feat(vault-tui): create/edit identities in the add/edit form (curated)

[UnbreakableMJ]

What

The TUI's a/e form now creates and edits identity (type 4) ciphers — the Type row cycles login → secure note → card → identity. With this, all four cipher types are editable from both front-ends (CLI + TUI).

No backend change — it builds the IdentityWrite payload that already rides Request::Add/Edit (PR #27).

Scope: curated, no scroll

The form overlay (render_form) renders all rows into one non-scrolling Paragraph. Identity's full 18 fields would overflow it, so the form edits a curated 10-field subset (title, first/last name, email, phone, address1, city, state, postal code, country). The long-tail fields (middle name, identity-username, company, address2/3) and the three secrets (SSN/passport/license) stay CLI-only.

How (crates/vault-tui/ only)

• app.rs — F_TITLE..F_COUNTRY rows; visible_fields/blank_fields grow the identity subset; toggle_type cycles through type 4; type_label → "identity". New FormSubmit.identity (IdentityFields, all non-secret). submit() takes the curated fields and folds them into the edit "no changes" gate. new_edit prefills email/phone from the detail pane — the pane's Person/Address are composites that can't be split back, so the rest start blank = leave-unchanged.
• main.rs — submit_form builds IdentityWrite when the type is identity and threads it into both Request::Add and Request::Edit.

Tests

• identity add carries the curated fields
• identity edit prefills email/phone and diffs only the changed city
• updated type_toggle_swaps_visible_fields_preserving_values for the 4-way cycle

cargo fmt --check, fresh-isolated clippy -D warnings, cargo test --workspace --all-targets (71 TUI tests), cargo deny check, and both headless builds all clean.

Out of scope (tracked follow-ups)

• Long-tail identity fields + the SSN/passport/license secrets in the TUI — needs form scrolling and/or per-field identity read selectors for prefill.
• A Field::CardCardholder read selector; per-field TUI reveal/copy for long-tail fields + card CVV.

🤖 Generated with Claude Code