Add WideClassicCard snippet and fix preview rendering

[chikoski]

This pull request has following changes:

• Add some snippets for WideClassicCard recipe.
• Fix a preview rendering issue

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• compose/snippets/src/main/java/com/example/compose/snippets/layouts/grid/NamedArea.kt:220, tag android_compose_layout_grid_area_ids
• compose/snippets/src/main/java/com/example/compose/snippets/layouts/grid/NamedArea.kt:232, tag android_compose_layout_grid_wide_classic_card_grid_config
• compose/snippets/src/main/java/com/example/compose/snippets/layouts/grid/NamedArea.kt:260, tag android_compose_layout_grid_wide_classic_card

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[gemini-code-assist]

Code Review

This pull request cleans up unused imports and updates previews in GridTrackSize.kt, while introducing a new WideClassicCard component, a CardArea enum, and a PreviewMediaQuery helper to NamedArea.kt to demonstrate responsive grid configurations. The code review feedback suggests improving the visual design of WideClassicCard by adding padding to its text elements to prevent clipping, and wrapping the global flag initialization in PreviewMediaQuery within a SideEffect block to properly handle side effects in Compose.

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