Make the project page an SEO-optimized overview with a devlog environment

The project detail page becomes a professional project overview: hero
with status/type/dates/forked-from, a stats strip (stars, updates,
comments, files, forks with #devlog/#comments anchors), an About
section, platforms, and the Devlog timeline under a proper h2 - now
rendered with feed.css loaded so the post cards are actually styled.
The owner posts updates from the page itself: a Post update button
opens the shared create-post composer preset to the devlog topic and
this project. The composer form is extracted into
_post_composer_form.html and reused by feed.html - one form, two
surfaces.

SEO: software_application_schema is type-aware via project_schema_type
(game -> VideoGame with gamePlatform, website -> WebApplication,
software/mobile_app -> SoftwareApplication, game_asset -> CreativeWork)
and now carries keywords, image, an aggregateRating from stars, and a
comment InteractionCounter. project_devlog_schema emits a Blog node
with one BlogPosting per devlog entry. The detail route feeds both,
adds meta keywords, and exposes the devlog cursor as rel=next; the
sitemap's project lastmod follows the newest devlog post via one
grouped query. devlog_count/comment_count ride ProjectDetailOut, the
docs projects-detail endpoint documents the before cursor, and the
routers/projects CLAUDE.md, templates CLAUDE.md and README document the
new surface. Unit, api and e2e tests cover the schema mapping, the
JSON-LD in the rendered page, the stats strip, and the preset composer.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/e2e/projects/devlog.py

@@ -85,7 +85,7 @@ def test_devlog_empty_state_on_project_page(alice):
 
     devlog_section = page.locator(".project-devlog")
     expect(devlog_section).to_be_visible()
-    expect(devlog_section.locator("h3:has-text('Devlog')")).to_be_visible()
+    expect(devlog_section.locator("h2:has-text('Devlog')")).to_be_visible()
     expect(page.locator(".empty-state:has-text('No devlog posts yet.')")).to_be_visible()
 
 
@@ -187,3 +187,43 @@ def test_devlog_multiple_posts_order(alice):
         f"Expected newest post first: {markers[-1]}, got: {first_text}"
     )
 
+
+def test_project_stats_strip_visible(alice):
+    """The overview stats strip shows stars, updates, comments, files, forks."""
+    page, _ = alice
+    slug, project_uid, owner_uid = _seed_project()
+    _seed_project_post(project_uid, owner_uid, 0)
+
+    page.goto(f"{BASE_URL}/projects/{slug}", wait_until="domcontentloaded")
+
+    stats = page.locator(".project-stats")
+    expect(stats).to_be_visible()
+    expect(stats.locator(".project-stat")).to_have_count(5)
+    expect(stats.locator(".project-stat:has-text('update')")).to_contain_text("1")
+
+
+def test_owner_post_update_button_opens_preset_composer(alice):
+    """The owner's Post update button opens the composer preselected to this project."""
+    page, _ = alice
+    _create_project_ui(page, f"Composer Project {uuid4().hex[:6]}")
+
+    button = page.locator(".project-devlog-post-btn")
+    expect(button).to_be_visible()
+    button.click()
+
+    modal = page.locator("#create-post-modal")
+    expect(modal).to_be_visible()
+    expect(modal.locator("input[name='topic'][value='devlog']")).to_be_checked()
+    selected = modal.locator("#project_uid").input_value()
+    assert selected != "", "Expected the project preselected in the composer"
+
+
+def test_guest_sees_no_post_update_button(app_server):
+    """Guests and non-owners get no Post update control."""
+    import requests
+
+    slug, _, _ = _seed_project()
+    r = requests.get(f"{BASE_URL}/projects/{slug}")
+    assert r.status_code == 200
+    assert "project-devlog-post-btn" not in r.text
+