Every tool now returns a structured BaseModel instead of dict[str, Any],
giving callers attribute access, IDE autocomplete, and schema validation.
Adds ~30 model classes to models.py and updates all test assertions.
Test infrastructure with conftest fixtures mocking run_shell_args/run_adb
for device-free testing across all 8 mixins.
Fixed: UI parser regex couldn't match hyphenated XML attributes
(content-desc, resource-id). Notification parser captured trailing
parenthesis in package names.
