Builtin OfficeCLI skills still instruct double page breaks

[CleverC2200]

Problem

The builtin OfficeCLI DOCX skills still instruct agents to apply both an explicit pagebreak and pageBreakBefore=true at the same logical boundary. In Word and WPS this can produce an extra blank page.

OfficeCLI tracked and fixed this behavior in iOfficeAI/OfficeCLI#191 and iOfficeAI/OfficeCLI#193, but the corresponding builtin assets in AionCore have not picked up that fix.

Current behavior

Verified on current AionCore main (6e04e741c42425072a8296fdacd95e5d1261d4d7) and release v0.1.65:

• crates/aionui-app/assets/builtin-skills/officecli-docx/SKILL.md says Apply BOTH and provides a two-mechanism example.
• crates/aionui-app/assets/builtin-skills/officecli-academic-paper/SKILL.md inherits the stale belt-and-suspenders rule.
• The DOCX skill also retains the static TOC fallback removed by the same upstream fix.

A deterministic check is:

rg -n "Apply BOTH|belt-and-suspenders|Static TOC fallback" \
  crates/aionui-app/assets/builtin-skills/officecli-docx/SKILL.md \
  crates/aionui-app/assets/builtin-skills/officecli-academic-paper/SKILL.md

Expected behavior

Mirror the focused changes from iOfficeAI/OfficeCLI#193:

• use exactly one page-break mechanism per logical boundary;
• remove examples that set pageBreakBefore on a newly inserted page-break paragraph;
• retain a live TOC with updateFields=true rather than guessed static page numbers;
• update the academic-paper references to the corrected base rules.

Scope

Builtin Skill documentation only. No Rust behavior or user-visible UI changes.