[feat-022] Force LLM citations on lists + prose-page-ref fallback chips

Two fixes for the "Parties" column case the user found, where the
LLM described both parties but emitted no [[page:N||quote:...]]
markers, leaving the Citations chip row empty even though "Page 1"
was clearly stated in prose.

Backend prompts (queryGemini + queryGeminiAllColumns):
- Lists/bulleted summaries are explicitly NOT exempt from citation
  rules. The prompt now spells out "if the summary lists three
  parties, emit three citation markers - one per party" with a
  worked example: "ACME CORP [[page:1||quote:ACME CORP]] and
  BETA INC [[page:1||quote:BETA INC]]".
- Tightened the rule from "factual claim" to "every distinct fact
  (every name, date, number, party, clause, defined term, or
  substantive statement)" so the model can't lawyer its way out of
  citing a list.
- Explicit ban on prose page references like "(Page 5)" or
  "see Section 3" inside the summary - must use the marker format
  so the UI can render clickable chips.
- Reasoning may also include [[page:N||quote:...]] citations, and
  the prompt now encourages it.
- "keywords" guidance picks up "party names" as a preferred kind.

Frontend safety net for legacy / occasionally-still-lazy outputs:
- citation-utils gains extractProsePageRefs() - scans free text for
  "Page N" / "page N" / "p. N" / "pp. N" patterns and emits
  quoteless ParsedCitation entries, deduped against any structured
  citations on the same page.
- TRDocDetailView's allCitations now appends those prose refs after
  the structured ones, so the Citations chip row gets at least the
  page-jump affordance even when the model skipped its markers. The
  existing [N]-numbered superscripts in the cell text stay stable
  (only structured citations get numbered).

Net effect: a re-run of the Parties column should now produce per-party
[[page:N||quote:...]] markers and four real Citations chips. For cells
already in the DB (without re-running) the prose fallback at least
gives a clickable "Page 1" jump.

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