feat: return-to-project redirects from create/edit forms

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

routers/lists.py

@@ -141,6 +141,8 @@ async def create_list(
         return RedirectResponse(url=f"/meetings/{meeting_id}?tab=lists", status_code=303)
     if focus_id and focus_id.strip():
         return RedirectResponse(url=f"/focus/{focus_id}?tab=lists", status_code=303)
+    if project_id and project_id.strip():
+        return RedirectResponse(url=f"/projects/{project_id}?tab=lists", status_code=303)
     return RedirectResponse(url=f"/lists/{new_list['id']}", status_code=303)
 
 
@@ -216,7 +218,7 @@ async def list_detail(list_id: str, request: Request, db: AsyncSession = Depends
 
 
 @router.get("/{list_id}/edit")
-async def edit_form(list_id: str, request: Request, db: AsyncSession = Depends(get_db)):
+async def edit_form(list_id: str, request: Request, from_project: Optional[str] = None, db: AsyncSession = Depends(get_db)):
     repo = BaseRepository("lists", db)
     sidebar = await get_sidebar_data(db)
     item = await repo.get(list_id)
@@ -236,6 +238,7 @@ async def edit_form(list_id: str, request: Request, db: AsyncSession = Depends(g
         "page_title": "Edit List", "active_nav": "lists",
         "item": item,
         "prefill_domain_id": "", "prefill_project_id": "",
+        "from_project": from_project or "",
     })
 
 
@@ -249,6 +252,7 @@ async def update_list(
     list_type: str = Form("checklist"),
     description: Optional[str] = Form(None),
     tags: Optional[str] = Form(None),
+    from_project: Optional[str] = Form(None),
     db: AsyncSession = Depends(get_db),
 ):
     repo = BaseRepository("lists", db)
@@ -264,6 +268,12 @@ async def update_list(
         data["tags"] = None
 
     await repo.update(list_id, data)
+
+    new_project = data.get("project_id")
+    if from_project and from_project.strip():
+        if new_project and new_project != from_project:
+            return RedirectResponse(url=f"/projects/{new_project}?tab=lists", status_code=303)
+        return RedirectResponse(url=f"/projects/{from_project}?tab=lists", status_code=303)
     return RedirectResponse(url=f"/lists/{list_id}", status_code=303)