feat(web-admin): mobile-friendly OA money field for phone preview

Add decimal inputmode, taller touch targets under 768px, and wrapping uppercase; document phase-1 vs phase-2 mobile scope.

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/components/common/amount-input/index.vue

@@ -4,6 +4,7 @@
     :placeholder="placeholder"
     :disabled="disabled"
     :clearable="clearable"
+    :inputmode="inputmode"
     style="width: 100%"
     @focus="handleFocus"
     @blur="handleBlur"
@@ -29,6 +30,8 @@
     placeholder?: string
     disabled?: boolean
     clearable?: boolean
+    /** 移动端数字键盘提示，如 decimal；不传则不设置 */
+    inputmode?: string
   }
 
   const props = withDefaults(defineProps<Props>(), {
@@ -37,7 +40,8 @@
     precision: 2,
     placeholder: '',
     disabled: false,
-    clearable: true
+    clearable: true,
+    inputmode: undefined
   })
 
   const emit = defineEmits<{