fix(frontend): remove thoughts button (#2892)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

frontend/app/chat/[chatId]/components/ChatDialogueArea/components/ChatDialogue/components/ChatItem/QADisplay/components/MessageRow/MessageRow.tsx

@@ -5,7 +5,6 @@ import { useChat } from "@/app/chat/[chatId]/hooks/useChat";
 import { useChatApi } from "@/lib/api/chat/useChatApi";
 import { CopyButton } from "@/lib/components/ui/CopyButton";
 import Icon from "@/lib/components/ui/Icon/Icon";
-import { ThoughtsButton } from "@/lib/components/ui/ThoughtsButton";
 import { Source } from "@/lib/types/MessageMetadata";
 
 import styles from "./MessageRow.module.scss";
@@ -116,9 +115,6 @@ export const MessageRow = ({
               sourceFiles.length === 0 ? styles.with_border : ""
             }`}
           >
-            {metadata?.thoughts && metadata.thoughts.trim() !== "" && (
-              <ThoughtsButton text={metadata.thoughts} size="small" />
-            )}
             <CopyButton handleCopy={handleCopy} size="small" />
             <Icon
               name="thumbsUp"

frontend/lib/components/PageHeader/PageHeader.module.scss

@@ -8,7 +8,7 @@
   align-items: center;
   justify-content: space-between;
   padding: Spacings.$spacing04;
-  padding-left: Spacings.$spacing09;
+  padding-inline: Spacings.$spacing09;
   border-bottom: 1px solid var(--border-1);
   height: Variables.$pageHeaderHeight;
   width: 100%;

frontend/lib/components/ui/ThoughtsButton.tsx

@@ -1,21 +0,0 @@
-import Icon from "@/lib/components/ui/Icon/Icon";
-import Tooltip from "@/lib/components/ui/Tooltip/Tooltip";
-import { IconSize } from "@/lib/types/Icons";
-
-type ThoughtsButtonProps = {
-  text: string;
-  size: IconSize;
-};
-
-export const ThoughtsButton = ({
-  text,
-  size,
-}: ThoughtsButtonProps): JSX.Element => {
-  return (
-    <Tooltip tooltip={`How did I get here?\n\n${text}`}>
-      <div>
-        <Icon name="eureka" size={size} color="black" handleHover={true} />
-      </div>
-    </Tooltip>
-  );
-};