Fix HTTPException handling in folder endpoints and install script path

- Add missing `except HTTPException: raise` in create_folder and
  update_folder endpoints to prevent 400 errors being masked as 500s
- Fix install_task_windows.ps1 working directory to point to
  media-server root instead of parent project root

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

media_server/routes/browser.py

@@ -113,6 +113,8 @@ async def create_folder(
             "message": f"Media folder '{request.folder_id}' created successfully",
         }
 
+    except HTTPException:
+        raise
     except ValueError as e:
         raise HTTPException(status_code=400, detail=str(e))
     except Exception as e:
@@ -161,6 +163,8 @@ async def update_folder(
             "message": f"Media folder '{folder_id}' updated successfully",
         }
 
+    except HTTPException:
+        raise
     except ValueError as e:
         raise HTTPException(status_code=400, detail=str(e))
     except Exception as e:

scripts/install_task_windows.ps1

@@ -1,7 +1,7 @@
 Unregister-ScheduledTask -TaskName "MediaServer" -Confirm:$false -ErrorAction SilentlyContinue
 
-# Get the project root directory (two levels up from this script)
-$projectRoot = (Get-Item $PSScriptRoot).Parent.Parent.FullName
+# Get the media-server directory (parent of scripts folder)
+$serverRoot = (Get-Item $PSScriptRoot).Parent.FullName
 
 # Find Python executable
 $pythonPath = (Get-Command python -ErrorAction SilentlyContinue).Source
@@ -10,10 +10,10 @@ if (-not $pythonPath) {
     exit 1
 }
 
-$action = New-ScheduledTaskAction -Execute $pythonPath -Argument "-m media_server.main" -WorkingDirectory $projectRoot
+$action = New-ScheduledTaskAction -Execute $pythonPath -Argument "-m media_server.main" -WorkingDirectory $serverRoot
 $trigger = New-ScheduledTaskTrigger -AtStartup
 $principal = New-ScheduledTaskPrincipal -UserId "$env:USERNAME" -LogonType S4U -RunLevel Highest
 $settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -StartWhenAvailable
 Register-ScheduledTask -TaskName "MediaServer" -Action $action -Trigger $trigger -Principal $principal -Settings $settings -Description "Media Server for Home Assistant"
 
-Write-Host "Scheduled task 'MediaServer' created with working directory: $projectRoot"
+Write-Host "Scheduled task 'MediaServer' created with working directory: $serverRoot"