feat: add Theme LiveView with preset switching
Implement basic theme editor interface with live preview: - ThemeLive.Index LiveView with mount and event handlers - Two-column layout: controls sidebar + preview area - Display all 9 presets as clickable buttons - Apply preset and regenerate CSS on click - Show current theme settings (mood, typography, shape, density, color) - Preview page switcher (7 pages: home, collection, product, cart, about, contact, 404) - Inline <style> tag with generated CSS for instant preview - Basic preview frame showing theme variables in action - Authentication required via :require_authenticated_user pipeline - Theme navigation link added to user menu - 9 comprehensive LiveView tests All tests passing (197 total). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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54
lib/simpleshop_theme_web/live/theme_live/index.ex
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54
lib/simpleshop_theme_web/live/theme_live/index.ex
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defmodule SimpleshopThemeWeb.ThemeLive.Index do
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use SimpleshopThemeWeb, :live_view
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alias SimpleshopTheme.Settings
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alias SimpleshopTheme.Theme.{CSSGenerator, Presets}
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@impl true
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def mount(_params, _session, socket) do
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theme_settings = Settings.get_theme_settings()
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generated_css = CSSGenerator.generate(theme_settings)
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socket =
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socket
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|> assign(:theme_settings, theme_settings)
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|> assign(:generated_css, generated_css)
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|> assign(:preview_page, :home)
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|> assign(:preset_names, Presets.list_names())
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{:ok, socket}
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end
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@impl true
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def handle_event("apply_preset", %{"preset" => preset_name}, socket) do
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preset_atom = String.to_existing_atom(preset_name)
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case Settings.apply_preset(preset_atom) do
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{:ok, theme_settings} ->
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generated_css = CSSGenerator.generate(theme_settings)
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socket =
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socket
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|> assign(:theme_settings, theme_settings)
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|> assign(:generated_css, generated_css)
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|> put_flash(:info, "Applied #{preset_name} preset")
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{:noreply, socket}
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{:error, _} ->
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{:noreply, put_flash(socket, :error, "Failed to apply preset")}
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end
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end
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@impl true
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def handle_event("change_preview_page", %{"page" => page_name}, socket) do
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page_atom = String.to_existing_atom(page_name)
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{:noreply, assign(socket, :preview_page, page_atom)}
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end
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@impl true
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def handle_event("save_theme", _params, socket) do
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socket = put_flash(socket, :info, "Theme saved successfully")
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{:noreply, socket}
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end
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end
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160
lib/simpleshop_theme_web/live/theme_live/index.html.heex
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160
lib/simpleshop_theme_web/live/theme_live/index.html.heex
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<div class="min-h-screen bg-base-200">
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<div class="navbar bg-base-100 shadow-sm">
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<div class="flex-1">
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<h1 class="text-xl font-bold px-4">Theme Editor</h1>
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</div>
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<div class="flex-none gap-2">
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<button
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type="button"
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phx-click="save_theme"
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class="btn btn-primary"
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>
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Save Theme
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</button>
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</div>
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</div>
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<div class="flex flex-col lg:flex-row">
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<!-- Controls Sidebar -->
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<div class="w-full lg:w-80 bg-base-100 p-6 shadow-lg overflow-y-auto lg:h-[calc(100vh-64px)]">
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<div class="space-y-6">
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<!-- Presets Section -->
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<div>
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<h2 class="text-lg font-semibold mb-4">Presets</h2>
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<div class="grid grid-cols-2 gap-2">
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<%= for preset_name <- @preset_names do %>
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<button
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type="button"
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phx-click="apply_preset"
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phx-value-preset={preset_name}
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class="btn btn-sm btn-outline capitalize"
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>
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<%= preset_name %>
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</button>
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<% end %>
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</div>
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</div>
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<!-- Current Settings Display -->
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<div class="divider"></div>
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<div>
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<h2 class="text-lg font-semibold mb-4">Current Settings</h2>
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<div class="space-y-2 text-sm">
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<div class="flex justify-between">
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<span class="font-medium">Mood:</span>
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<span class="capitalize"><%= @theme_settings.mood %></span>
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</div>
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<div class="flex justify-between">
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<span class="font-medium">Typography:</span>
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<span class="capitalize"><%= @theme_settings.typography %></span>
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</div>
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<div class="flex justify-between">
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<span class="font-medium">Shape:</span>
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<span class="capitalize"><%= @theme_settings.shape %></span>
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</div>
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<div class="flex justify-between">
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<span class="font-medium">Density:</span>
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<span class="capitalize"><%= @theme_settings.density %></span>
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</div>
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<div class="flex justify-between">
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<span class="font-medium">Accent Color:</span>
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<span>
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<span
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class="inline-block w-4 h-4 rounded-sm border border-base-300"
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style={"background-color: #{@theme_settings.accent_color}"}
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>
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</span>
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<%= @theme_settings.accent_color %>
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</span>
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</div>
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</div>
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</div>
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</div>
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</div>
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<!-- Preview Area -->
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<div class="flex-1 p-6">
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<div class="bg-base-100 rounded-lg shadow-xl overflow-hidden">
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<!-- Preview Page Switcher -->
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<div class="bg-base-200 p-4 border-b border-base-300">
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<div class="flex flex-wrap gap-2">
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<%= for {page_name, label} <- [
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{:home, "Home"},
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{:collection, "Collection"},
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{:pdp, "Product"},
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{:cart, "Cart"},
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{:about, "About"},
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{:contact, "Contact"},
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{:error, "404"}
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] do %>
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<button
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type="button"
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phx-click="change_preview_page"
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phx-value-page={page_name}
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class={[
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"btn btn-sm",
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if(@preview_page == page_name, do: "btn-primary", else: "btn-ghost")
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]}
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>
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<%= label %>
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</button>
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<% end %>
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</div>
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</div>
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<!-- Preview Frame -->
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<div class="preview-frame bg-white" style="min-height: 600px;">
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<style>
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<%= Phoenix.HTML.raw(@generated_css) %>
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</style>
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<div class="p-8 text-center">
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<h2 class="text-2xl font-bold mb-4" style="font-family: var(--t-font-heading); color: var(--t-text-primary);">
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Preview: <%= String.capitalize(to_string(@preview_page)) %>
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</h2>
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<div class="max-w-2xl mx-auto space-y-4">
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<p style="color: var(--t-text-secondary);">
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This is a preview of the <strong><%= @preview_page %></strong> page with your current theme settings.
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</p>
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<div class="flex gap-2 justify-center">
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<button
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class="px-4 py-2 rounded text-white font-medium"
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style="background-color: hsl(var(--t-accent-h) var(--t-accent-s) var(--t-accent-l)); border-radius: var(--t-radius-button);"
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>
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Primary Button
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</button>
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<button
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class="px-4 py-2 rounded font-medium"
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style="border: 2px solid var(--t-border-default); border-radius: var(--t-radius-button); color: var(--t-text-primary); background-color: var(--t-surface-base);"
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>
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Secondary Button
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</button>
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</div>
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<div
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class="p-6 rounded shadow-sm"
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style="background-color: var(--t-surface-raised); border-radius: var(--t-radius-card); border: 1px solid var(--t-border-default);"
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>
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<h3
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class="text-lg font-semibold mb-2"
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style="font-family: var(--t-font-heading); color: var(--t-text-primary);"
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>
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Card Example
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</h3>
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<p style="font-family: var(--t-font-body); color: var(--t-text-secondary);">
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This card demonstrates the current surface, border, and text colors with the selected shape style.
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</p>
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</div>
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<div class="text-sm" style="color: var(--t-text-tertiary);">
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Detailed preview pages coming in Phase 5
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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