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

When creating or editing items from a project detail tab, users now
return to that project's tab instead of the entity's own page.
Edit links pass from_project param; forms include hidden field.
Reassigning to a different project redirects to the new project.
Decisions/meetings create from project context inserts junction rows.
File uploads from project context redirect back to project files tab.

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

routers/meetings.py

@@ -51,7 +51,7 @@ async def list_meetings(
 
 
 @router.get("/create")
-async def create_form(request: Request, db: AsyncSession = Depends(get_db)):
+async def create_form(request: Request, project_id: Optional[str] = None, db: AsyncSession = Depends(get_db)):
     sidebar = await get_sidebar_data(db)
     # Get contacts for attendee selection
     contacts_repo = BaseRepository("contacts", db)
@@ -68,6 +68,7 @@ async def create_form(request: Request, db: AsyncSession = Depends(get_db)):
         "contacts": contacts, "parent_meetings": parent_meetings,
         "page_title": "New Meeting", "active_nav": "meetings",
         "item": None,
+        "prefill_project_id": project_id or "",
     })
 
 
@@ -84,6 +85,7 @@ async def create_meeting(
     parent_id: Optional[str] = Form(None),
     agenda: Optional[str] = Form(None),
     tags: Optional[str] = Form(None),
+    project_id: Optional[str] = Form(None),
     db: AsyncSession = Depends(get_db),
 ):
     repo = BaseRepository("meetings", db)
@@ -103,6 +105,14 @@ async def create_meeting(
         data["tags"] = [t.strip() for t in tags.split(",") if t.strip()]
 
     meeting = await repo.create(data)
+
+    # Link to project if created from project context
+    if project_id and project_id.strip():
+        await db.execute(text("""
+            INSERT INTO project_meetings (project_id, meeting_id)
+            VALUES (:pid, :mid) ON CONFLICT DO NOTHING
+        """), {"pid": project_id, "mid": meeting["id"]})
+        return RedirectResponse(url=f"/projects/{project_id}?tab=meetings", status_code=303)
     return RedirectResponse(url=f"/meetings/{meeting['id']}", status_code=303)
 
 
@@ -253,7 +263,7 @@ async def meeting_detail(
 
 
 @router.get("/{meeting_id}/edit")
-async def edit_form(meeting_id: str, request: Request, db: AsyncSession = Depends(get_db)):
+async def edit_form(meeting_id: str, request: Request, from_project: Optional[str] = None, db: AsyncSession = Depends(get_db)):
     repo = BaseRepository("meetings", db)
     sidebar = await get_sidebar_data(db)
     item = await repo.get(meeting_id)
@@ -273,6 +283,7 @@ async def edit_form(meeting_id: str, request: Request, db: AsyncSession = Depend
         "contacts": contacts, "parent_meetings": parent_meetings,
         "page_title": "Edit Meeting", "active_nav": "meetings",
         "item": item,
+        "from_project": from_project or "",
     })
 
 
@@ -291,6 +302,7 @@ async def update_meeting(
     transcript: Optional[str] = Form(None),
     notes_body: Optional[str] = Form(None),
     tags: Optional[str] = Form(None),
+    from_project: Optional[str] = Form(None),
     db: AsyncSession = Depends(get_db),
 ):
     repo = BaseRepository("meetings", db)
@@ -315,6 +327,9 @@ async def update_meeting(
         data["tags"] = None
 
     await repo.update(meeting_id, data)
+
+    if from_project and from_project.strip():
+        return RedirectResponse(url=f"/projects/{from_project}?tab=meetings", status_code=303)
     return RedirectResponse(url=f"/meetings/{meeting_id}", status_code=303)