fix: Add revisionCount and content for document listing

Documents require:
- revisionCount >= 1 (was 0)
- content field with ProseMirror JSON structure

Without these, documents don't appear in collection sidebar.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.3.13] - 2026-01-31
+
+### Fixed
+
+- **Document Listing (Final Fix):** Documents now appear in collection sidebar
+  - Added `revisionCount = 1` (was 0, Outline filters these out)
+  - Added `content` field with minimal ProseMirror JSON structure
+  - Both fields required for documents to appear in listing
+
 ## [1.3.12] - 2026-01-31
 
 ### Fixed