docs: acknowledge Pane-A in core docs and rule files

[hyperpolymath]

Summary

Closes #20.

src/View.res renders four panes (Pane-A, Pane-L, Pane-N, Pane-W) and the README table at README.adoc:99-110 enumerates all four, but several adjacent docs and rule files still framed the layout as three panes (no Pane-A). This PR reconciles the most direct "three panel(s)/pane(s)" claims with the implementation, including the user-visible Help panel.

Changes

Doc + rule-file drift (commit 1)

• README.adoc:92 — section heading "Three-Pane Parallel Layout" → "Four-Pane Parallel Layout".
• .claude/CLAUDE.md:51 — "106 panels across three panes …" → four panes, with Panel-A added and a one-line note on the Binary Star core (L + N orbiting W) plus Panel-A's ambient role.
• .machine_readable/6a2/META.a2ml — Binary Star decision (line 24) now enumerates four panels (three orbital + one ambient); the three-pane-layout key (line 108) is renamed four-pane-layout, with position called out as design intuition rather than architectural fact.
• .machine_readable/6a2/ECOSYSTEM.a2ml:76-77 — VeriSimDB mapping reframed as a mapping to the L/N/W panes of PanLL's four-pane layout (Panel-A is ambient substrate, not part of the VCL-DT mapping).
• Six rule files — binary-star Decision (line 161) extended to four panel types with Panel-A added; the Why line distinguishes the Binary Star orbital core (L + N around W) from Panel-A's ambient role:
  • .cursorrules
  • .clinerules
  • .github/copilot-instructions.md
  • .junie/guidelines.md
  • .q/rules/coordination.md
  • .claude/CLAUDE.generated.md

User-visible help content (commit 2)

• src/core/HelpContent.res:
  • "welcome" entry body — unified three-panel workspace → unified four-panel workspace (Panel-A ambient substrate, Panel-L logic/symbolic, Panel-N neural, Panel-W world/barycentre).
  • "three-panel-layout" entry — id and title renamed to four-panel-layout; body rewritten to introduce Panel-A as ambient substrate, clarify Panel-L's letter as "Logic" rather than "left", and replace the (left)/(centre)/(right) position framing with flow-and-perspective framing per the architectural model.
  • Keywords extended — keep three-panel for backward search, add four-panel, panel-a, ambient, binary star.

The renamed three-panel-layout help-anchor id has no inbound references elsewhere in the repo (verified via grep) — safe rename.

Out of scope (deliberately)

• Rule file lines 101 and 196 — these are descriptions of the Binary Star architecture, which is genuinely a three-pane metaphor (L + N orbiting W). Correct as written.
• Rule file lines 103 and 186 — also Binary Star claims, accurate when read as referring to Binary Star types specifically. Reframing them so they remain accurate in the presence of Panel-A requires more nuance than this PR aims for; left for a follow-up.
• README.adoc:287 (v0.2.0 component enumeration) — snapshot of v0.2.0 status; PaneA may not have been functional at that release, so left unmodified.

Test plan

• No code changes; doc-only.
• three-panel-layout help-anchor id has no inbound references elsewhere in the repo.
• three-pane-layout key (renamed in META.a2ml) has no other consumers across the hyperpolymath org (org-wide code search returns only the file itself).
• Help content rebuild reflects the new "Understanding the Four-Panel Layout" entry (run npx rescript build + the help indexer if there is one).

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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