fix(citation-assembly): cascading-replacement, inline-with-colon, and
                        hyphen-in-citation-id bugs
fix(css): TOC heading no longer stranded by page-break-inside: avoid
            on a too-tall nested <ol>
move(brand): Avalanche brand bundle → io/avalanche/ firm-private,
              symlinked back from templates/brand-configs/
new(skill): context-v/skills/manage-memo-citations/SKILL.md
new(skill): context-v/skills/adhoc-edits-workflow/SKILL.md
new(script): scripts/fix_citation_positioning.py
bump(submodule): io/avalanche → ChromaDB v0.0.11

Three reproducible citation-assembly bugs found during the ChromaDB
v0.0.11 build. Each had a single-line root cause and a single-line
fix; the trick was teasing them apart.

* src/agents/citation_assembly.py — cascading-replacement bug. The
  prior renumber_inline_citations used a sequential str.replace loop:
  [^notes1] → [^1] could then be caught by the next rule [^1] → [^3],
  collapsing many distinct citations to a single number. Replaced
  with a single-pass callable-based re.sub so each marker is visited
  exactly once.

* src/agents/citation_assembly.py — inline-citation-with-colon bug.
  The prior `(?!:)` negative lookahead excluded end-of-sentence
  inline citations like "claims [^X]:" as if they were definitions,
  leaving them as orphan markers. The replacer now distinguishes
  definitions structurally — must be `[^X]:` at the start of a line
  followed by a space — from inline citations.

* src/agents/citation_assembly.py — hyphen-in-citation-id bug. The
  citation ID regex was `[a-zA-Z0-9_]+`, which silently dropped
  semantic IDs like `[^github-2018]`, `[^cursor-2026]`,
  `[^mongodb-fy26]`. Widened to `[a-zA-Z0-9_-]+` across all five
  places the pattern appears.

* templates/base-style.css — WeasyPrint was stranding the "Table of
  Contents" heading on a page by itself with the list pushed to the
  next page. Root cause: the markdown TOC is a nested <ol>, so the
  outermost <li> (containing every subsection underneath) is taller
  than a full page, and `page-break-inside: avoid` on `li` prevented
  it from breaking. Added a more-specific override
  (`#table-of-contents + ol ... { page-break-inside: auto }`) so the
  TOC list flows immediately after the heading.

* templates/brand-configs/brand-avalanche-config.yaml is now a
  symlink to ../../io/avalanche/configs/brand-avalanche-config.yaml.
  Matches the dark-matter / hypernova convention. Canonical trademark
  assets live in io/avalanche/configs/trademarks/ and the brand
  config references them by local path; the duplicates in
  templates/trademarks/trademark__Avalanche--*.{png,webp} are removed.

* context-v/skills/manage-memo-citations/SKILL.md — codifies the
  "foundational citations live in 1-research/, not in section files"
  rule, with a theme→file mapping table, the semantic-ID-over-numeric
  convention, and a recovery playbook for when orphans appear.

* context-v/skills/adhoc-edits-workflow/SKILL.md — codifies the
  four-step ad-hoc edit pipeline (research → sections → assemble →
  export), with six anti-patterns captured from this session
  (editing the final draft directly, adding prose before the citation
  exists, hand-typed numeric IDs, skipping assembly before export).

* scripts/fix_citation_positioning.py — applies two house-style
  rules: inline citations belong AFTER terminal punctuation, not
  before; and same-citation-id repeats in one paragraph collapse to
  a single marker at the end of the paragraph. Obsidian-compliant
  single-space-before-bracket throughout.

Also included:
* io/avalanche submodule pointer advanced to the ChromaDB v0.0.11 commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>