chore(ui): clear remaining frontend warnings

Resolve the remaining lint warnings without changing behavior by fixing hook dependency lists, removing the icon naming false positive, and switching the YouTube thumbnail to next/image for compliant rendering.

frontend/components/Editor/EditorToolbar/InsertTools.tsx

@@ -1,4 +1,4 @@
-import { Link2, Image, Code } from "lucide-react";
+import { Link2, Image as ImageIcon, Code } from "lucide-react";
 
 interface InsertToolsProps {
   insertLink: () => void;
@@ -25,7 +25,7 @@ export function InsertTools({
         onClick={insertImage}
         title="Upload image"
       >
-        <Image className="w-3.5 h-3.5" />
+        <ImageIcon className="w-3.5 h-3.5" />
       </button>
       <button
         className="p-1.5 hover:bg-accent rounded"

frontend/components/Editor/hooks/useEditorCommands.ts

@@ -76,7 +76,7 @@ export const useEditorCommands = (
       // Update HTML
       handleChange();
     },
-    [findStyleParent, getSelection, removeStyle]
+    [editorRef, findStyleParent, getSelection, handleChange]
   );
 
   // Align text
@@ -129,7 +129,7 @@ export const useEditorCommands = (
       // Update HTML
       handleChange();
     },
-    [getSelection]
+    [editorRef, getSelection, handleChange]
   );
 
   // Set font style
@@ -218,7 +218,7 @@ export const useEditorCommands = (
 
       handleChange();
     },
-    [getSelection, findStyleParent, cleanupSpan]
+    [cleanupSpan, findStyleParent, getSelection, handleChange]
   );
 
   // Insert link
@@ -258,7 +258,7 @@ export const useEditorCommands = (
         handleChange();
       }
     }
-  }, [getSelection]);
+  }, [getSelection, handleChange]);
 
   // Insert image
   const insertImage = useCallback(() => {
@@ -290,7 +290,7 @@ export const useEditorCommands = (
       }
     };
     input.click();
-  }, [getSelection]);
+  }, [getSelection, handleChange]);
 
   // Insert code block
   const insertCodeBlock = useCallback(() => {
@@ -318,7 +318,7 @@ export const useEditorCommands = (
     range.deleteContents();
     range.insertNode(pre);
     handleChange();
-  }, [getSelection]);
+  }, [getSelection, handleChange]);
 
   return {
     formatText,