fix(gui): resolve TypeScript errors in testing and debug components

- TestExplorer.tsx: Remove unused batch import, export getStatusColor/StatusFilterButton,
  add collapseAll button, fix Set<string> typing
- CoverageBars.tsx: Remove unused onCleanup, fix SVG stroke-dasharray/dashoffset string types,
  prefix unused variables with underscore
- CoverageView.tsx: Remove unused imports (batch, onMount, onCleanup, CoverageStats, CoverageChange),
  prefix tree-related variables for future use, fix Badge variant/size props
- TestDecorations.tsx: Remove unused For/Show/Icon imports, fix glyphClass type annotation
- TestCoverageOverlay.tsx: Remove unused LineCoverageStatus import, use void expression
- TestOutputPanel.tsx: Remove unused onCleanup/tokens imports, fix testId duplicate property
- DebugHoverWidget.tsx: Remove unused JSX/batch/isExpandable imports, prefix debug variable
- ExceptionWidget.tsx: Remove unused ExceptionWidgetPosition import
- BreakpointsView.tsx: Remove unused createMemo import

These changes address TypeScript compilation warnings (TS6133/TS6196) and type errors
in the testing panel and debug widget components.

Author: factorydroid

cortex-gui/src/components/debug/DebugHoverWidget.tsx

@@ -20,21 +20,17 @@ import {
   createSignal,
   createEffect,
   onCleanup,
-  JSX,
   createMemo,
-  batch,
 } from "solid-js";
 import { Portal } from "solid-js/web";
 import { useDebug, Variable } from "@/context/DebugContext";
 import { Icon } from "../ui/Icon";
 import {
-  DebugHoverResult,
   DebugHoverState,
   SafeTriangle,
   calculateSafeTriangle,
   isPointInTriangle,
   formatDebugValue,
-  isExpandable,
   getVariableIcon,
   getValueForCopy,
   calculateHoverPosition,
@@ -340,7 +336,8 @@ function TreeNode(props: TreeNodeProps) {
 // ============================================================================
 
 export function DebugHoverWidget(props: DebugHoverWidgetProps) {
-  const debug = useDebug();
+  // Debug context available for future features
+  const _debug = useDebug();
   let containerRef: HTMLDivElement | undefined;
   let safeTriangle: SafeTriangle | null = null;
   let closeTimeout: ReturnType<typeof setTimeout> | null = null;

cortex-gui/src/components/debug/ExceptionWidget.tsx

@@ -22,7 +22,6 @@ import { useDebug } from "../../context/DebugContext";
 import type {
   ExceptionInfo,
   ExceptionDetails,
-  ExceptionWidgetPosition,
 } from "../../types/debug";
 
 // ============================================================================

cortex-gui/src/components/debugger/BreakpointsView.tsx

@@ -1,4 +1,4 @@
-import { Show, For, createSignal, createMemo } from "solid-js";
+import { Show, For, createSignal } from "solid-js";
 import { useDebug, Breakpoint, DataBreakpoint, DataBreakpointAccessType, ExceptionBreakpoint, BreakpointGroup, createBreakpointId } from "@/context/DebugContext";
 import { useEditor } from "@/context/EditorContext";
 import { Icon } from "../ui/Icon";