fix(capture): align masked tape calibration with #99

.planning/milestones/v0.5/M4/goals.md

@@ -1,4 +1,4 @@
-# M4 — Goals (DRAFT — not accepted)
+# M4 — Goals
 
 Role: goals for Milestone 4. Cites requirement IDs and Gitea issue numbers; defines none
 new until accepted. Source of truth for scope will be `docs/MILESTONES.md` (M4 ID subset)
@@ -22,8 +22,9 @@ Raw runner evidence recorded; Ty owns gate exit (QUALITY-25/30).
 1. **Stabilize + polish the M3 experience (A) — includes the #99 tape-line calibration (B).**
    - **Tape-line calibration (#99):** replace the axis-rectangle calibration with a draggable
      tape-line (black line + two rifle-scope end ticks). Declared length = distance between
-     ticks (owner-declared); `maskSpanAlong` demoted to an optional sanity check. New
-     requirement row(s); supersedes the as-built length model in CAPTURE-60/75. The `m4`
+     ticks (owner-declared); scale = tick-pixel distance / declared length, no
+     `maskSpanAlong` check. New
+     requirement row(s); supersedes the projected-span length model in CAPTURE-60/75. The `m4`
      branch already carries `crop_fill` + `TapePrototype.svelte` (`?tape-prototype`); M4
      promotes it from prototype to shipped.
    - **UX polish:** photo-picker look/feel (#91), photo filenames on submit (#92), capture
@@ -100,8 +101,8 @@ Raw runner evidence recorded; Ty owns gate exit (QUALITY-25/30).
 
 ## Requirements delta (draft — rows written at execution, after acceptance)
 
-- **New rows (draft):** tape-line calibration behavior (overlay, draggable ticks,
-  owner-declared length, sanity check). ~1–3 rows under CAPTURE.
+- **New rows:** tape-line calibration behavior (overlay, draggable ticks,
+  owner-declared length, tick-distance scale). ~1–3 rows under CAPTURE.
 - **New rows (draft):** the **manual taxonomy selection UI** — owner picks species / wood
   categories (primary + secondary) / edge / figure / grade / moisture / tags by hand,
   thumb-first, with no inference pre-fill. ~1 row under METADATA or REVIEW.
@@ -126,7 +127,7 @@ Raw runner evidence recorded; Ty owns gate exit (QUALITY-25/30).
 
 1. **Tape-line calibration + M3 polish ship together (Goal 1):** the `?tape-prototype`
    sandbox is replaced by the shipped calibration path (owner drags both ticks; declared
-   length = tick distance; as-built length model no longer the source of truth), and the
+   length = tick distance; no `maskSpanAlong` check), and the
    M3 polish issues (#91–#100, excluding #96 which drops with Call 1) are closed with
    passing tests and raw runner evidence.
 2. **The review flow is human-driven, thumb-first, and Call 1-free:** the owner can pick
@@ -156,11 +157,11 @@ Raw runner evidence recorded; Ty owns gate exit (QUALITY-25/30).
 
 ## Task-level decisions (settled during the sprint, not at planning)
 
-These are implementation details the task breakdown and wireframe settle — not plan-level:
-the exact thumb-first interaction model (wizard vs single-scroll, chips vs pickers), which
-of #91–#100 are M4-must vs nice, whether #99 touches the photos-ready lineup (CAPTURE-130),
-and the exit-walk shape (single slab vs QUALITY-110 pair; test-inference is text-only now
-that Call 1 is out).
+The only plan-level open item is the exact thumb-first interaction model
+(wizard vs single-scroll, chips vs pickers) — settled by the wireframe.
+Settled at kickoff (not reopened here): full #91–#100 polish wave (only #96 drops
+with Call 1); #99 confined to the calibration step (CAPTURE-130 lineup untouched);
+exit walk is a single slab carrying multiple photos.
 
 ## Task breakdown detail bar
 

.planning/milestones/v0.5/M4/tasks.md

@@ -34,11 +34,13 @@ exit (QUALITY-30); agents record raw evidence, never declare green.
   sandbox on the `m4` branch; `docs/design/issue-99-tape-line-overlay.html` (approved
   wireframe); `frontend/src/png/crop.ts` (projection logic).
 - **Work:** promote the prototype to the shipped calibration path (owner drags both
-  ticks), adopt the as-built length model (maskSpanAlong projection), delete the
+  ticks to the actual tape start/end; scale = tick-pixel distance / owner-declared
+  length — no `maskSpanAlong` check), delete the
   sandbox + query-param gating, keep `crop_fill` (already landed in 818874e).
   **Scope (Ty confirmed):** confined to the calibration step — the photos-ready
   lineup (CAPTURE-130) stays as-is; #99 does not touch it.
-- **Verification:** unit tests in `frontend/src/png/*` (tape geometry), `tsc --noEmit`,
+- **Verification:** unit tests in `frontend/src/png/*` (tape geometry + tick-distance
+  scale math in photo px under pan/zoom/rotate), `tsc --noEmit`,
   manual calibration on one slab at 375px.
 - **Sequence:** parallel with T3–T5; no dependency on T1.
 - **Stop:** prototype shipped, `?tape-prototype` removed, tests green.
@@ -76,8 +78,8 @@ exit (QUALITY-30); agents record raw evidence, never declare green.
   wireframe, 2026-09-24) for the visual language + the interaction model.
 - **Work:** 2–3 HTML variants of the thumb-first review flow. Standing paradigms:
   *no tap-bubble chip clouds for long lists → collapsible searchable checklist*;
-  leftmost-kept-is-primary for wood (primary + optional secondaries); AI-assist
-  labeled as "suggested, confirm"; every metadata requirement present (primary
+  leftmost-kept-is-primary for wood (primary + optional secondaries);
+  no AI-assist surface (Call 1 decommissioned); every metadata requirement present (primary
   wood-category required, secondaries optional).
 - **Verification:** Ty reviews the served variants and accepts one (375/768/1280).
 - **Sequence:** before T5/T6. **Stop:** Ty accepts a variant.