feat(embedding,vision): candle embeddings with offline fallback, on-demand clipboard vision capture, and concurrency audit

stub/tests/negative_scenarios.rs

@@ -15,13 +15,20 @@ fn get_stub_exe() -> std::path::PathBuf {
     get_target_dir().join(format!("mcp-memory-stub{}", std::env::consts::EXE_SUFFIX))
 }
 
+fn ensure_stub_built() {
+    let stub_path = get_stub_exe();
+    if !stub_path.exists() {
+        let _ = std::process::Command::new("cargo")
+            .arg("build")
+            .arg("--bin")
+            .arg("mcp-memory-stub")
+            .status();
+    }
+}
+
 #[tokio::test]
 async fn test_stub_connection_refused() {
-    let _ = std::process::Command::new("cargo")
-        .arg("build")
-        .arg("--bin")
-        .arg("mcp-memory-stub")
-        .status();
+    ensure_stub_built();
 
     let target = "http://127.0.0.1:49999";
 
@@ -44,13 +51,9 @@ async fn test_stub_connection_refused() {
 
 #[tokio::test]
 async fn test_stub_handles_eof_cleanly() {
-    let _ = std::process::Command::new("cargo")
-        .arg("build")
-        .arg("--bin")
-        .arg("mcp-memory-stub")
-        .status();
+    ensure_stub_built();
 
-    let target = "http://127.0.0.1:49998";
+    let target = "http://127.0.0.1:4998";
 
     let mut child = Command::new(get_stub_exe())
         .arg("--target")
@@ -76,11 +79,7 @@ async fn test_stub_handles_eof_cleanly() {
 
 #[tokio::test]
 async fn test_stub_sse_fallback_failure() {
-    let _ = std::process::Command::new("cargo")
-        .arg("build")
-        .arg("--bin")
-        .arg("mcp-memory-stub")
-        .status();
+    ensure_stub_built();
 
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
     let local_addr = listener.local_addr().unwrap();