scaffold decisions/ with backlog from planning sessions

Adopt settled-reach's Q&D record convention. Confirmed decisions
live under decisions/<domain>.md as D-NNN; open questions under
questions-<domain>.md as Q-NNN; rejected alternatives in rejected.md
as R-NNN. Markdown is source of truth; .pql/pql.db (added later) is a
query index.

Backlog captured from the Tier-0 Flutter planning sessions: bare
WidgetsApp, theme pipeline, kernel admission rule, feature-first
layout, a11y + i18n as Tier-0 contracts, test pyramid, kanban over
Scrum, pql-owns-planning, Python stopgap sunset clause.

ADR migration (D-001, D-003-D-006 confirmed, R-002 rejected) is
staged for the next commit so the diff stays readable.

Co-Authored-By: Claude <noreply@anthropic.com>

decisions/questions-testing.md

@@ -0,0 +1,17 @@
+# Open Questions — Testing
+
+---
+
+### Q-011: Coverage gates — hard thresholds vs soft reporting
+- **Status:** Open
+- **Question:** `ci/test_coverage.sh` emits lcov + a summary. Do we gate merges on a hard threshold (fail < 80%), report softly, or tier per directory (kernel > 90%, built-ins > 70%, widgets covered by goldens exempt)?
+- **Context:** Hard thresholds force tests-for-coverage-sake; soft reporting gets ignored.
+- **Source:** 2026-04-21 planning.
+
+### Q-012: Screen-reader automation (axe-core via Playwright)
+- **Status:** Open
+- **Question:** [D-022](accessibility.md#d-022-wcag-aa-contrast-gate-on-bundled-themes) gates contrast at build time. Do we also run axe-core against the WASM build in Playwright for runtime a11y issues (missing labels, invalid roles, orphan focusables)?
+- **Context:** axe-core is JS; runs in the browser against the rendered tree. Extra CI time; extra signal.
+- **Source:** 2026-04-21 planning.
+
+---