Fix ESLint errors in shared types, hooks, and UI components

Remove unused imports. Replace empty interfaces with type aliases.
Fix a const used only as a type. Export DialogClose so it's not
flagged as unused.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ambv

frontend/src/components/diff/CommitTooltipContent.tsx

@@ -1,7 +1,6 @@
 'use client';
 
 import type { Commit } from '@/lib/types';
-import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 
 interface CommitTooltipContentProps {
   commit?: Commit;

frontend/src/components/ui/collapsible.tsx

@@ -1,6 +1,5 @@
 'use client';
 
-import * as React from 'react';
 import * as CollapsiblePrimitive from '@radix-ui/react-collapsible';
 
 const Collapsible = CollapsiblePrimitive.Root;

frontend/src/components/ui/dialog.tsx

@@ -110,6 +110,7 @@ DialogDescription.displayName = DialogPrimitive.Description.displayName;
 
 export {
   Dialog,
+  DialogClose,
   DialogTrigger,
   DialogContent,
   DialogHeader,

frontend/src/components/ui/textarea.tsx

@@ -2,8 +2,7 @@ import * as React from 'react';
 
 import { cn } from '@/lib/utils';
 
-export interface TextareaProps
-  extends React.TextareaHTMLAttributes<HTMLTextAreaElement> {}
+export type TextareaProps = React.TextareaHTMLAttributes<HTMLTextAreaElement>;
 
 const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
   ({ className, ...props }, ref) => {

frontend/src/hooks/use-toast.ts

@@ -15,21 +15,19 @@ type ToasterToast = ToastProps & {
   action?: ToastActionElement;
 };
 
-const actionTypes = {
-  ADD_TOAST: 'ADD_TOAST',
-  UPDATE_TOAST: 'UPDATE_TOAST',
-  DISMISS_TOAST: 'DISMISS_TOAST',
-  REMOVE_TOAST: 'REMOVE_TOAST',
-} as const;
-
 let count = 0;
 
 function genId() {
   count = (count + 1) % Number.MAX_SAFE_INTEGER;
   return count.toString();
 }
 
-type ActionType = typeof actionTypes;
+type ActionType = {
+  ADD_TOAST: 'ADD_TOAST';
+  UPDATE_TOAST: 'UPDATE_TOAST';
+  DISMISS_TOAST: 'DISMISS_TOAST';
+  REMOVE_TOAST: 'REMOVE_TOAST';
+};
 
 type Action =
   | {

frontend/src/lib/api.ts

@@ -5,12 +5,9 @@ import type {
   DiffTableRow,
   Environment,
   PythonVersionFilterOption,
-  BenchmarkResultJson,
-  AuthToken,
   TokenCreate,
   TokenUpdate,
   TokenAnalytics,
-  AdminUser,
   AdminUserCreate,
   AdminCurrentUser,
   GitHubAuthResponse,
@@ -20,7 +17,6 @@ import type {
   DatabaseTable,
   TableSchema,
   QueryResult,
-  BenchmarkResult,
   BenchmarkResultUpdate,
   CommitUpdate,
   BinaryCreate,
@@ -36,13 +32,10 @@ import type {
   EnvironmentSummary,
   CommitSummary,
   BatchTrendsResponse,
-  UploadResponse,
   TrendRequest,
-  TrendQueryParams,
   BatchTrendRequest,
   BenchmarkNamesQueryParams,
   DiffQueryParams,
-  UploadRequestData,
 } from '../types/api';
 
 const API_BASE =

frontend/src/types/api.ts

@@ -60,7 +60,7 @@ export interface TrendRequest {
 }
 
 // Keep TrendQueryParams as alias for backward compatibility
-export interface TrendQueryParams extends TrendRequest {}
+export type TrendQueryParams = TrendRequest;
 
 export interface UploadRequestData {
   commit_sha: string;

frontend/src/types/components.ts

@@ -1,11 +1,5 @@
 import { ReactNode } from 'react';
-import {
-  Binary,
-  Environment,
-  PythonVersionFilterOption,
-  DiffTableRow,
-} from '@/lib/types';
-import { ChartDataPoint, TrendDataPoint } from './api';
+import { ChartDataPoint } from './api';
 
 // Base component props
 export interface BaseComponentProps {