"All examples" back-link uses ↑ (up arrow) instead of ← (left arrow)

The link goes to a higher-level index page (/), not to a sibling
page. ↑ conveys the up-the-hierarchy navigation; ← would mean
"previous page in sequence". Three call sites updated:

  - src/templates/example.html (example page chrome)
  - src/app.py (journey page chrome)
  - scripts/build_prototypes.py (prototype example rendering)

Left ← arrows kept where they're correct: "← Current layout" on
/layout-options/* (side-to-side), and the prev-example link in
the example-nav block (sequence navigation).

Author: claude

scripts/build_prototypes.py

@@ -102,7 +102,7 @@ def render_article(example: dict, *, banners: dict[str, str] | None = None) -> s
     output = html.escape(example.get("expected_output", ""))
     return f"""
 <article class="example-shell">
-  <div class="example-top"><a class="text-link" href="/">← All examples</a><a class="text-link" href="{html.escape(example['doc_url'])}">Python docs reference</a></div>
+  <div class="example-top"><a class="text-link" href="/">↑ All examples</a><a class="text-link" href="{html.escape(example['doc_url'])}">Python docs reference</a></div>
   <section class="example-intro">
     <p class="eyebrow">{html.escape(example['section'])}</p>
     <h1>{html.escape(example['title'])}</h1>

src/app.py

@@ -576,7 +576,7 @@ def render_journey_page(journey):
         sections.append(f'<section class="journey-section"><h2>{html.escape(section["title"])}</h2><p class="meta">{html.escape(section["summary"])}</p>{figure_html}<ul class="journey-list">{"".join(rows)}</ul></section>')
     content = f'''
 <article class="example-shell journey-page">
-  <div class="example-top"><a class="text-link" href="/">← All examples</a><a class="text-link" href="{html.escape(REFERENCE_URL)}">Python docs reference</a></div>
+  <div class="example-top"><a class="text-link" href="/">↑ All examples</a><a class="text-link" href="{html.escape(REFERENCE_URL)}">Python docs reference</a></div>
   <section class="example-intro">
     <p class="eyebrow">Journey</p>
     <h1>{html.escape(journey["title"])}</h1>

src/asset_manifest.py

@@ -1,3 +1,3 @@
 # Generated by scripts/fingerprint_assets.py. Do not edit by hand.
 ASSET_PATHS = {'SITE_CSS': '/site.b5d5cf89f344.css', 'SYNTAX_JS': '/syntax-highlight.3b6c7f730d46.js', 'EDITOR_JS': '/editor.dd81f5171b14.js'}
-HTML_CACHE_VERSION = 'a7b91f426795'
+HTML_CACHE_VERSION = 'b61de6981e3d'

src/templates/example.html

@@ -1,5 +1,5 @@
 <article class="example-shell">
-  <div class="example-top"><a class="text-link" href="/">← All examples</a><a class="text-link" href="__DOC_URL__">Python docs reference</a></div>
+  <div class="example-top"><a class="text-link" href="/">↑ All examples</a><a class="text-link" href="__DOC_URL__">Python docs reference</a></div>
   <section class="example-intro">
     <p class="eyebrow">__SECTION__</p>
     <h1>__TITLE__</h1>