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_star_handler.py

@@ -0,0 +1,32 @@
+"""Import smoke tests for astrbot.core.star.star_handler."""
+from astrbot.core.star.star_handler import (
+    StarHandlerRegistry,
+    StarHandlerMetadata,
+    EventType,
+    star_handlers_registry,
+)
+
+
+def test_star_handler_registry_class():
+    """StarHandlerRegistry is importable and is a class."""
+    assert isinstance(StarHandlerRegistry, type)
+
+
+def test_star_handler_registry_default_instance():
+    """star_handlers_registry is a module-level StarHandlerRegistry instance."""
+    assert isinstance(star_handlers_registry, StarHandlerRegistry)
+
+
+def test_star_handler_metadata_class():
+    """StarHandlerMetadata is importable and is a dataclass."""
+    assert isinstance(StarHandlerMetadata, type)
+
+
+def test_event_type_enum():
+    """EventType is an enum with expected members."""
+    assert hasattr(EventType, "AdapterMessageEvent")
+    assert hasattr(EventType, "OnLLMRequestEvent")
+    assert hasattr(EventType, "OnLLMResponseEvent")
+    assert hasattr(EventType, "OnAstrBotLoadedEvent")
+    assert hasattr(EventType, "OnPluginLoadedEvent")
+    assert hasattr(EventType, "OnPluginUnloadedEvent")