feat: implement comments and activity panel in workspace

- Added CommentsPanel component for managing comments on documents.
- Integrated comment creation, deletion, and resolution functionalities.
- Implemented activity tracking for document interactions.
- Enhanced SketchPage with editing and saving capabilities.
- Introduced template management API endpoints for creating, sharing, and deleting templates.
- Added runtime validation report for frontend and backend.
- Created GettingStartedPanel for user onboarding with template options.
- Implemented Playwright E2E tests for accessibility and export functionality.

backend/app/schemas/document.py

@@ -21,12 +21,15 @@ class DocumentCreate(BaseModel):
     content: dict[str, Any] = Field(default_factory=dict)
     template_id: str | None = None
     stead_id: str | None = None
+    parent_page_id: str | None = None
 
 
 class DocumentUpdate(BaseModel):
     title: str | None = None
     content: dict[str, Any] | None = None
     starred: bool | None = None
+    stead_id: str | None = None
+    parent_page_id: str | None = None
 
 
 class ShareRequest(BaseModel):
@@ -40,6 +43,7 @@ class DocumentResponse(BaseModel):
     title: str
     template_id: str | None = None
     stead_id: str | None = None
+    parent_page_id: str | None = None
     content: dict[str, Any]
     created_by: str
     created_at: datetime
@@ -49,3 +53,13 @@ class DocumentResponse(BaseModel):
     owner_id: int | None = None
     visibility: Visibility = "private"
     members: list[DocumentMember] = Field(default_factory=list)
+
+
+class DocumentVersionResponse(BaseModel):
+    id: str
+    document_id: str
+    title: str
+    content: dict[str, Any]
+    created_by: str
+    created_at: datetime
+    reason: str