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/routers/templates.py

@@ -0,0 +1,63 @@
+from fastapi import APIRouter, Depends, HTTPException, status
+from motor.motor_asyncio import AsyncIOMotorDatabase
+
+from app.dependencies import get_current_user, get_mongo_db_dep
+from app.models.user import User
+from app.schemas.template import TemplateCreate, TemplateResponse, TemplateShareRequest
+from app.services.template_service import create_template, delete_template, list_templates, share_template
+from app.database import get_db
+from app.services.user_service import get_user_by_email_or_username
+from sqlalchemy.orm import Session
+
+router = APIRouter(prefix="/templates", tags=["templates"])
+
+
+@router.get("", response_model=list[TemplateResponse])
+async def get_templates(
+    current_user: User = Depends(get_current_user),
+    db: AsyncIOMotorDatabase = Depends(get_mongo_db_dep),
+) -> list[TemplateResponse]:
+    templates = await list_templates(db, current_user.id)
+    return [TemplateResponse(**template) for template in templates]
+
+
+@router.post("", response_model=TemplateResponse, status_code=status.HTTP_201_CREATED)
+async def post_template(
+    data: TemplateCreate,
+    current_user: User = Depends(get_current_user),
+    db: AsyncIOMotorDatabase = Depends(get_mongo_db_dep),
+) -> TemplateResponse:
+    template = await create_template(db, current_user.id, data.model_dump())
+    return TemplateResponse(**template)
+
+
+@router.delete("/{template_id}", status_code=status.HTTP_204_NO_CONTENT)
+async def remove_template(
+    template_id: str,
+    current_user: User = Depends(get_current_user),
+    db: AsyncIOMotorDatabase = Depends(get_mongo_db_dep),
+) -> None:
+    if not await delete_template(db, template_id, current_user.id):
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found")
+
+
+@router.post("/{template_id}/share", response_model=TemplateResponse)
+async def add_template_member(
+    template_id: str,
+    data: TemplateShareRequest,
+    current_user: User = Depends(get_current_user),
+    db: AsyncIOMotorDatabase = Depends(get_mongo_db_dep),
+    sql: Session = Depends(get_db),
+) -> TemplateResponse:
+    user = get_user_by_email_or_username(sql, data.email_or_username.strip().lower())
+    if user is None or user.id == current_user.id:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+    template = await share_template(
+        db,
+        template_id,
+        current_user.id,
+        {"user_id": user.id, "name": user.full_name or user.username, "email": user.email},
+    )
+    if template is None:
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Only the owner can share this template")
+    return TemplateResponse(**template)