Single-Textarea Proof-of-Concept — Navy Ship

Testing native editing with irregular stepped mask geometry and protected artwork

CANVAS: Navy Ship (navy_ship_01) — 800 × 1120 (portrait, production)0 chars
Navy Ship Stationery

Live Telemetry

Greeting Focus/Blur
0 / 0
Body Focus/Blur
0 / 0
Signature Focus/Blur
0 / 0
Tab Transitions
0
Total Characters / Paragraphs
0 / 1

Mask-Authoritative Navy Ship Test:

  • Band 1: yStart:10.19%, yEnd:29.07%, width:77.5% (full width upper primary)
  • Band 2: yStart:29.07%, yEnd:43.52%, width:61% (narrowed center)
  • Band 3: yStart:43.52%, yEnd:63.70%, width:50.25% (deep narrowed)
  • Band 4: yStart:63.70%, yEnd:66.60%, width:47.67% (continuation)
  • Verify cursor stability and caret behavior across all four mask bands.
  • Verify protected ship area (red box) is never covered by text.
  • Verify text respects exact mask-derived geometry without modification.
  • OBJECTIVE: Confirm native textareas operate successfully with mask-authoritative production geometry while providing improved editing architecture (4 independent textareas vs complex focus routing).

Telemetry Stream (1)

[01:39:34.369] • Sandbox initialized. Three native textareas (greeting, body, signature) with Navy Ship irregular mask.