diff --git a/backend/run.py b/backend/run.py
index 655973b..4753965 100644
--- a/backend/run.py
+++ b/backend/run.py
@@ -1,4 +1,4 @@
 import uvicorn
 
 if __name__ == "__main__":
-    uvicorn.run("app.main:app", host="127.0.0.1", port=8000, reload=False)
+    uvicorn.run("app.main:app", host="127.0.0.1", port=8000, reload=True)
diff --git a/frontend/js/app.js b/frontend/js/app.js
index b6cd3ed..b6b68c8 100644
--- a/frontend/js/app.js
+++ b/frontend/js/app.js
@@ -10,6 +10,7 @@ class WiringApp {
     this._preDrag = null;          // snapshot captured at dragstart for undo
     this._octopartReady = null;    // null=unknown, true/false after status check
     this._bundles = [];            // wire bundles for current diagram
+    this._updatingBundleDropdown = false;
 
     this.canvas = new DiagramCanvas("canvas-container", {
       onDeviceSelected:   (d)                      => this._showDeviceProps(d),
@@ -62,11 +63,26 @@ class WiringApp {
     this._savedTimer = setTimeout(() => {
       const el = document.getElementById("saved-indicator");
       if (!el) return;
+      el.textContent = "✓ Saved";
+      el.style.color = "";
       el.classList.add("show");
       setTimeout(() => el.classList.remove("show"), 1400);
     }, 600);
   }
 
+  _flashError() {
+    clearTimeout(this._savedTimer);
+    const el = document.getElementById("saved-indicator");
+    if (!el) return;
+    el.textContent = "✗ Save failed";
+    el.style.color = "#e06c6c";
+    el.classList.add("show");
+    this._savedTimer = setTimeout(() => {
+      el.classList.remove("show");
+      el.style.color = "";
+    }, 3000);
+  }
+
   // ── Undo ──────────────────────────────────────────────────────────────────────
 
   _pushUndo(fn) {
@@ -599,6 +615,7 @@ class WiringApp {
     });
 
     document.getElementById("wire-bundle-select")?.addEventListener("change", (e) => {
+      if (this._updatingBundleDropdown) return;
       const bundleId = e.target.value ? parseInt(e.target.value) : null;
       this._patchWire({ bundle_id: bundleId }, true);
       this._refreshBundleEditPanel(bundleId);
@@ -708,8 +725,13 @@ class WiringApp {
       Object.assign(w, data);
       if (redraw) this.canvas.updateWire(w);
     }
-    await api.wires.update(id, data).catch(e => console.error("Wire save failed:", e));
-    this._flashSaved();
+    try {
+      await api.wires.update(id, data);
+      this._flashSaved();
+    } catch (e) {
+      console.error("Wire save failed:", e);
+      this._flashError();
+    }
   }
 
   // ── Diagram management ────────────────────────────────────────────────────────
@@ -1338,6 +1360,7 @@ class WiringApp {
   _refreshBundleDropdown(selectedId) {
     const sel = document.getElementById("wire-bundle-select");
     if (!sel) return;
+    this._updatingBundleDropdown = true;
     sel.innerHTML = '<option value="">— none —</option>';
     this._bundles.forEach(b => {
       const opt = document.createElement("option");
@@ -1346,6 +1369,7 @@ class WiringApp {
       if (b.id === selectedId) opt.selected = true;
       sel.appendChild(opt);
     });
+    this._updatingBundleDropdown = false;
   }
 
   _refreshBundleEditPanel(bundleId) {