(eslint): update config to handle ES modules and Odoo JSDoc tags

static/src/components/dynamic_placeholder_char_field/dynamic_placeholder_char_field.js

-/** @odoo-module */
-
 import {CharField, charField} from "@web/views/fields/char/char_field";
 import {patch} from "@web/core/utils/patch";
 
 // Adding a new property for dynamic placeholder button visibility
 CharField.props = {
     ...CharField.props,
@@ -3,10 +1,10 @@
 import {CharField, charField} from "@web/views/fields/char/char_field";
 import {patch} from "@web/core/utils/patch";
 
 // Adding a new property for dynamic placeholder button visibility
 CharField.props = {
     ...CharField.props,
-    rednerDynamicPlaceholder: {type: Boolean, optional: true}, // Dynamic placeholder flag
+    rednerDynamicPlaceholder: {type: Boolean, optional: true},
     buttonVisibilityField: {type: String, optional: true},
     converterField: {type: String, optional: true},
 };
@@ -47,9 +45,9 @@
             this.input.el.focus();
 
             // Build placeholder based on converter type
-            let placeholder;
+            let placeholder = "";
             switch (this.activeConverterType) {
                 case "field":
                     placeholder = `${chain}`;
                     break;
                 // Add other converter types here
@@ -51,11 +49,11 @@
             switch (this.activeConverterType) {
                 case "field":
                     placeholder = `${chain}`;
                     break;
                 // Add other converter types here
-                default:
+                default: {
                     const defaultValuePart = defaultValue?.length
                         ? ` ||| ${defaultValue}`
                         : "";
                     placeholder = `{{object.${chain}${defaultValuePart}}}`;
                     break;
@@ -57,8 +55,9 @@
                     const defaultValuePart = defaultValue?.length
                         ? ` ||| ${defaultValue}`
                         : "";
                     placeholder = `{{object.${chain}${defaultValuePart}}}`;
                     break;
+                }
             }
             this.input.el.setRangeText(
                 placeholder,
@@ -66,7 +65,7 @@
                 this.selectionStart,
                 "end"
             );
-            // trigger events to make the field dirty
+            // Trigger events to make the field dirty
             this.input.el.dispatchEvent(new InputEvent("input"));
             this.input.el.dispatchEvent(new KeyboardEvent("keydown"));
             this.input.el.focus();