fix: correct inspector package name in Dockerfiles and add .dockerignore (#50)

* chore: remove inspect.sandboxagent.dev in favor of /ui/

* chore: add 404 page

* fix: correct inspector package name in Dockerfiles and add .dockerignore

- Change @anthropic-ai/sdk-inspector to @sandbox-agent/inspector in all Dockerfiles
- Add .dockerignore to exclude target/, node_modules/, etc from Docker context

The wrong package name caused pnpm install --filter to match nothing, so the
inspector frontend was never built, resulting in binaries without the /ui/ endpoint.

* chore: cargo fmt

* chore(release): update version to 0.1.4-rc.7

server/packages/agent-management/src/testing.rs

@@ -285,10 +285,7 @@ fn handle_health_response(
     })
 }
 
-fn run_blocking_check<F>(
-    provider: &str,
-    check: F,
-) -> Result<(), TestAgentConfigError>
+fn run_blocking_check<F>(provider: &str, check: F) -> Result<(), TestAgentConfigError>
 where
     F: FnOnce() -> Result<(), TestAgentConfigError> + Send + 'static,
 {
@@ -301,7 +298,12 @@ where
 }
 
 fn detect_system_agents() -> Vec<AgentId> {
-    let candidates = [AgentId::Claude, AgentId::Codex, AgentId::Opencode, AgentId::Amp];
+    let candidates = [
+        AgentId::Claude,
+        AgentId::Codex,
+        AgentId::Opencode,
+        AgentId::Amp,
+    ];
     let install_dir = default_install_dir();
     candidates
         .into_iter()