ignore local build, venv, log, and scratch artefacts

Root-anchored ignores for Flutter build output (dist/), the Python venv
(.venv/), coverage and logs, the firebase debug log, and two stray
root-level Python trees (clide/, tests/) that aren't the Dart test/ dir.
Keeps git status clean without committing machine-local artefacts.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -121,3 +121,13 @@ legacy/**/.coverage.*
 .pql/*
 !.pql/changelog/
 !.pql/pql-plan.json
+
+# -- Local build / env artefacts (root-anchored; never tracked) ---------
+/.coverage
+/.venv/
+/dist/
+/logs/
+/firebase-debug.log
+# stray Python trees at the root (the real Dart suite is test/, singular)
+/clide/
+/tests/