5ac08b8f4b
Implements the 3 HIGH fixes agent_qa found via the RALPH test cycle (analysis theirs, implementation here), fixtures-first. - T2E-1 [converter]: a multi-paragraph callout collapsed to one paragraph on round-trip. markdown-converter `case "callout"` now joins block children with "\n>\n" (a blank ">" separator), byte-identical to the blockquote serializer, so two paragraphs survive re-import. Fixture 12-callout-multiblock; two existing tests updated (their old expectations encoded the collapse bug). - T6-listnest [converter]: a callout/blockquote nested in a list item corrupted on round-trip (callout type lost, `[!type]` leaked into text — confirmed DB corruption). Add bridgeNestedCallouts: a post-marked, nesting-agnostic JSDOM pass that reconstructs callouts from `[!type]`-opening blockquotes at ANY depth (the indented ` > [!type]` form the column-0-anchored preprocessor misses), emitting the same callout div as the top-level path (disjoint inputs, no double-processing). Strict `^[!type]` guard, so a real blockquote — or one with `[!` mid-line — is NOT converted. Fixture 13-callout-in-list + a no-lead control + false-positive controls (proven non-vacuous). - D-P3-1 [git-sync]: a "ghost" file (a tracked id that was never a page) was silently absence-deleted on pull-reconcile -> data loss. Add GitSyncClient.pageIdsExist (datasource: workspace-scoped SELECT over any space incl. trashed/moved, non-UUID ids filtered first); cycle.ts computes the candidate-delete set and passes existing ids as `deletableIds` into planReconciliation, which now absence-deletes ONLY real page rows — a ghost is preserved. A cycle-level e2e test proves the ghost survives runCycle end-to-end. Suites green: prosemirror-markdown 687, git-sync 272 (no type errors), datasource 36, orchestrator 26; both packages tsc clean. Scope: the 3 fixes + tests/fixtures only, no develop re-merge. T4E-esc (LOW escaping) left for the maintainer, per agent_qa. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>