fix(editor): add placeholder for input of database context menu (#11079)

fix: BS-2594

blocksuite/affine/components/src/context-menu/input.ts

@@ -110,6 +110,7 @@ export class MenuInput extends MenuFocusable {
         this.menu.setFocusOnly(this);
       }}"
       @input="${this.onInput}"
+      placeholder="${this.data.placeholder ?? ''}"
       @keydown="${this.onKeydown}"
       @copy="${this.stopPropagation}"
       @paste="${this.stopPropagation}"

blocksuite/affine/components/src/context-menu/menu-renderer.ts

@@ -204,7 +204,7 @@ export class MenuComponent
     }
     return html`
       <div
-        style="display:flex;align-items:center;gap: 4px;min-width: 300px;padding:3px 4px 3px 2px"
+        style="display:flex;align-items:center;gap: 4px;padding:3px 4px 3px 2px"
         @mouseenter="${() => this.menu.closeSubMenu()}"
       >
         ${title.onBack