Add cleanup step to systemd service to stop existing instances

The service now runs `mise run down` before building, making it safe
to start even if Vibora is already running via other methods.

Author: knowsuchagency

DEVELOPMENT.md

@@ -161,12 +161,14 @@ systemctl --user enable vibora-dev
 
 ### First Start
 
-The service automatically builds Vibora on start, so just run:
+The service automatically stops any existing Vibora instance and builds before starting, so just run:
 
 ```bash
 systemctl --user start vibora-dev
 ```
 
+This is safe to run even if Vibora is already running via `mise run up` - the service will stop it first.
+
 ### Manual Operations
 
 ```bash

vibora-dev.service

@@ -8,6 +8,7 @@ WorkingDirectory=%h/projects/vibora
 Environment=VIBORA_DEVELOPER=1
 Environment=NODE_ENV=production
 Environment=PATH=%h/.local/bin:%h/.local/share/mise/shims:/usr/local/bin:/usr/bin:/bin
+ExecStartPre=/bin/bash -c 'cd %h/projects/vibora && mise run down || true'
 ExecStartPre=/bin/bash -c 'cd %h/projects/vibora && mise run build'
 ExecStartPre=/bin/bash -c 'cd %h/projects/vibora && bun run drizzle-kit push'
 ExecStart=/bin/bash -c 'cd %h/projects/vibora && bun server/index.ts'