[BarMal]

Summary

• Adds a CategoryDisplayMode enum (CARD_STACK / DYNAMIC_PAGES) stored in settings
• Card stack (default): existing behaviour — a single "Categories" spine page with a stacked card per category
• Dynamic pages: one spine page per enabled category that has app assignments, each showing that category's app stack directly
• Setting is exposed in Settings → Apps → Categories → "Category display"

Changes

• CategoryDisplayMode.kt — new enum
• CalmTheme.kt — adds CATEGORY_PAGE_KEY_PREFIX = "dev.barna.calm.CATEGORY."
• ChapterPage.kt — adds categoryPage(key, marker, title) factory
• LauncherUiPreferences.kt — adds categoryDisplayMode and enabledCategoriesForDynamicPages
• LauncherSettings.kt — getter/setter for categoryDisplayMode; computes enabledCategoriesForDynamicPages (enabled categories with ≥1 assignment)
• ChapterPagePlanner.kt — branches on categoryDisplayMode when building pages
• PageSlot.kt — slotOf() maps CATEGORY_PAGE_KEY_PREFIX keys to PageSlot.CATEGORIES
• LauncherPageFactory.kt — routes individual category page keys to createIndividualCategoryPage()
• CalmSettingsActivity.kt — adds "Category display" choice row in the Categories section
• ChapterPagePlannerTest.kt — 4 new tests covering dynamic pages mode

Test plan

• Dynamic pages mode adds one page per enabled category with assignments, slotted under CATEGORIES
• Dynamic pages mode with no categories adds no pages
• Card stack mode still adds the single folder page
• PageArranger.slotOf() returns CATEGORIES for both the folder key and individual category page keys
• Setting persists across restarts

https://claude.ai/code/session_014SVjLmSTdqY3hSCrK59YFV

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