Align one-shot spatial smoothing with stream ramp profile

client/public/version.js

@@ -1,5 +1,5 @@
 // Maintainer-controlled web client version.
 // Format: YYYY.MM.DD Rn (example: 2026.02.20 R2)
-window.CHGRID_WEB_VERSION = "2026.02.25 R279";
+window.CHGRID_WEB_VERSION = "2026.02.25 R280";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";

client/src/audio/audioEngine.ts

@@ -643,7 +643,7 @@ export class AudioEngine {
       pannerNode: sample.pannerNode,
       mix,
       outputMode: this.outputMode,
-      transition: 'linear',
+      transition: 'target',
     });
   }