Merge main into bb/gui.

Resolve merge conflicts while preserving bb/gui dashboard paths and STT provider support.

web/scripts/sync-assets.mjs

@@ -0,0 +1,27 @@
+#!/usr/bin/env node
+// Cross-platform replacement for the previous shell pipeline:
+//
+//   rm -rf public/fonts public/ds-assets
+//   && cp -r node_modules/@nous-research/ui/dist/fonts public/fonts
+//   && cp -r node_modules/@nous-research/ui/dist/assets public/ds-assets
+//
+// `rm -rf` / `cp -r` don't exist on Windows cmd.exe, so `npm run build`
+// (invoked from Python via subprocess → cmd.exe) failed before Vite ran.
+// Using Node's stdlib fs keeps this dependency-free and platform-neutral.
+
+import { cpSync, rmSync } from "node:fs";
+import { dirname, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const webRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");
+const uiDist = resolve(webRoot, "node_modules", "@nous-research", "ui", "dist");
+
+const targets = [
+  { from: resolve(uiDist, "fonts"), to: resolve(webRoot, "public", "fonts") },
+  { from: resolve(uiDist, "assets"), to: resolve(webRoot, "public", "ds-assets") },
+];
+
+for (const { from, to } of targets) {
+  rmSync(to, { recursive: true, force: true });
+  cpSync(from, to, { recursive: true });
+}