fix: resolve typecheck errors in cache, atcoder, cses, and usaco

Problem: lua typecheck flagged missing start_time field on ContestSummary;
ty flagged BeautifulSoup Tag/NavigableString union on csrf_input.get(),
a 3-tuple unpack where _extract_problem_info now returns 4 values in
cses.py, and an untyped list assignment in usaco.py.

Solution: add start_time? to ContestSummary LuaDoc, guard csrf_input
with hasattr check and type: ignore, unpack precision from
_extract_problem_info in cses.py callers, and use cast() in usaco.py.

lua/cp/cache.lua

@@ -15,6 +15,7 @@
 ---@field display_name string
 ---@field name string
 ---@field id string
+---@field start_time? integer
 
 ---@class CombinedTest
 ---@field input string

scrapers/atcoder.py

@@ -385,11 +385,11 @@ class AtcoderScraper(BaseScraper):
                 login_page.raise_for_status()
                 soup = BeautifulSoup(login_page.text, "html.parser")
                 csrf_input = soup.find("input", {"name": "csrf_token"})
-                if not csrf_input:
+                if not csrf_input or not hasattr(csrf_input, "get"):
                     return SubmitResult(
                         success=False, error="Could not find CSRF token on login page"
                     )
-                csrf_token = csrf_input.get("value", "")
+                csrf_token = csrf_input.get("value", "") or ""  # type: ignore[union-attr]
 
                 login_resp = _session.post(
                     f"{BASE_URL}/login",
@@ -411,11 +411,11 @@ class AtcoderScraper(BaseScraper):
                 submit_page.raise_for_status()
                 soup = BeautifulSoup(submit_page.text, "html.parser")
                 csrf_input = soup.find("input", {"name": "csrf_token"})
-                if not csrf_input:
+                if not csrf_input or not hasattr(csrf_input, "get"):
                     return SubmitResult(
                         success=False, error="Could not find CSRF token on submit page"
                     )
-                csrf_token = csrf_input.get("value", "")
+                csrf_token = csrf_input.get("value", "") or ""  # type: ignore[union-attr]
 
                 task_screen_name = f"{contest_id}_{problem_id}"
                 submit_resp = _session.post(

scrapers/cses.py

@@ -232,10 +232,17 @@ class CSESScraper(BaseScraper):
                     try:
                         html = await fetch_text(client, task_path(pid))
                         tests = parse_tests(html)
-                        timeout_ms, memory_mb, interactive = _extract_problem_info(html)
+                        timeout_ms, memory_mb, interactive, precision = (
+                            _extract_problem_info(html)
+                        )
                     except Exception:
                         tests = []
-                        timeout_ms, memory_mb, interactive = 0, 0, False
+                        timeout_ms, memory_mb, interactive, precision = (
+                            0,
+                            0,
+                            False,
+                            None,
+                        )
 
                     combined_input = "\n".join(t.input for t in tests) if tests else ""
                     combined_expected = (
@@ -255,6 +262,7 @@ class CSESScraper(BaseScraper):
                         "memory_mb": memory_mb,
                         "interactive": interactive,
                         "multi_test": False,
+                        "precision": precision,
                     }
 
             tasks = [run_one(p.id) for p in problems]

scrapers/usaco.py

@@ -3,7 +3,7 @@
 import asyncio
 import json
 import re
-from typing import Any
+from typing import Any, cast
 
 import httpx
 
@@ -253,7 +253,7 @@ class USACOScraper(BaseScraper):
                             "interactive": False,
                         }
 
-                    tests: list[TestCase] = info["tests"]
+                    tests = cast(list[TestCase], info["tests"])
                     combined_input = "\n".join(t.input for t in tests) if tests else ""
                     combined_expected = (
                         "\n".join(t.expected for t in tests) if tests else ""