v0.5.115: add History routing and SEO prerender for Climperor Web.

Path URLs, crawlable hero/mechanics pages, and sitemap make the static site indexable while keeping SPA hydration.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/serve_relations.py

@@ -1115,11 +1115,29 @@ class Handler(BaseHTTPRequestHandler):
             return
         rel = path.lstrip("/")
         candidate = (WEB_DIR / rel).resolve()
-        if not str(candidate).startswith(str(WEB_DIR.resolve())) or not candidate.is_file():
-            self.send_error(404)
+        web_root = WEB_DIR.resolve()
+        if str(candidate).startswith(str(web_root)) and candidate.is_file():
+            ctype = mimetypes.guess_type(str(candidate))[0] or "application/octet-stream"
+            self._send(200, candidate.read_bytes(), ctype)
             return
-        ctype = mimetypes.guess_type(str(candidate))[0] or "application/octet-stream"
-        self._send(200, candidate.read_bytes(), ctype)
+        # History SPA fallback: /heroes/axe → index.html (client router).
+        spa_pages = {
+            "heroes",
+            "rankings",
+            "matches",
+            "streamers",
+            "trends",
+            "mechanics",
+            "items",
+            "patches",
+        }
+        first = path.strip("/").split("/", 1)[0] if path.strip("/") else ""
+        if first in spa_pages:
+            index = WEB_DIR / "index.html"
+            if index.is_file():
+                self._send(200, index.read_bytes(), "text/html; charset=utf-8")
+                return
+        self.send_error(404)
 
     def do_POST(self) -> None:  # noqa: N802
         path = urlparse(self.path).path