diff --git a/app/ui/app/src/components/ChatForm.tsx b/app/ui/app/src/components/ChatForm.tsx
index b0ae1af74..bc205c359 100644
--- a/app/ui/app/src/components/ChatForm.tsx
+++ b/app/ui/app/src/components/ChatForm.tsx
@@ -102,9 +102,9 @@ function ChatForm({
   const fileInputRef = useRef<HTMLInputElement>(null);
   const textareaRef = useRef<HTMLTextAreaElement>(null);
   const thinkButtonRef = useRef<HTMLButtonElement>(null);
-  const thinkingLevelButtonRef = useRef<HTMLButtonElement>(null);
+  const thinkingLevelButtonRef = useRef<HTMLButtonElement & { closeDropdown?: () => void }>(null);
   const webSearchButtonRef = useRef<HTMLButtonElement>(null);
-  const modelPickerRef = useRef<HTMLButtonElement>(null);
+  const modelPickerRef = useRef<HTMLButtonElement & { closeDropdown?: () => void }>(null);
   const submitButtonRef = useRef<HTMLButtonElement>(null);
 
   const { mutate: sendMessageMutation } = useSendMessage(chatId);
@@ -126,9 +126,9 @@ function ChatForm({
     if (
       isOpen &&
       modelPickerRef.current &&
-      (modelPickerRef.current as any).closeDropdown
+      modelPickerRef.current.closeDropdown
     ) {
-      (modelPickerRef.current as any).closeDropdown();
+      modelPickerRef.current.closeDropdown();
     }
   };
 
@@ -136,9 +136,9 @@ function ChatForm({
     if (
       isOpen &&
       thinkingLevelButtonRef.current &&
-      (thinkingLevelButtonRef.current as any).closeDropdown
+      thinkingLevelButtonRef.current.closeDropdown
     ) {
-      (thinkingLevelButtonRef.current as any).closeDropdown();
+      thinkingLevelButtonRef.current.closeDropdown();
     }
   };
 
diff --git a/app/ui/app/src/components/MessageList.tsx b/app/ui/app/src/components/MessageList.tsx
index 63c87b5d0..b9e39e324 100644
--- a/app/ui/app/src/components/MessageList.tsx
+++ b/app/ui/app/src/components/MessageList.tsx
@@ -23,7 +23,7 @@ export default function MessageList({
   onEditMessage?: (content: string, index: number) => void | Promise<void>;
   editingMessageIndex?: number;
   error?: ErrorEvent | null;
-  browserToolResult?: any;
+  browserToolResult?: { page_stack: string[] };
 }) {
   const [showDots, setShowDots] = React.useState(false);
   const isDownloadingModel = downloadProgress && !downloadProgress.done;
@@ -54,9 +54,9 @@ export default function MessageList({
     const queries: (string | undefined)[] = [];
     let lastQuery: string | undefined = undefined;
     for (let i = 0; i < messages.length; i++) {
-      const m: any = messages[i] as any;
-      const toolCalls: any[] | undefined = Array.isArray(m?.tool_calls)
-        ? (m.tool_calls as any[])
+      const m = messages[i];
+      const toolCalls = Array.isArray(m?.tool_calls)
+        ? m.tool_calls
         : m?.tool_call
           ? [m.tool_call]
           : undefined;
diff --git a/app/ui/app/src/components/ModelPicker.tsx b/app/ui/app/src/components/ModelPicker.tsx
index 2dba77d8c..648186a6b 100644
--- a/app/ui/app/src/components/ModelPicker.tsx
+++ b/app/ui/app/src/components/ModelPicker.tsx
@@ -89,7 +89,8 @@ export const ModelPicker = forwardRef<
 
   useEffect(() => {
     if (ref && typeof ref === "object" && ref.current) {
-      (ref.current as any).closeDropdown = () => setIsOpen(false);
+      const mutableRef = ref as React.MutableRefObject<HTMLButtonElement & { closeDropdown?: () => void }>;
+      mutableRef.current.closeDropdown = () => setIsOpen(false);
     }
   }, [ref, setIsOpen]);
 
diff --git a/app/ui/app/src/components/ThinkButton.tsx b/app/ui/app/src/components/ThinkButton.tsx
index ff940267d..2d05f0222 100644
--- a/app/ui/app/src/components/ThinkButton.tsx
+++ b/app/ui/app/src/components/ThinkButton.tsx
@@ -46,7 +46,8 @@ export const ThinkButton = forwardRef<HTMLButtonElement, ThinkButtonProps>(
         ref.current &&
         mode === "thinkingLevel"
       ) {
-        (ref.current as any).closeDropdown = () => setIsDropdownOpen(false);
+        const mutableRef = ref as React.MutableRefObject<HTMLButtonElement & { closeDropdown?: () => void }>;
+        mutableRef.current.closeDropdown = () => setIsDropdownOpen(false);
       }
     }, [ref, mode]);
 
diff --git a/app/ui/app/src/hooks/useChats.ts b/app/ui/app/src/hooks/useChats.ts
index 5aac35285..c9431f3cd 100644
--- a/app/ui/app/src/hooks/useChats.ts
+++ b/app/ui/app/src/hooks/useChats.ts
@@ -1,6 +1,6 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { getChats, getChat, sendMessage, type ChatEventUnion } from "../api";
-import { Chat, ErrorEvent, Model } from "@/gotypes";
+import { Chat, ChatEvent, ErrorEvent, Model } from "@/gotypes";
 import { Message } from "@/gotypes";
 import { useSelectedModel } from "./useSelectedModel";
 import { createQueryBatcher } from "./useQueryBatcher";
@@ -568,9 +568,9 @@ export const useSendMessage = (chatId: string) => {
                       thinkingTimeEnd: event.thinkingTimeEnd,
                     }),
                     {
-                      tool_result: (event as any).toolResultData,
-                      ...((event as any).toolName
-                        ? { tool_name: (event as any).toolName }
+                      tool_result: (event as ChatEvent).toolResultData,
+                      ...((event as ChatEvent).toolName
+                        ? { tool_name: (event as ChatEvent).toolName }
                         : {}),
                     },
                   ),