refactor(build): remove StarData TypedDict, loosen load_stars return to dict[str, dict]

Cache-write shape mismatches the TypedDict and callers mix .get() and
direct access, so the stricter type was providing false safety. Using
dict[str, dict] accurately reflects the actual runtime contract.

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

website/build.py

@@ -6,19 +6,10 @@ import re
 import shutil
 from datetime import UTC, datetime
 from pathlib import Path
-from typing import TypedDict
 
 from jinja2 import Environment, FileSystemLoader
 from readme_parser import ParsedGroup, ParsedSection, parse_readme, parse_sponsors
 
-
-class StarData(TypedDict):
-    stars: int
-    owner: str
-    last_commit_at: str
-    fetched_at: str
-
-
 GITHUB_REPO_URL_RE = re.compile(r"^https?://github\.com/([^/]+/[^/]+?)(?:\.git)?/?$")
 
 SOURCE_TYPE_DOMAINS = {
@@ -46,7 +37,7 @@ def extract_github_repo(url: str) -> str | None:
     return m.group(1) if m else None
 
 
-def load_stars(path: Path) -> dict[str, StarData]:
+def load_stars(path: Path) -> dict[str, dict]:
     """Load star data from JSON. Returns empty dict if file doesn't exist or is corrupt."""
     if path.exists():
         try: