Migrate all apps to defpage declarative page routes

Replace Python GET page handlers with declarative defpage definitions in .sx
files across all 8 apps (sx docs, orders, account, market, cart, federation,
events, blog). Each app now has sxc/pages/ with setup functions, layout
registrations, page helpers, and .sx defpage declarations.

Core infrastructure: add g I/O primitive, PageDef support for auth/layout/
data/content/filter/aside/menu slots, post_author auth level, and custom
layout registration. Remove ~1400 lines of render_*_page/render_*_oob
boilerplate. Update all endpoint references in routes, sx_components, and
templates to defpage_* naming.

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

sx/sxc/sx_components.py

@@ -6,8 +6,6 @@ import os
 from shared.sx.jinja_bridge import load_sx_dir, watch_sx_dir
 from shared.sx.helpers import (
     sx_call, SxExpr, get_asset_url,
-    root_header_sx, full_page_sx,
-    oob_header_sx, oob_page_sx,
 )
 from content.highlight import highlight
 
@@ -17,10 +15,6 @@ load_sx_dir(_sxc_dir)
 watch_sx_dir(_sxc_dir)
 
 
-def _full_page(ctx: dict, **kwargs) -> str:
-    """full_page_sx wrapper."""
-    return full_page_sx(ctx, **kwargs)
-
 
 def _code(code: str, language: str = "lisp") -> str:
     """Build a ~doc-code component with highlighted content."""
@@ -168,13 +162,6 @@ def _main_nav_sx(current_section: str | None = None) -> str:
     return _nav_items_sx(MAIN_NAV, current_section)
 
 
-def _header_stack_sx(ctx: dict, section_nav: str | None = None) -> str:
-    """Full header stack: root header + sx menu row."""
-    hdr = root_header_sx(ctx)
-    sx_row = _sx_header_sx(section_nav)
-    return "(<> " + hdr + " " + sx_row + ")"
-
-
 def _sub_row_sx(sub_label: str, sub_href: str, sub_nav: str,
                 selected: str = "") -> str:
     """Build the level-2 sub-section menu-row."""
@@ -186,104 +173,6 @@ def _sub_row_sx(sub_label: str, sub_href: str, sub_nav: str,
     )
 
 
-def _section_header_stack_sx(ctx: dict, main_nav: str, sub_nav: str,
-                              sub_label: str, sub_href: str,
-                              selected: str = "") -> str:
-    """Header stack with main nav + sub-section nav row."""
-    hdr = root_header_sx(ctx)
-    sub_row = _sub_row_sx(sub_label, sub_href, sub_nav, selected)
-    sx_row = _sx_header_sx(main_nav, child=sub_row)
-    return "(<> " + hdr + " " + sx_row + ")"
-
-
-# ---------------------------------------------------------------------------
-# OOB helpers — rebuild header rows for AJAX navigation
-# ---------------------------------------------------------------------------
-
-async def _section_oob_sx(section: str, sub_label: str, sub_href: str,
-                          sub_nav: str, content: str,
-                          selected: str = "") -> str:
-    """Generic OOB response: rebuild both header rows + content."""
-    from shared.sx.page import get_template_context
-    ctx = await get_template_context()
-    root_hdr = root_header_sx(ctx)
-    main_nav = _main_nav_sx(section)
-    sub_row = _sub_row_sx(sub_label, sub_href, sub_nav, selected)
-    sx_row = _sx_header_sx(main_nav, child=sub_row)
-    rows = "(<> " + root_hdr + " " + sx_row + ")"
-    header_oob = oob_header_sx("root-header-child", "sx-header-child", rows)
-    return oob_page_sx(oobs=header_oob, content=content)
-
-
-async def home_oob_sx() -> str:
-    """OOB response for home page navigation."""
-    from shared.sx.page import get_template_context
-    ctx = await get_template_context()
-    root_hdr = root_header_sx(ctx)
-    main_nav = _main_nav_sx()
-    sx_row = _sx_header_sx(main_nav)
-    rows = "(<> " + root_hdr + " " + sx_row + ")"
-    header_oob = oob_header_sx("root-header-child", "sx-header-child", rows)
-    hero_code = highlight('(div :class "p-4 bg-white rounded shadow"\n'
-                          '  (h1 :class "text-2xl font-bold" "Hello")\n'
-                          '  (button :sx-get "/api/data"\n'
-                          '    :sx-target "#result"\n'
-                          '    "Load data"))', "lisp")
-    content = (
-        f'(div :id "main-content"'
-        f' (~sx-hero {hero_code})'
-        f' (~sx-philosophy)'
-        f' (~sx-how-it-works)'
-        f' (~sx-credits))'
-    )
-    return oob_page_sx(oobs=header_oob, content=content)
-
-
-async def docs_oob_sx(slug: str) -> str:
-    """OOB response for docs section navigation."""
-    from content.pages import DOCS_NAV
-    current = next((label for label, href in DOCS_NAV if href.endswith(slug)), None)
-    sub_nav = _docs_nav_sx(current)
-    return await _section_oob_sx("Docs", "Docs", "/docs/introduction", sub_nav,
-                                 _docs_content_sx(slug), selected=current or "")
-
-
-async def reference_oob_sx(slug: str) -> str:
-    """OOB response for reference section navigation."""
-    from content.pages import REFERENCE_NAV
-    current = next((label for label, href in REFERENCE_NAV
-                    if href.rstrip("/").endswith(slug or "reference")), "Attributes")
-    sub_nav = _reference_nav_sx(current)
-    return await _section_oob_sx("Reference", "Reference", "/reference/", sub_nav,
-                                 _reference_content_sx(slug), selected=current or "")
-
-
-async def protocol_oob_sx(slug: str) -> str:
-    """OOB response for protocols section navigation."""
-    from content.pages import PROTOCOLS_NAV
-    current = next((label for label, href in PROTOCOLS_NAV if href.endswith(slug)), None)
-    sub_nav = _protocols_nav_sx(current)
-    return await _section_oob_sx("Protocols", "Protocols", "/protocols/wire-format", sub_nav,
-                                 _protocol_content_sx(slug), selected=current or "")
-
-
-async def examples_oob_sx(slug: str) -> str:
-    """OOB response for examples section navigation."""
-    from content.pages import EXAMPLES_NAV
-    current = next((label for label, href in EXAMPLES_NAV if href.endswith(slug)), None)
-    sub_nav = _examples_nav_sx(current)
-    return await _section_oob_sx("Examples", "Examples", "/examples/click-to-load", sub_nav,
-                                 _examples_content_sx(slug), selected=current or "")
-
-
-async def essay_oob_sx(slug: str) -> str:
-    """OOB response for essays section navigation."""
-    from content.pages import ESSAYS_NAV
-    current = next((label for label, href in ESSAYS_NAV if href.endswith(slug)), None)
-    sub_nav = _essays_nav_sx(current)
-    return await _section_oob_sx("Essays", "Essays", "/essays/sx-sucks", sub_nav,
-                                 _essay_content_sx(slug), selected=current or "")
-
 
 # ---------------------------------------------------------------------------
 # Content builders — return sx source strings
@@ -352,40 +241,6 @@ def _headers_table_sx(title: str, headers: list[tuple[str, str, str]]) -> str:
     )
 
 
-# ---------------------------------------------------------------------------
-# Page renderers — async functions returning full HTML
-# ---------------------------------------------------------------------------
-
-async def render_home_page_sx(ctx: dict) -> str:
-    """Full page: home."""
-    main_nav = _main_nav_sx()
-    hdr = _header_stack_sx(ctx, main_nav)
-    hero_code = highlight('(div :class "p-4 bg-white rounded shadow"\n'
-                          '  (h1 :class "text-2xl font-bold" "Hello")\n'
-                          '  (button :sx-get "/api/data"\n'
-                          '    :sx-target "#result"\n'
-                          '    "Load data"))', "lisp")
-    content = (
-        f'(div :id "main-content"'
-        f' (~sx-hero {hero_code})'
-        f' (~sx-philosophy)'
-        f' (~sx-how-it-works)'
-        f' (~sx-credits))'
-    )
-    return _full_page(ctx, header_rows=hdr, content=content)
-
-
-async def render_docs_page_sx(ctx: dict, slug: str) -> str:
-    """Full page: docs section."""
-    from content.pages import DOCS_NAV
-    current = next((label for label, href in DOCS_NAV if href.endswith(slug)), None)
-    main_nav = _main_nav_sx("Docs")
-    sub_nav = _docs_nav_sx(current)
-    hdr = _section_header_stack_sx(ctx, main_nav, sub_nav, "Docs", "/docs/introduction",
-                                    selected=current or "")
-    content = _docs_content_sx(slug)
-    return _full_page(ctx, header_rows=hdr, content=content)
-
 
 def _docs_content_sx(slug: str) -> str:
     """Route to the right docs content builder."""
@@ -613,19 +468,6 @@ def _docs_server_rendering_sx() -> str:
 # Reference pages
 # ---------------------------------------------------------------------------
 
-async def render_reference_page_sx(ctx: dict, slug: str) -> str:
-    """Full page: reference section."""
-    from content.pages import REFERENCE_NAV
-    current = next((label for label, href in REFERENCE_NAV
-                    if href.rstrip("/").endswith(slug or "reference")), "Attributes")
-    main_nav = _main_nav_sx("Reference")
-    sub_nav = _reference_nav_sx(current)
-    hdr = _section_header_stack_sx(ctx, main_nav, sub_nav, "Reference", "/reference/",
-                                    selected=current or "")
-    content = _reference_content_sx(slug)
-    return _full_page(ctx, header_rows=hdr, content=content)
-
-
 def _reference_content_sx(slug: str) -> str:
     builders = {
         "": _reference_attrs_sx,
@@ -712,18 +554,6 @@ def _reference_js_api_sx() -> str:
 # Protocol pages
 # ---------------------------------------------------------------------------
 
-async def render_protocol_page_sx(ctx: dict, slug: str) -> str:
-    """Full page: protocols section."""
-    from content.pages import PROTOCOLS_NAV
-    current = next((label for label, href in PROTOCOLS_NAV if href.endswith(slug)), None)
-    main_nav = _main_nav_sx("Protocols")
-    sub_nav = _protocols_nav_sx(current)
-    hdr = _section_header_stack_sx(ctx, main_nav, sub_nav, "Protocols", "/protocols/wire-format",
-                                    selected=current or "")
-    content = _protocol_content_sx(slug)
-    return _full_page(ctx, header_rows=hdr, content=content)
-
-
 def _protocol_content_sx(slug: str) -> str:
     builders = {
         "wire-format": _protocol_wire_format_sx,
@@ -887,18 +717,6 @@ def _protocol_future_sx() -> str:
 # Examples pages
 # ---------------------------------------------------------------------------
 
-async def render_examples_page_sx(ctx: dict, slug: str) -> str:
-    """Full page: examples section."""
-    from content.pages import EXAMPLES_NAV
-    current = next((label for label, href in EXAMPLES_NAV if href.endswith(slug)), None)
-    main_nav = _main_nav_sx("Examples")
-    sub_nav = _examples_nav_sx(current)
-    hdr = _section_header_stack_sx(ctx, main_nav, sub_nav, "Examples", "/examples/click-to-load",
-                                    selected=current or "")
-    content = _examples_content_sx(slug)
-    return _full_page(ctx, header_rows=hdr, content=content)
-
-
 def _examples_content_sx(slug: str) -> str:
     builders = {
         "click-to-load": _example_click_to_load_sx,
@@ -1948,18 +1766,6 @@ def _example_retry_sx() -> str:
 # Essays
 # ---------------------------------------------------------------------------
 
-async def render_essay_page_sx(ctx: dict, slug: str) -> str:
-    """Full page: essays section."""
-    from content.pages import ESSAYS_NAV
-    current = next((label for label, href in ESSAYS_NAV if href.endswith(slug)), None)
-    main_nav = _main_nav_sx("Essays")
-    sub_nav = _essays_nav_sx(current)
-    hdr = _section_header_stack_sx(ctx, main_nav, sub_nav, "Essays", "/essays/sx-sucks",
-                                    selected=current or "")
-    content = _essay_content_sx(slug)
-    return _full_page(ctx, header_rows=hdr, content=content)
-
-
 def _essay_content_sx(slug: str) -> str:
     builders = {
         "sx-sucks": _essay_sx_sucks,