feat(onboarding): PLC/blob file upload (multipart) + single-file ingest fix (#163)

compliance-dashboard/src/infrastructure/onboarding.rs

@@ -130,6 +130,37 @@ pub async fn create_target(
         .map_err(|e| ServerFnError::new(e.to_string()))
 }
 
+/// Upload a file artifact (PLC project, firmware image, source archive, mobile
+/// package) to a target — proxied to the agent as multipart.
+#[server]
+pub async fn upload_target_artifact(
+    id: String,
+    kind: String,
+    plc_format: Option<String>,
+    filename: String,
+    bytes: Vec<u8>,
+) -> Result<TargetResponse, ServerFnError> {
+    let mut form = reqwest::multipart::Form::new().text("kind", kind).part(
+        "file",
+        reqwest::multipart::Part::bytes(bytes).file_name(filename),
+    );
+    if let Some(pf) = plc_format {
+        form = form.text("plc_format", pf);
+    }
+    let resp = super::agent_client::agent_request(
+        reqwest::Method::POST,
+        &format!("/api/v1/targets/{id}/artifacts/upload"),
+    )
+    .await?
+    .multipart(form)
+    .send()
+    .await
+    .map_err(|e| ServerFnError::new(e.to_string()))?;
+    resp.json()
+        .await
+        .map_err(|e| ServerFnError::new(e.to_string()))
+}
+
 /// Update a target's name / type / artifacts (dashboard editor).
 #[server]
 pub async fn update_target(