Fix

Author: deployor

editor-backend/app/services/arduino_cli.py

@@ -97,14 +97,36 @@ def _ensure_board_urls(self):
                         capture_output=True, text=True
                     )
 
-            # Refresh index so new cores are discoverable
-            print("[arduino-cli] Updating core index...")
-            subprocess.run(
+            # Always refresh the full index so missing/corrupt index files
+            # are re-downloaded.  Log stderr so warnings (like unreachable
+            # third-party servers) are visible in the container logs.
+            print("[arduino-cli] Refreshing core indexes...")
+            result = subprocess.run(
                 [self.cli_path, "core", "update-index"],
                 capture_output=True, text=True
             )
+            if result.returncode != 0:
+                print(f"[arduino-cli] core update-index exited {result.returncode}")
+                if result.stderr:
+                    print(f"[arduino-cli] stderr: {result.stderr.strip()}")
+
+            # Fallback: if the Drazzy index file is still missing, download it
+            # directly.  Some environments have transient DNS / network issues
+            # and arduino-cli silently skips unavailable indexes.
+            drazzy_path = Path("/root/.arduino15/package_drazzy.com_index.json")
+            if not drazzy_path.exists():
+                print("[arduino-cli] Drazzy index missing — fetching directly...")
+                import urllib.request
+                try:
+                    urllib.request.urlretrieve(
+                        "http://drazzy.com/package_drazzy.com_index.json",
+                        str(drazzy_path),
+                    )
+                    print("[arduino-cli] Drazzy index downloaded.")
+                except Exception as fetch_err:
+                    print(f"[arduino-cli] Direct fetch failed: {fetch_err}")
         except Exception as e:
-            print(f"Warning: Could not configure board URLs: {e}")
+            print(f"[arduino-cli] Warning: Could not configure board URLs: {e}")
 
     def _ensure_core_installed(self):
         """

src/components/velxio/components/editor/EditorToolbar.tsx

@@ -398,10 +398,22 @@ export const EditorToolbar = ({
     setCompiling(true);
     setMessage(null);
     setConsoleOpen(true);
-    // Wipe the previous build's output before we append anything new.
-    // Issue #209: lingering logs from prior compiles made it impossible
-    // to tell the latest errors / warnings apart from stale ones.
-    setCompileLogs([]);
+    // Wipe the previous build's output and immediately show a placeholder
+    // so the console is never blank when it opens.
+    setCompileLogs([
+      {
+        timestamp: new Date(),
+        type: "info",
+        message: "Compiling...",
+        target: activeBoardId
+          ? {
+              id: activeBoardId,
+              label: activeBoard ? boardDisplayName(activeBoard) : "Unknown",
+              kind: "board" as const,
+            }
+          : undefined,
+      },
+    ]);
     trackCompileCode();
 
     // ── Custom-chip preparation ─────────────────────────────────────────