feat(ogar-render-askama): W2/W3 fieldview — the addressed desktop surface

[AdaWorldAPI]

What

Adds ogar-render-askama::field_view — the render half of the A2UI
screen-addressing charter (docs/A2UI-SCREEN-ADDRESSING-PROPOSAL.md, C1.2):
a WideFieldMask-projected ClassView instance renders as an addressed
surface rather than a rasterized bitmap. Don't push pixels — address the
screen.

Surface

• render_field_view(class_id, concept, key_hex, title, fields, actions) +
  templates/dispatch/field_view.askama.
• Every field carries data-field-pos = its WideFieldMask position (its
  layout address); every action carries data-action-ordinal = its
  ActionDef address (trap T2 — no inline handler is representable). The
  node key addresses the whole surface (data-key).
• from_value_rows / from_render_rows — direct ClassView-projection bridges
  (lance_graph_contract::class_view::{ValueRow, RenderRow} → FieldView).
• escape="html", no |safe hatch: the XSS class the list/detail kits had
  to fix under codex P1 (feat(ogar-render-askama): T2 — HtmlListView (Redmine spine on ClassView substrate) #83/feat(ogar-render-askama): T3 — HtmlDetailView (Redmine show.html.erb on ClassView) #84) cannot arise on a fieldview.

Tests

5 new tests (addressed render incl. a wide position ≥ 64, XSS regression,
empty-action nav omit, both projection bridges). 61 crate tests green,
clippy clean.

Consumer

Consumed by the a2ui-rs W2 a2ui-server tier (RBAC-project WideFieldMask ∩ role → NodeDelta down + this fieldview render; ActionInvoke up by ordinal;
ogar-encryption sealed transport). Ledger: docs/DISCOVERY-MAP.md
D-A2UI-SCREEN-ADDRESSING (status appended in this PR).

🤖 Generated with Claude Code

https://claude.ai/code/session_01UZmHUePVbVXjHJWoBmABiZ

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Generated by Claude Code

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