,
+        body_end_html=body_end_html,
     )
 
 
@@ -96,12 +90,11 @@ def oob_page(ctx: dict, *, oobs_html: str = "",
              filter_html: str = "", aside_html: str = "",
              content_html: str = "", menu_html: str = "") -> str:
     """Render an OOB response with standard swap targets."""
-    return sexp(
-        '(~oob-response :oobs-html oh :filter-html fh :aside-html ash'
-        ' :menu-html mh :content-html ch)',
-        oh=oobs_html,
-        fh=filter_html,
-        ash=aside_html,
-        mh=menu_html,
-        ch=content_html,
+    return render(
+        "oob-response",
+        oobs_html=oobs_html,
+        filter_html=filter_html,
+        aside_html=aside_html,
+        menu_html=menu_html,
+        content_html=content_html,
     )