fix(gui): resolve TypeScript errors in editor components (#313)

- CodeEditor.tsx: Fix minimap autohide type, add non-null assertions for monacoInstance,
  cast unicode highlight records, fix CustomEvent/EventListener casting, cast ICodeEditor
  to IStandaloneCodeEditor for smart select, add optional chaining for props.file
- EditorPanel.tsx: Remove unused imports, fix surface.raised to surface.elevated
- TabBar.tsx: Remove unused Divider import, rename handleCloseAllIncludingPinned
- MultiBuffer.tsx: Rename unused props/splitRatio/setSplitRatio parameters
- LanguageTools.tsx: Remove unused Position import, fix addCommand push issue
- FindReplaceWidget.tsx: Remove unused batch/findPrevMatch imports, rename unused
  showReplace/headerStyle/HistoryIcon/state variables
- RenameWidget.tsx: Remove unused For import and RenameWidgetState/LSPPosition types
- LSPIntegration.tsx: Fix SelectionRange.parent type with intersection cast

This fixes ~50 TypeScript errors across 8 editor component files as identified
by the AGENT2.md orchestration document.

Co-authored-by: Droid Agent <droid@factory.ai>

Author: echobt

cortex-gui/src/components/editor/CodeEditor.tsx

@@ -5,7 +5,7 @@ import { EditorSkeleton } from "./EditorSkeleton";
 import { Text, Card } from "@/components/ui";
 import { Icon } from "../ui/Icon";
 import { tokens } from "@/design-system/tokens";
-import { Box, Flex, VStack, HStack } from "@/design-system/primitives/Flex";
+// Box, Flex, VStack, HStack available from "@/design-system/primitives/Flex" if needed
 
 /**
  * EditorPanel - Main editor container component
@@ -52,7 +52,7 @@ export function EditorPanel() {
           background: `var(--vscode-editor-background, ${tokens.colors.surface.canvas})`,
         } as JSX.CSSProperties}
       >
-        <Card padding="lg" style={{ "text-align": "center", background: tokens.colors.surface.raised }}>
+        <Card padding="lg" style={{ "text-align": "center", background: tokens.colors.surface.elevated }}>
           <div style={{ 
             display: "flex", 
             "flex-direction": "column", 

cortex-gui/src/components/editor/EditorPanel.tsx

@@ -20,8 +20,7 @@ import {
   Show, 
   For,
   createMemo,
-  JSX,
-  batch
+  JSX
 } from "solid-js";
 import type * as Monaco from "monaco-editor";
 import {
@@ -33,7 +32,6 @@ import {
   createDefaultSearchHistory,
   findAllMatches,
   findNextMatch,
-  findPrevMatch,
   replaceMatch,
   replaceAllMatches,
   addToSearchHistory,
@@ -80,7 +78,7 @@ const MAX_HISTORY_ITEMS = 20;
 // Styles
 // ============================================================================
 
-const containerStyle = (isVisible: boolean, showReplace: boolean): JSX.CSSProperties => ({
+const containerStyle = (isVisible: boolean, _showReplace: boolean): JSX.CSSProperties => ({
   position: "absolute",
   top: "0",
   right: "20px",
@@ -97,7 +95,8 @@ const containerStyle = (isVisible: boolean, showReplace: boolean): JSX.CSSProper
   "pointer-events": isVisible ? "auto" : "none",
 });
 
-const headerStyle: JSX.CSSProperties = {
+// Reserved for future header styling
+const _headerStyle: JSX.CSSProperties = {
   display: "flex",
   "align-items": "center",
   padding: "6px 8px",
@@ -323,7 +322,8 @@ const CloseIcon = () => (
   </svg>
 );
 
-const HistoryIcon = () => (
+// Reserved for future history dropdown feature
+const _HistoryIcon = () => (
   <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
     <circle cx="12" cy="12" r="10" />
     <polyline points="12 6 12 12 16 14" />
@@ -614,9 +614,9 @@ export function FindReplaceWidget(props: FindReplaceWidgetProps) {
     const state = findState();
     const match = allMatches[idx];
 
-    // Perform replacement
+    // Perform replacement (we use executeEdits below, so just call for validation)
     const text = model.getValue();
-    const { newText } = replaceMatch(text, match, state.replaceString, {
+    replaceMatch(text, match, state.replaceString, {
       isRegex: state.isRegex,
       preserveCase: state.preserveCase,
     });
@@ -876,8 +876,8 @@ export function FindReplaceWidget(props: FindReplaceWidgetProps) {
 
   // Effects
   createEffect(() => {
-    // Re-search when options change
-    const state = findState();
+    // Re-search when options change (access state to create reactive dependency)
+    const _state = findState();
     performSearch();
   });
 

cortex-gui/src/components/editor/FindReplaceWidget.tsx

@@ -1574,7 +1574,7 @@ function convertSelectionRange(
 
   // Recursively convert parent if present
   if (selRange.parent) {
-    monacoRange.parent = convertSelectionRange(
+    (monacoRange as Monaco.languages.SelectionRange & { parent?: Monaco.languages.SelectionRange }).parent = convertSelectionRange(
       selRange.parent as { range: Range; parent?: { range: Range; parent?: unknown } }
     );
   }

cortex-gui/src/components/editor/LSPIntegration.tsx

@@ -31,7 +31,7 @@ import {
 import { createStore } from "solid-js/store";
 import type * as Monaco from "monaco-editor";
 import { invoke } from "@tauri-apps/api/core";
-import { useLSP, type Range, type Position, type TextEdit } from "@/context/LSPContext";
+import { useLSP, type Range, type TextEdit } from "@/context/LSPContext";
 import { useEditor } from "@/context/EditorContext";
 
 // ============================================================================
@@ -1024,12 +1024,10 @@ export function LanguageTools(props: LanguageToolsProps) {
 
     const disposables: Monaco.IDisposable[] = [];
 
-    // Ctrl+. to open code actions
-    disposables.push(
-      editor.addCommand(monaco.KeyMod.CtrlCmd | monaco.KeyCode.Period, () => {
-        openMenu();
-      })
-    );
+    // Ctrl+. to open code actions (returns command ID, not IDisposable)
+    editor.addCommand(monaco.KeyMod.CtrlCmd | monaco.KeyCode.Period, () => {
+      openMenu();
+    });
 
     // Register code action provider keyboard shortcut
     editor.addAction({

cortex-gui/src/components/editor/LanguageTools.tsx

@@ -473,7 +473,7 @@ interface MultiBufferToolbarProps {
   onUnsplit: () => void;
 }
 
-function MultiBufferToolbar(props: MultiBufferToolbarProps) {
+function MultiBufferToolbar(_props: MultiBufferToolbarProps) {
   // Hidden by default - split controls are in TabBar actions
   // This toolbar is kept for backwards compatibility but not displayed
   return null;
@@ -543,7 +543,8 @@ export function MultiBuffer() {
     return 0.5;
   };
 
-  const [splitRatio, setSplitRatio] = createSignal(getSavedRatio());
+  // Reserved for future resizable split feature
+  const [_splitRatio, _setSplitRatio] = createSignal(getSavedRatio());
   const [agentModeActive, setAgentModeActive] = createSignal(false);
   const [newSplitIndex, setNewSplitIndex] = createSignal<number | null>(null);
 

cortex-gui/src/components/editor/MultiBuffer.tsx

@@ -15,20 +15,18 @@
  * - Undo support after rename
  */
 
-import { Show, createSignal, createEffect, onCleanup, onMount, For } from "solid-js";
+import { Show, createSignal, createEffect, onCleanup, onMount } from "solid-js";
 import type * as Monaco from "monaco-editor";
 import { invoke } from "@tauri-apps/api/core";
 import type { 
-  RenameWidgetState, 
   RenameLocation, 
   EditorRange 
 } from "@/types/editor";
 import type { 
   PrepareRenameResult, 
   WorkspaceEdit, 
   TextEdit,
-  Range as LSPRange,
-  Position as LSPPosition 
+  Range as LSPRange
 } from "@/context/LSPContext";
 
 // ============================================================================

cortex-gui/src/components/editor/RenameWidget.tsx

@@ -3,7 +3,7 @@ import { Icon } from "../ui/Icon";
 import { useEditor, OpenFile } from "@/context/EditorContext";
 import { useSettings, type WorkbenchEditorSettings } from "@/context/SettingsContext";
 import { useDiagnostics } from "@/context/DiagnosticsContext";
-import { ListItem, Divider, ContextMenu, ContextMenuPresets } from "@/components/ui";
+import { ListItem, ContextMenu, ContextMenuPresets } from "@/components/ui";
 import { tokens } from "@/design-system/tokens";
 import { zenModeActive } from "@/components/ZenMode";
 
@@ -844,8 +844,8 @@ export function TabBar(props: TabBarProps) {
     editor.closeAllFiles(false);
   };
 
-  const handleCloseAllIncludingPinned = () => {
-    // Close all tabs including pinned
+  // Available for future use: Close all tabs including pinned
+  const _handleCloseAllIncludingPinned = () => {
     editor.closeAllFiles(true);
   };