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/unit/seo.py

@@ -49,6 +49,77 @@ def test_news_article_publisher_is_organization():
     assert schema["publisher"]["@type"] == "Organization"
 
 
+def test_project_schema_type_mapping():
+    assert seo.project_schema_type("game") == "VideoGame"
+    assert seo.project_schema_type("game_asset") == "CreativeWork"
+    assert seo.project_schema_type("website") == "WebApplication"
+    assert seo.project_schema_type("software") == "SoftwareApplication"
+    assert seo.project_schema_type("mobile_app") == "SoftwareApplication"
+    assert seo.project_schema_type(None) == "SoftwareApplication"
+    assert seo.project_schema_type("unknown") == "SoftwareApplication"
+
+
+def test_software_application_schema_is_type_aware():
+    game = seo.software_application_schema(
+        {"uid": "p1", "slug": "p1-g", "title": "G", "project_type": "game", "platforms": "PC, Web"},
+        "https://x.test",
+    )
+    assert game["@type"] == "VideoGame"
+    assert game["gamePlatform"] == ["PC", "Web"]
+    assert "applicationCategory" not in game
+    web = seo.software_application_schema(
+        {"uid": "p2", "slug": "p2-w", "title": "W", "project_type": "website"},
+        "https://x.test",
+    )
+    assert web["@type"] == "WebApplication"
+    assert web["browserRequirements"] == "Requires JavaScript"
+    assert web["applicationCategory"] == "DeveloperApplication"
+
+
+def test_software_application_schema_rating_and_image():
+    project = {"uid": "p1", "slug": "p1-s", "title": "S", "project_type": "software"}
+    plain = seo.software_application_schema(project, "https://x.test")
+    assert "aggregateRating" not in plain
+    assert "image" not in plain
+    rich = seo.software_application_schema(
+        project,
+        "https://x.test",
+        image_url="https://x.test/img.png",
+        star_count=7,
+        comment_count=3,
+    )
+    assert rich["aggregateRating"]["ratingCount"] == "7"
+    assert rich["image"] == "https://x.test/img.png"
+    assert rich["interactionStatistic"]["userInteractionCount"] == 3
+
+
+def test_project_devlog_schema_builds_blog_graph():
+    project = {"uid": "p1", "slug": "p1-s", "title": "Nebula"}
+    assert seo.project_devlog_schema(project, [], "https://x.test") is None
+    posts = [
+        {
+            "post": {
+                "uid": "a1",
+                "slug": "a1-first",
+                "title": "First update",
+                "content": "Progress!",
+                "created_at": "2026-01-01T00:00:00+00:00",
+            },
+            "author": {"username": "dev"},
+            "comment_count": 2,
+        }
+    ]
+    schema = seo.project_devlog_schema(project, posts, "https://x.test")
+    assert schema["@type"] == "Blog"
+    assert schema["url"] == "https://x.test/projects/p1-s#devlog"
+    entry = schema["blogPost"][0]
+    assert entry["@type"] == "BlogPosting"
+    assert entry["headline"] == "First update"
+    assert entry["url"] == "https://x.test/posts/a1-first"
+    assert entry["author"]["name"] == "dev"
+    assert entry["commentCount"] == 2
+
+
 def test_site_url_precedence(monkeypatch):
     import devplacepy.database as database