Proof E — the shared view engine, same outline as Proof D

Phase 1 of ecco-notepads-build. Same 10-item, 4-level outline as ecco-treeview-proof.md, but View 6/7 are now two-line calls to the shared engine at Focus/scripts/ecco-view.js instead of ~25 lines of inlined JS each. The tree-walking logic inside that engine is unchanged from the proof — only wrapped in a function and looped per dv.pages(source) page, so it can run over a folder of notepads later, not just one file.

Headless check already passed (node Focus/scripts/ecco-view.test.mjs — View 6, View 7, and a showAncestors:false case, all PASS) — that proves the algorithm. This file is the one thing the harness can’t check: does dv.pages() + dv.view() actually reach these items and render the same tree Obsidian rendered for Proof D. Obsidian CLI wasn’t registered yet (Phase 0), so this needs Talbot’s eyes.

The outline — identical to Proof D

• Chilton partnership [abc:: A] [status:: WIP] [focus:: today]
  • Draft the follow-up email [abc:: A] [status:: WIP] [focus:: today]
    • Confirm the send date with Talbot [abc:: A] [status:: waiting] [focus:: today]
      • Check his Friday calendar block [abc:: B] [status:: todo] [focus:: thisWeek]
    • Attach deck v2 [abc:: B] [status:: todo] [focus:: thisWeek]
  • Agree the revenue split [abc:: A] [status:: todo] [focus:: thisWeek]
• Rate scanner — daily ops check [abc:: A] [status:: recurring] [focus:: today]
• Refresh Filter+Focus (4.5 months stale) [abc:: B] [status:: todo] [focus:: thisWeek]
• Buy new label printer [abc:: C] [status:: todo] [action:: buy] [focus:: someday]

View 6 — “Today only”, filtered and nested — now a two-line call

dv.view("Focus/scripts/ecco-view", {
    field: "focus", value: "today",
    source: '"Core/Processes/Projects/Focus/proofs/ecco-view-engine-proof"'
});

Expected — identical to Proof D’s View 6:

- Chilton partnership
    - Draft the follow-up email
        - Confirm the send date with Talbot
- Rate scanner — daily ops check

View 7 — “Waiting”, one deep match, ancestors italic

dv.view("Focus/scripts/ecco-view", {
    field: "status", value: "waiting",
    source: '"Core/Processes/Projects/Focus/proofs/ecco-view-engine-proof"'
});

Expected — identical to Proof D’s View 7:

- *Chilton partnership*
    - *Draft the follow-up email*
        - Confirm the send date with Talbot

Render check for Talbot

1. Do View 6 and View 7 above render exactly what Proof D rendered (same four items / same single-match-with-ancestors)?
2. If either shows a JavaScript error instead of the list, paste the error — the algorithm is proven headlessly; a failure here is dv.view() / dv.pages() API surface, not the tree logic.