Whole-project `flutter analyze` exited 1 on 17 pre-existing info/warning
lints (no errors) in dev tools and test files. Clean them so analyze is
green:
- editor_repository_test: drop the redundant sqflite_common import; keep
the used utils import with a transitive-dep ignore.
- pen_* widget tests: `(_, __)` wildcard params -> `(_, _)`.
- search_snippet_test / gen_bench_pdf / gen_dense_strokes: drop needless
interpolation braces; remove an unused `Size` show and an unused local;
mark the gen tool as print-allowed.
No runtime behavior changed. flutter analyze: No issues found. Affected
tests: 22/22 pass.
Two more device-independent live-path guards: the highlighter tool commits a
PenStrokeKind.highlighter stroke; a single finger PANS the shared transform
(translation changes) when finger-drawing is off and does NOT draw — the
touch→pan vs stylus→draw split.
flutter analyze lib/editor clean; 240/240 tests (+2).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
