The model selector dropdown was rendered inside the modal scroll container. When the task form sat near the top of the dialog, the upward-opening menu could be clipped by the container and become impossible to scroll into view. The selector now portals the menu to the document body and positions it against the trigger with viewport-aware fixed coordinates.
Constraint: The same selector is used by chat/session controls and scheduled-task controls, so the fix must preserve existing runtime selection behavior.
Rejected: Increase modal scroll padding | still leaves the dropdown coupled to a clipping parent and breaks in other overflow containers.
Confidence: high
Scope-risk: narrow
Directive: Keep floating selector content outside scroll-clipping parents; update viewport positioning if the modal layout changes.
Tested: cd desktop && bun run test -- src/components/controls/ModelSelector.test.tsx src/components/tasks/NewTaskModal.test.tsx
Tested: bun run check:desktop
Tested: git diff --check
Not-tested: Manual packaged desktop app check.
Contributors and coding agents need one local command that both reports and enforces the quality contract. This change turns the PR gate into the shared verification entrypoint, adds path-selected local lanes, tightens coverage accounting around changed lines, and documents the repair loop in contributor and agent-facing guidance.
Constraint: Ordinary PR verification must stay non-live and runnable without provider credentials
Constraint: Coverage policy updates in this commit require maintainer approval before push/merge
Rejected: Keep quality guidance only in docs | agents need executable scripts and AGENTS.md instructions to follow the loop consistently
Confidence: high
Scope-risk: broad
Directive: Do not bypass `bun run verify` for production changes; fix failed lanes and coverage reports instead of lowering thresholds
Tested: bun run check:policy
Tested: ALLOW_CLI_CORE_CHANGE=1 ALLOW_COVERAGE_BASELINE_CHANGE=1 bun run verify
Not-tested: live provider baseline; no provider credentials were required for this non-live PR gate
