TUI card editor

[aksOps]

Question

Create and edit forms: title, emoji (single-pictographic validation matching the wire rule), description, priority, due date picker, effort, blocked, labels with suggestion combobox semantics, checklist as lines with x-prefix. Unsaved-changes guard on close; a refused save keeps the form open with the error (the pre-freeze contracts). Similar-items panel with dismissals and killed-card chips. Resolution: merged PR.

Part of #80.

Blocked by: #86

[aksOps]

Resolved by PR #105, squash-merged as afbb6297fe38f43e2e82738d02937f0688ef20b7.

Acceptance verified: direct-store create/edit overlay, field-selective transactional conflict refusal, stale-session isolation, local-calendar due handling, label/checklist/similar context, dirty refresh preservation, canonical created-card selection, and filter-aware root integration. Exact-head Regression, Sonar, CodeQL, and Socket checks passed.