refactor: convert unnecessary named handlers to inline functions

Simplifies code by removing named handler functions that only pass
through arguments to other functions without adding meaningful logic or
transformation.

Changes: - terminal-link.tsx: handleMouseOver/handleMouseOut → inline
arrow functions - message-block.tsx: handleToggleAgentListCollapsed →
inline arrow function - chat.tsx: handleActivateRepoPath → inline arrow
function

This improves consistency with existing inline patterns in the codebase
and reduces unnecessary indirection.

Author: brandonkachen

cli/src/chat.tsx

@@ -283,10 +283,6 @@ export const App = ({
         ? repoRoot // If outside home dir, show absolute path
         : `~/${relativePath}`
 
-      const handleActivateRepoPath = async () => {
-        await openFileAtPath(repoRoot)
-      }
-
       const renderRepoPathInfo = () => (
         <text wrap={true}>
           Codebuff can read and write files in{' '}
@@ -295,7 +291,7 @@ export const App = ({
             color="#3b82f6"
             inline={true}
             underlineOnHover={true}
-            onActivate={handleActivateRepoPath}
+            onActivate={() => openFileAtPath(repoRoot)}
           />
           , and run terminal commands to help you build.
         </text>

cli/src/components/message-block.tsx

@@ -252,10 +252,6 @@ export const MessageBlock = ({
     isLastBranch: boolean,
     keyPrefix: string,
   ): React.ReactNode {
-    const handleToggleAgentListCollapsed = () => {
-      onToggleCollapsed(agentListBlock.id)
-    }
-
     const TRUNCATE_LIMIT = 5
     const isCollapsed = collapsedAgents.has(agentListBlock.id)
     const { agents } = agentListBlock
@@ -330,7 +326,7 @@ export const MessageBlock = ({
           streamingPreview=""
           finishedPreview={finishedPreview}
           theme={theme}
-          onToggle={handleToggleAgentListCollapsed}
+          onToggle={() => onToggleCollapsed(agentListBlock.id)}
         />
       </box>
     )

cli/src/components/terminal-link.tsx

@@ -55,26 +55,15 @@ export const TerminalLink: React.FC<TerminalLinkProps> = ({
     return <span fg={displayColor}>{text}</span>
   }
 
-  const handleMouseOver = () => {
-    setIsHovered(true)
+  const renderLine = (line: string, index: number) => {
+    const coloredText = <span fg={displayColor}>{line}</span>
+    return (
+      <text key={index} wrap={lineWrap}>
+        {shouldUnderline ? <u>{coloredText}</u> : coloredText}
+      </text>
+    )
   }
 
-  const handleMouseOut = () => {
-    setIsHovered(false)
-  }
-
-  const renderLine = (line: string, index: number) => (
-    <text key={index} wrap={lineWrap}>
-      {shouldUnderline ? (
-        <u>
-          <span fg={displayColor}>{line}</span>
-        </u>
-      ) : (
-        <span fg={displayColor}>{line}</span>
-      )}
-    </text>
-  )
-
   return (
     <box
       style={{
@@ -84,8 +73,8 @@ export const TerminalLink: React.FC<TerminalLinkProps> = ({
         gap: 0,
         ...containerStyle,
       }}
-      onMouseOver={handleMouseOver}
-      onMouseOut={handleMouseOut}
+      onMouseOver={() => setIsHovered(true)}
+      onMouseOut={() => setIsHovered(false)}
       onMouseDown={handleActivate}
     >
       {displayLines.map(renderLine)}