chore(sync): merge official v1.5.1 release

# Conflicts:
#	VERSION

web/src/components/canvas/canvas-cloud-agent-panel.tsx

@@ -11,6 +11,7 @@ import { nanoid } from "nanoid";
 import { ModelPicker } from "@/components/model-picker";
 import { FluidOrb } from "@/components/ui/fluid-orb";
 import { cn } from "@/lib/utils";
+import { markdownPlainText } from "@/lib/markdown-plain-text";
 import { modelCapabilityConfigFor } from "@/lib/model-capabilities";
 import type { CanvasResourceReference } from "@/lib/canvas/canvas-resource-references";
 import { canvasThemes, type CanvasTheme } from "@/lib/canvas-theme";