Merge origin/main into dev (second round)

Resolve 21 conflicts from latest main (provider profiles, Windows fixes, 0.1.55-rc.1).
Fix all type errors and syntax issues from merge artifacts.

packages/app/src/components/agent-stream-view.tsx

@@ -74,6 +74,7 @@ import {
   WORKING_INDICATOR_CYCLE_MS,
   WORKING_INDICATOR_OFFSETS,
 } from "@/utils/working-indicator";
+import { isWeb } from "@/constants/platform";
 
 const isUserMessageItem = (item?: StreamItem) => item?.kind === "user_message";
 const isToolSequenceItem = (item?: StreamItem) =>
@@ -222,7 +223,7 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
       return buildAgentStreamRenderModel({
         tail: streamItems,
         head: streamHead ?? [],
-        platform: Platform.OS === "web" ? "web" : "native",
+        platform: isWeb ? "web" : "native",
         isMobileBreakpoint: isMobile,
       });
     }, [isMobile, streamHead, streamItems]);