fix(ui): add openOnClick prop to Combobox for reliable dropdown opening (#1795)

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Co-authored-by: leiyutian <leiyutian@echo.tech>
Co-authored-by-agent: Claude Opus 4.7 <noreply@anthropic.com>

docs/ai/context/ui-components.md

@@ -379,6 +379,7 @@ Searchable dropdown/autocomplete using reka-ui with grouping.
 | `options` | `ComboboxOptionItem<T>[] \| ComboboxOptionGroupItem<T>[]` | *(required)* | Options |
 | `placeholder` | `string?` | — | Placeholder |
 | `disabled` | `boolean?` | `false` | Disabled |
+| `openOnClick` | `boolean?` | `true` | Auto-open dropdown on click |
 | `contentMinWidth` | `string \| number?` | — | Dropdown min width |
 | `contentWidth` | `string \| number?` | — | Dropdown width |
 
@@ -394,6 +395,7 @@ Simplified Combobox wrapper for string/number options.
 | `options` | `{ label, value, description?, disabled?, icon? }[]?` | — | Options |
 | `placeholder` | `string?` | — | Placeholder |
 | `disabled` | `boolean?` | `false` | Disabled |
+| `openOnClick` | `boolean?` | `true` | Auto-open dropdown on click |
 | `title` | `string?` | — | Title |
 | `layout` | `'horizontal' \| 'vertical'?` | — | Layout direction |
 | `contentMinWidth` | `string \| number?` | — | Dropdown min width |
@@ -527,6 +529,7 @@ All Field components wrap a base input with `label`, `description`, and consiste
 | `options` | `{ label, value, description?, disabled?, icon? }[]?` | — | Options |
 | `placeholder` | `string?` | — | Placeholder |
 | `disabled` | `boolean?` | `false` | Disabled |
+| `openOnClick` | `boolean?` | `true` | Auto-open dropdown on click |
 | `layout` | `'horizontal' \| 'vertical'` | `'horizontal'` | Layout |
 
 **v-model**: `modelValue: string`