feat(onboarding): scan-trigger endpoint + wizard Run-Scan button (#153)

compliance-dashboard/src/infrastructure/onboarding.rs

@@ -105,3 +105,19 @@ pub async fn fetch_applicable_scans(id: String) -> Result<ApplicableScansRespons
         .await
         .map_err(|e| ServerFnError::new(e.to_string()))
 }
+
+/// Trigger a scan for a target.
+#[server]
+pub async fn trigger_target_scan(id: String) -> Result<serde_json::Value, ServerFnError> {
+    let resp = super::agent_client::agent_request(
+        reqwest::Method::POST,
+        &format!("/api/v1/targets/{id}/scan"),
+    )
+    .await?
+    .send()
+    .await
+    .map_err(|e| ServerFnError::new(e.to_string()))?;
+    resp.json()
+        .await
+        .map_err(|e| ServerFnError::new(e.to_string()))
+}