Clear a tiny message-component batch of unused React imports (#321)

This sixth pass continues issue #314 with a message-focused micro-batch: three tiny message components that each only surfaced a single unused React import warning. The batch stays intentionally minimal and behavior-neutral.

Constraint: Keep pass 6 limited to one-line message-component cleanup with the same warning shape
Rejected: Mix in broader message component cleanup or unrelated typing fixes | would dilute the micro-pass and expand review scope unnecessarily
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Continue splitting by path + warning shape when easy one-line cleanups are available
Tested: bun run build; bun run smoke; targeted noUnused grep for touched files via bun x tsc --noEmit --noUnusedLocals --noUnusedParameters --pretty false
Not-tested: full repo typecheck (broader baseline noise remains outside this pass)

Co-authored-by: anandh8x <test@example.com>

src/components/messages/CompactBoundaryMessage.tsx

@@ -1,5 +1,4 @@
 import { c as _c } from "react-compiler-runtime";
-import * as React from 'react';
 import { Box, Text } from '../../ink.js';
 import { useShortcutDisplay } from '../../keybindings/useShortcutDisplay.js';
 export function CompactBoundaryMessage() {

src/components/messages/UserToolResultMessage/RejectedToolUseMessage.tsx

@@ -1,5 +1,4 @@
 import { c as _c } from "react-compiler-runtime";
-import * as React from 'react';
 import { Text } from '../../../ink.js';
 import { MessageResponse } from '../../MessageResponse.js';
 export function RejectedToolUseMessage() {

src/components/messages/UserToolResultMessage/UserToolCanceledMessage.tsx

@@ -1,5 +1,4 @@
 import { c as _c } from "react-compiler-runtime";
-import * as React from 'react';
 import { InterruptedByUser } from 'src/components/InterruptedByUser.js';
 import { MessageResponse } from 'src/components/MessageResponse.js';
 export function UserToolCanceledMessage() {