Improve localization and optional widget positioning controls #14

P2 follow-up; optional UX beyond the stabilized core.

• Define consistent per-control labels/localization and accessible numeric announcements.
• Consider a persisted position picker and optional dragging with an equivalent non-drag control.
• Require keyboard/touch/pointer parity, safe areas, zoom/reflow and no activation or hit-testing regressions.
• Keep runtime dependencies proportionate; update API/migration/examples for approved changes.

Acceptance: agreed UX contract, accessible alternatives and meaningful package/browser tests. Cross-tab or multiple-provider arbitration remains separately deferred pending usage evidence.

References: roadmap, development/acceptance guide.