diff --git a/api/routers/notes.py b/api/routers/notes.py
index 4935057..ddc8f15 100644
--- a/api/routers/notes.py
+++ b/api/routers/notes.py
@@ -96,7 +96,7 @@ async def create_note(note_data: NoteCreate):
             note_type=new_note.note_type,
             created=str(new_note.created),
             updated=str(new_note.updated),
-            command_id=command_id,
+            command_id=str(command_id) if command_id else None,
         )
     except HTTPException:
         raise
@@ -160,7 +160,7 @@ async def update_note(note_id: str, note_update: NoteUpdate):
             note_type=note.note_type,
             created=str(note.created),
             updated=str(note.updated),
-            command_id=command_id,
+            command_id=str(command_id) if command_id else None,
         )
     except HTTPException:
         raise
diff --git a/frontend/src/app/(dashboard)/notebooks/components/NoteEditorDialog.tsx b/frontend/src/app/(dashboard)/notebooks/components/NoteEditorDialog.tsx
index b787ebe..89604e0 100644
--- a/frontend/src/app/(dashboard)/notebooks/components/NoteEditorDialog.tsx
+++ b/frontend/src/app/(dashboard)/notebooks/components/NoteEditorDialog.tsx
@@ -126,7 +126,7 @@ export function NoteEditorDialog({ open, onOpenChange, notebookId, note }: NoteE
         <DialogTitle className="sr-only">
           {isEditing ? t.sources.editNote : t.sources.createNote}
         </DialogTitle>
-        <form onSubmit={handleSubmit(onSubmit)} className="flex h-full flex-col">
+        <form onSubmit={handleSubmit(onSubmit)} className="flex h-full flex-col min-w-0">
           {isEditing && noteLoading ? (
             <div className="flex-1 flex items-center justify-center py-10">
               <span className="text-sm text-muted-foreground">{t.common.loading}</span>
diff --git a/frontend/src/components/common/InlineEdit.tsx b/frontend/src/components/common/InlineEdit.tsx
index b5acb4a..d1677ce 100644
--- a/frontend/src/components/common/InlineEdit.tsx
+++ b/frontend/src/components/common/InlineEdit.tsx
@@ -87,7 +87,7 @@ export function InlineEdit({
       <button
         type="button"
         className={cn(
-          "cursor-pointer hover:bg-muted/50 rounded px-2 py-1 -mx-2 -my-1 transition-colors text-left w-full",
+          "cursor-pointer hover:bg-muted/50 rounded px-2 py-1 -mx-2 -my-1 transition-colors text-left w-full break-all",
           className
         )}
         onClick={(e) => {
diff --git a/frontend/src/components/sources/SourceCard.tsx b/frontend/src/components/sources/SourceCard.tsx
index 0adc5e0..48c4013 100644
--- a/frontend/src/components/sources/SourceCard.tsx
+++ b/frontend/src/components/sources/SourceCard.tsx
@@ -240,7 +240,7 @@ export function SourceCard({
             {/* Title */}
             <div className={cn('mb-1.5', !isCompleted && 'mb-1')}>
               <h4
-                className="text-sm font-medium leading-tight line-clamp-2"
+                className="text-sm font-medium leading-tight line-clamp-2 break-all"
                 title={title}
               >
                 {title}