test: comprehensive test coverage and type fixes

- Add 100+ new test files covering provider sources, platform adapters,
  agent runners, star/plugin system, knowledge base, core utils,
  pipeline, computer tools, builtin commands, and dashboard routes
- Fix Python type errors in sqlite.py (col() wrappers for SQLModel),
  astr_agent_tool_exec, core_lifecycle, star context/manager
- Fix TypeScript strict mode errors across 30+ dashboard Vue files
- Add import smoke tests, auth roundtrip, startup tests
- Add compile-all check and CLI entry test for AUR compatibility
- Restore BotMessageAccumulator and helpers lost in merge

tests/test_url_parser.py

@@ -0,0 +1,20 @@
+"""Import smoke tests for the URL parser module."""
+
+from __future__ import annotations
+
+from astrbot.core.knowledge_base.parsers.url_parser import (
+    URLExtractor,
+    extract_text_from_url,
+)
+
+
+class TestURLExtractorImports:
+    """Verify that the main class and helper function from url_parser can be imported."""
+
+    def test_import_url_extractor(self):
+        assert URLExtractor is not None
+        assert hasattr(URLExtractor, "extract_text_from_url")
+
+    def test_import_extract_text_from_url_function(self):
+        assert extract_text_from_url is not None
+        assert callable(extract_text_from_url)