feat(t3): background machine is dell-dev, the vm that runs t3 after the dell move

t3code.toml

@@ -1,5 +1,6 @@
 # Машины с T3 Code и allowlist проектов на каждой. Токены - в .env (T3_*_TOKEN).
-# Имена - MagicDNS tailnet'а; `dell` для контейнера прописан через T3_DELL_ADDR.
+# Имена - MagicDNS tailnet'а; `dell-dev` (дев-VM на делле) для контейнера
+# прописан через T3_DELL_DEV_ADDR.
 
 [machines.mac]
 url = "http://mac:3773"
@@ -8,9 +9,9 @@ projects = ["*"]
 model = "claudeAgent/claude-opus-5-5"
 options = { effort = "high", contextWindow = "1m" }
 
-[machines.dell]
-url = "http://dell:3773"
-token_env = "T3_DELL_TOKEN"
+[machines.dell-dev]
+url = "http://dell-dev:3773"
+token_env = "T3_DELL_DEV_TOKEN"
 projects = ["*"]
 model = "claudeAgent/claude-opus-5-5"
 options = { effort = "high", contextWindow = "1m" }