Restore document center operational shell

AgentCompany-Rust/prd.json

@@ -262,8 +262,8 @@
         "cargo test --workspace passes"
       ],
       "priority": 19,
-      "passes": false,
-      "notes": "Opened after strict current-directory-only source audit."
+      "passes": true,
+      "notes": "Passed: Document Center now restores a source-like shell with section header, prose list, work-product list, and a dedicated editor/inspector column while preserving the existing native save path."
     },
     {
       "id": "US-020",