implement unified on-site editor phases 1-2

Add theme editing to the existing PageEditorHook, enabling on-site
theme customisation alongside page editing. The editor panel now has
three tabs (Page, Theme, Settings) and can be collapsed while
keeping editing state intact.

- Add theme editing state and event handlers to PageEditorHook
- Add 3-tab UI with tab switching logic
- Add transparent overlay for click-outside dismiss
- Add mobile drag-to-resize with height persistence
- Fix animation replay on drag release (has-dragged class)
- Preserve panel height across LiveView re-renders
- Default to Page tab on editable pages, Theme otherwise
- Show unsaved changes indicator on FAB when panel collapsed
- Fix handle_event grouping warning in admin theme

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/berrypod_web/components/shop_components/layout.ex

@@ -48,10 +48,11 @@ defmodule BerrypodWeb.ShopComponents.Layout do
 
   # Keys accepted by shop_layout — used by layout_assigns/1 so page templates
   # can spread assigns without listing each one explicitly.
-  @layout_keys ~w(theme_settings site_name logo_image header_image mode cart_items cart_count
+  @layout_keys ~w(theme_settings generated_css site_name logo_image header_image mode cart_items cart_count
     cart_subtotal cart_total cart_drawer_open cart_status active_page error_page is_admin
     search_query search_results search_open categories shipping_estimate
-    country_code available_countries editing editor_current_path editor_sidebar_open
+    country_code available_countries editing theme_editing editor_current_path editor_sidebar_open
+    editor_active_tab editor_sheet_state editor_dirty editor_save_status
     header_nav_items footer_nav_items newsletter_enabled newsletter_state stripe_connected)a
 
   @doc """
@@ -102,6 +103,7 @@ defmodule BerrypodWeb.ShopComponents.Layout do
   attr :newsletter_enabled, :boolean, default: false
   attr :newsletter_state, :atom, default: :idle
   attr :stripe_connected, :boolean, default: true
+  attr :generated_css, :string, default: nil
 
   slot :inner_block, required: true
 
@@ -110,9 +112,24 @@ defmodule BerrypodWeb.ShopComponents.Layout do
     <div
       id={unless @error_page, do: "shop-container"}
       phx-hook={unless @error_page, do: "CartPersist"}
-      class="shop-container"
+      class="shop-container themed"
       data-bottom-nav={!@error_page || nil}
+      data-mood={@theme_settings.mood}
+      data-typography={@theme_settings.typography}
+      data-shape={@theme_settings.shape}
+      data-density={@theme_settings.density}
+      data-grid={@theme_settings.grid_columns}
+      data-header={@theme_settings.header_layout}
+      data-sticky={to_string(@theme_settings.sticky_header)}
+      data-layout={@theme_settings.layout_width}
+      data-shadow={@theme_settings.card_shadow}
+      data-button-style={@theme_settings.button_style}
     >
+      <%!-- Live-updatable theme CSS (overrides static version in head) --%>
+      <%= if @generated_css do %>
+        {Phoenix.HTML.raw("<style id=\"theme-css-live\">#{@generated_css}</style>")}
+      <% end %>
+
       <.skip_link />
 
       <%= if @theme_settings.announcement_bar do %>
@@ -1032,7 +1049,7 @@ defmodule BerrypodWeb.ShopComponents.Layout do
   # ── Editor sheet ────────────────────────────────────────────────────
 
   @doc """
-  Renders the unified editor sheet for page editing.
+  Renders the unified editor sheet for page/theme/settings editing.
 
   The sheet is anchored to the bottom edge on mobile (<768px) and the right edge
   on desktop (≥768px). It has three states on mobile (collapsed, partial, full)
@@ -1040,59 +1057,98 @@ defmodule BerrypodWeb.ShopComponents.Layout do
 
   ## Attributes
 
-  * `editing` - Whether edit mode is active.
-  * `editor_dirty` - Whether there are unsaved changes.
+  * `editing` - Whether page edit mode is active.
+  * `theme_editing` - Whether theme edit mode is active.
+  * `editor_dirty` - Whether there are unsaved page changes.
   * `editor_sheet_state` - Current state (:collapsed, :partial, :full, or :open).
+  * `editor_active_tab` - Current tab (:page, :theme, :settings).
+  * `has_editable_page` - Whether the current page has editable blocks.
 
   ## Slots
 
   * `inner_block` - The editor content (block list, settings, etc.).
   """
   attr :editing, :boolean, default: false
+  attr :theme_editing, :boolean, default: false
   attr :editor_dirty, :boolean, default: false
   attr :editor_sheet_state, :atom, default: :collapsed
   attr :editor_save_status, :atom, default: :idle
+  attr :editor_active_tab, :atom, default: :page
+  attr :has_editable_page, :boolean, default: false
 
   slot :inner_block
 
   def editor_sheet(assigns) do
+    # Determine panel title based on active tab
+    title =
+      case assigns.editor_active_tab do
+        :page -> "Page"
+        :theme -> "Theme"
+        :settings -> "Settings"
+      end
+
+    # Any editing mode active
+    any_editing = assigns.editing || assigns.theme_editing
+
+    assigns =
+      assigns
+      |> assign(:title, title)
+      |> assign(:any_editing, any_editing)
+
     ~H"""
     <%!-- Floating action button: always visible when panel is closed --%>
     <button
       :if={@editor_sheet_state == :collapsed}
       type="button"
-      phx-click={if @editing, do: "editor_set_sheet_state", else: "editor_toggle_editing"}
-      phx-value-state={if @editing, do: "open", else: nil}
+      phx-click={if @any_editing, do: "editor_set_sheet_state", else: "editor_set_tab"}
+      phx-value-state={if @any_editing, do: "open", else: nil}
+      phx-value-tab={
+        if @any_editing, do: nil, else: if(@has_editable_page, do: "page", else: "theme")
+      }
       class="editor-fab"
-      aria-label={if @editing, do: "Show editor", else: "Edit page"}
+      aria-label={if @any_editing, do: "Show editor", else: "Edit"}
     >
       <.edit_pencil_svg />
-      <span>{if @editing, do: "Show editor", else: "Edit page"}</span>
+      <span>{if @any_editing, do: "Show editor", else: "Edit"}</span>
       <span :if={@editing && @editor_dirty} class="editor-fab-dirty" aria-label="Unsaved changes" />
     </button>
 
+    <%!-- Overlay to catch taps outside the panel --%>
+    <div
+      :if={@editor_sheet_state == :open}
+      class="editor-overlay"
+      phx-click="editor_set_sheet_state"
+      phx-value-state="collapsed"
+      aria-hidden="true"
+    />
+
     <%!-- Editor panel: slides in/out --%>
     <aside
       id="editor-panel"
       class="editor-panel"
       role="region"
-      aria-label="Page editor"
+      aria-label="Site editor"
       aria-hidden={to_string(@editor_sheet_state == :collapsed)}
       data-state={@editor_sheet_state}
-      data-editing={to_string(@editing)}
+      data-editing={to_string(@any_editing)}
       phx-hook="EditorSheet"
     >
+      <%!-- Drag handle for mobile resizing --%>
+      <div class="editor-panel-drag-handle" data-drag-handle>
+        <div class="editor-panel-drag-handle-bar" />
+      </div>
+
       <div class="editor-panel-header">
         <div class="editor-panel-header-left">
-          <span class="editor-panel-title">Page editor</span>
-          <span :if={@editor_dirty} class="editor-panel-dirty" aria-live="polite">
+          <span class="editor-panel-title">{@title}</span>
+          <span :if={@editing && @editor_dirty} class="editor-panel-dirty" aria-live="polite">
             <span class="editor-panel-dirty-dot" aria-hidden="true" />
             <span>Unsaved</span>
           </span>
         </div>
         <div class="editor-panel-header-actions">
           <button
-            :if={@editor_save_status == :saved}
+            :if={@editor_active_tab == :page && @editor_save_status == :saved}
             type="button"
             class="admin-btn admin-btn-sm admin-btn-ghost"
             disabled
@@ -1100,7 +1156,7 @@ defmodule BerrypodWeb.ShopComponents.Layout do
             Saved ✓
           </button>
           <button
-            :if={@editor_save_status != :saved}
+            :if={@editor_active_tab == :page && @editor_save_status != :saved}
             type="button"
             phx-click="editor_save"
             class={["admin-btn admin-btn-sm", @editor_dirty && "admin-btn-primary"]}
@@ -1108,9 +1164,66 @@ defmodule BerrypodWeb.ShopComponents.Layout do
           >
             Save
           </button>
+          <button
+            type="button"
+            phx-click="editor_set_sheet_state"
+            phx-value-state="collapsed"
+            class="editor-panel-close"
+            aria-label="Close editor"
+          >
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              fill="none"
+              viewBox="0 0 24 24"
+              stroke-width="2"
+              stroke="currentColor"
+              width="20"
+              height="20"
+            >
+              <path stroke-linecap="round" stroke-linejoin="round" d="M6 18 18 6M6 6l12 12" />
+            </svg>
+          </button>
         </div>
       </div>
 
+      <%!-- Tab bar --%>
+      <div class="editor-tabs" role="tablist">
+        <button
+          type="button"
+          role="tab"
+          phx-click="editor_set_tab"
+          phx-value-tab="page"
+          class={["editor-tab", @editor_active_tab == :page && "editor-tab-active"]}
+          aria-selected={to_string(@editor_active_tab == :page)}
+          disabled={!@has_editable_page}
+          title={
+            if @has_editable_page, do: "Edit page blocks", else: "This page has no editable blocks"
+          }
+        >
+          Page
+        </button>
+        <button
+          type="button"
+          role="tab"
+          phx-click="editor_set_tab"
+          phx-value-tab="theme"
+          class={["editor-tab", @editor_active_tab == :theme && "editor-tab-active"]}
+          aria-selected={to_string(@editor_active_tab == :theme)}
+        >
+          Theme
+        </button>
+        <button
+          type="button"
+          role="tab"
+          phx-click="editor_set_tab"
+          phx-value-tab="settings"
+          class={["editor-tab", @editor_active_tab == :settings && "editor-tab-active"]}
+          aria-selected={to_string(@editor_active_tab == :settings)}
+        >
+          Settings
+        </button>
+      </div>
+
       <div class="editor-panel-content">
         {render_slot(@inner_block)}
       </div>

lib/berrypod_web/live/admin/theme/index.ex

@@ -326,10 +326,6 @@ defmodule BerrypodWeb.Admin.Theme.Index do
     end
   end
 
-  defp has_valid_logo?(socket) do
-    socket.assigns.theme_settings.show_logo && socket.assigns.logo_image != nil
-  end
-
   @impl true
   def handle_event("save_theme", _params, socket) do
     socket = put_flash(socket, :info, "Theme saved successfully")
@@ -452,6 +448,10 @@ defmodule BerrypodWeb.Admin.Theme.Index do
     {:noreply, socket}
   end
 
+  defp has_valid_logo?(socket) do
+    socket.assigns.theme_settings.show_logo && socket.assigns.logo_image != nil
+  end
+
   def error_to_string(:too_large), do: "File is too large"
   def error_to_string(:too_many_files), do: "Too many files"
   def error_to_string(:not_accepted), do: "File type not accepted"

lib/berrypod_web/live/admin/theme/index.html.heex

@@ -330,8 +330,7 @@
         <div class="theme-subfield">
           <form phx-change="update_setting" phx-value-field="favicon_short_name">
             <label class="theme-slider-label theme-block-label">
-              Short name
-              <span class="admin-text-tertiary">— appears under home screen icon</span>
+              Short name <span class="admin-text-tertiary">— appears under home screen icon</span>
             </label>
             <input
               type="text"
@@ -441,7 +440,7 @@
                 </div>
               </div>
             <% end %>
-
+            
 <!-- Header Image Controls -->
             <div class="admin-stack admin-stack-md theme-subfield">
               <form phx-change="update_setting" phx-value-field="header_zoom">
@@ -521,7 +520,7 @@
           <% end %>
         </div>
       <% end %>
-
+      
 <!-- Presets Section -->
       <div class="theme-section">
         <label class="theme-section-label">Start with a preset</label>

lib/berrypod_web/page_editor_hook.ex

@@ -1,13 +1,15 @@
 defmodule BerrypodWeb.PageEditorHook do
   @moduledoc """
-  LiveView on_mount hook for the live page editor sidebar.
+  LiveView on_mount hook for the unified on-site editor.
 
   Mounted in the public_shop live_session. When an admin visits any shop
-  page with `?edit=true` in the URL, this hook activates editing mode:
-  loads a working copy of the page's blocks, attaches event handlers for
-  block manipulation, and sets assigns that trigger the editor sidebar
-  in `PageRenderer.render_page/1`.
+  page, this hook enables editing capabilities:
 
+  1. **Page editing** — loads a working copy of the page's blocks, attaches
+     event handlers for block manipulation
+  2. **Theme editing** — provides live theme customisation on the actual shop
+
+  The hook manages a tabbed editor panel with Page, Theme, and Settings tabs.
   Non-admin users are unaffected — the hook just assigns `editing: false`.
 
   ## Actions
@@ -18,12 +20,15 @@ defmodule BerrypodWeb.PageEditorHook do
   import Phoenix.Component, only: [assign: 3]
   import Phoenix.LiveView, only: [attach_hook: 4, push_navigate: 2]
 
+  alias Berrypod.{Media, Settings}
   alias Berrypod.Pages
   alias Berrypod.Pages.{BlockEditor, BlockTypes, Defaults}
+  alias Berrypod.Theme.{Contrast, CSSGenerator, Presets}
 
   def on_mount(:mount_page_editor, _params, _session, socket) do
     socket =
       socket
+      # Page editing state
       |> assign(:editing, false)
       |> assign(:editing_blocks, nil)
       |> assign(:editor_dirty, false)
@@ -43,6 +48,18 @@ defmodule BerrypodWeb.PageEditorHook do
       |> assign(:editor_image_picker_images, [])
       |> assign(:editor_image_picker_search, "")
       |> assign(:editor_save_status, :idle)
+      # Unified editor tab state (:page | :theme | :settings)
+      |> assign(:editor_active_tab, :page)
+      # Theme editing state
+      |> assign(:theme_editing, false)
+      |> assign(:theme_editor_settings, nil)
+      |> assign(:theme_editor_active_preset, nil)
+      |> assign(:theme_editor_logo_image, nil)
+      |> assign(:theme_editor_header_image, nil)
+      |> assign(:theme_editor_icon_image, nil)
+      |> assign(:theme_editor_contrast_warning, :ok)
+      |> assign(:theme_editor_customise_open, false)
+      |> assign(:theme_editor_presets, Presets.all_with_descriptions())
       |> attach_hook(:editor_params, :handle_params, &handle_editor_params/3)
       |> attach_hook(:editor_events, :handle_event, &handle_editor_event/3)
       |> attach_hook(:editor_info, :handle_info, &handle_editor_info/2)
@@ -84,7 +101,7 @@ defmodule BerrypodWeb.PageEditorHook do
 
   # set_sheet_state can be called even when not editing (from JS click-outside)
   defp handle_editor_event("editor_set_sheet_state", %{"state" => state_str}, socket) do
-    if socket.assigns.is_admin and socket.assigns[:page] do
+    if socket.assigns.is_admin do
       state = if state_str == "open", do: :open, else: :collapsed
       {:halt, assign(socket, :editor_sheet_state, state)}
     else
@@ -92,6 +109,62 @@ defmodule BerrypodWeb.PageEditorHook do
     end
   end
 
+  # Tab switching for unified editor
+  defp handle_editor_event("editor_set_tab", %{"tab" => tab_str}, socket) do
+    if socket.assigns.is_admin do
+      tab = String.to_existing_atom(tab_str)
+
+      socket =
+        case tab do
+          :theme ->
+            # Load theme state if not already loaded
+            if socket.assigns.theme_editing do
+              assign(socket, :editor_active_tab, :theme)
+            else
+              enter_theme_edit_mode(socket)
+            end
+
+          :page ->
+            # Enter page edit mode if we have a page and aren't already editing
+            socket = assign(socket, :editor_active_tab, :page)
+
+            if socket.assigns[:page] && !socket.assigns.editing do
+              enter_edit_mode(socket)
+            else
+              socket
+            end
+
+          :settings ->
+            # Ensure theme state is loaded for settings that need it
+            socket =
+              if socket.assigns.theme_editing do
+                socket
+              else
+                load_theme_state(socket)
+              end
+
+            assign(socket, :editor_active_tab, :settings)
+        end
+
+      {:halt, socket}
+    else
+      {:cont, socket}
+    end
+  end
+
+  # Toggle theme editing mode
+  defp handle_editor_event("editor_toggle_theme", _params, socket) do
+    if socket.assigns.is_admin do
+      if socket.assigns.theme_editing do
+        {:halt, exit_theme_edit_mode(socket)}
+      else
+        {:halt, enter_theme_edit_mode(socket)}
+      end
+    else
+      {:cont, socket}
+    end
+  end
+
   defp handle_editor_event("editor_" <> action, params, socket) do
     if socket.assigns.editing do
       handle_editor_action(action, params, socket)
@@ -100,6 +173,15 @@ defmodule BerrypodWeb.PageEditorHook do
     end
   end
 
+  # Theme editing events
+  defp handle_editor_event("theme_" <> action, params, socket) do
+    if socket.assigns.is_admin && socket.assigns.theme_editing do
+      handle_theme_action(action, params, socket)
+    else
+      {:cont, socket}
+    end
+  end
+
   defp handle_editor_event(_event, _params, socket), do: {:cont, socket}
 
   # ── Block manipulation actions ───────────────────────────────────
@@ -417,6 +499,200 @@ defmodule BerrypodWeb.PageEditorHook do
   # Catch-all for unknown editor actions
   defp handle_editor_action(_action, _params, socket), do: {:halt, socket}
 
+  # ── Theme editing actions ───────────────────────────────────────────
+
+  # Settings stored outside the theme JSON (site_name, site_description)
+  @standalone_settings ~w(site_name site_description)
+
+  defp handle_theme_action("apply_preset", %{"preset" => preset_name}, socket) do
+    preset_atom = String.to_existing_atom(preset_name)
+
+    case Settings.apply_preset(preset_atom) do
+      {:ok, theme_settings} ->
+        generated_css =
+          CSSGenerator.generate(theme_settings, &BerrypodWeb.Endpoint.static_path/1)
+
+        header_image = socket.assigns.theme_editor_header_image
+        contrast_warning = compute_header_contrast(theme_settings, header_image)
+
+        socket =
+          socket
+          # Update editor state
+          |> assign(:theme_editor_settings, theme_settings)
+          |> assign(:theme_editor_active_preset, preset_atom)
+          |> assign(:theme_editor_contrast_warning, contrast_warning)
+          # Update shop state so layout reflects changes live
+          |> assign(:theme_settings, theme_settings)
+          |> assign(:generated_css, generated_css)
+
+        {:halt, socket}
+
+      {:error, _} ->
+        {:halt, socket}
+    end
+  end
+
+  defp handle_theme_action(
+         "update_setting",
+         %{"field" => field, "setting_value" => value},
+         socket
+       )
+       when field in @standalone_settings do
+    Settings.put_setting(field, value, "string")
+    # Also update the main assigns so ThemeHook sees the change
+    {:halt, assign(socket, String.to_existing_atom(field), value)}
+  end
+
+  defp handle_theme_action(
+         "update_setting",
+         %{"field" => field, "setting_value" => value},
+         socket
+       ) do
+    field_atom = String.to_existing_atom(field)
+    update_theme_setting(socket, %{field_atom => value}, field)
+  end
+
+  defp handle_theme_action("update_setting", %{"field" => field} = params, socket)
+       when field in @standalone_settings do
+    value = params[field]
+
+    if value do
+      Settings.put_setting(field, value, "string")
+      {:halt, assign(socket, String.to_existing_atom(field), value)}
+    else
+      {:halt, socket}
+    end
+  end
+
+  defp handle_theme_action("update_setting", %{"field" => field} = params, socket) do
+    value = params[field] || params["#{field}_text"] || params["value"]
+
+    if value do
+      field_atom = String.to_existing_atom(field)
+      update_theme_setting(socket, %{field_atom => value}, field)
+    else
+      {:halt, socket}
+    end
+  end
+
+  defp handle_theme_action("update_color", %{"field" => field, "value" => value}, socket) do
+    field_atom = String.to_existing_atom(field)
+    update_theme_setting(socket, %{field_atom => value}, field)
+  end
+
+  defp handle_theme_action("toggle_setting", %{"field" => field}, socket) do
+    field_atom = String.to_existing_atom(field)
+    current_value = Map.get(socket.assigns.theme_editor_settings, field_atom)
+    new_value = !current_value
+
+    # Prevent turning off show_site_name when there's no logo
+    if field_atom == :show_site_name && new_value == false && !has_valid_logo?(socket) do
+      {:halt, socket}
+    else
+      update_theme_setting(socket, %{field_atom => new_value}, field)
+    end
+  end
+
+  defp handle_theme_action("toggle_customise", _params, socket) do
+    {:halt,
+     assign(socket, :theme_editor_customise_open, !socket.assigns.theme_editor_customise_open)}
+  end
+
+  defp handle_theme_action("remove_logo", _params, socket) do
+    if logo = socket.assigns.theme_editor_logo_image do
+      Media.delete_image(logo)
+    end
+
+    {:ok, theme_settings} =
+      Settings.update_theme_settings(%{logo_image_id: nil, show_site_name: true})
+
+    generated_css = CSSGenerator.generate(theme_settings)
+
+    socket =
+      socket
+      |> assign(:theme_editor_logo_image, nil)
+      |> assign(:logo_image, nil)
+      |> assign(:theme_editor_settings, theme_settings)
+      |> assign(:generated_css, generated_css)
+
+    {:halt, socket}
+  end
+
+  defp handle_theme_action("remove_header", _params, socket) do
+    if header = socket.assigns.theme_editor_header_image do
+      Media.delete_image(header)
+    end
+
+    Settings.update_theme_settings(%{header_image_id: nil})
+
+    socket =
+      socket
+      |> assign(:theme_editor_header_image, nil)
+      |> assign(:header_image, nil)
+      |> assign(:theme_editor_contrast_warning, :ok)
+
+    {:halt, socket}
+  end
+
+  defp handle_theme_action("remove_icon", _params, socket) do
+    if icon = socket.assigns.theme_editor_icon_image do
+      Media.delete_image(icon)
+    end
+
+    Settings.update_theme_settings(%{icon_image_id: nil})
+
+    socket =
+      socket
+      |> assign(:theme_editor_icon_image, nil)
+      |> assign(:icon_image, nil)
+
+    {:halt, socket}
+  end
+
+  # Catch-all for unknown theme actions
+  defp handle_theme_action(_action, _params, socket), do: {:halt, socket}
+
+  # Helper to update a theme setting and regenerate CSS
+  defp update_theme_setting(socket, attrs, field) do
+    case Settings.update_theme_settings(attrs) do
+      {:ok, theme_settings} ->
+        generated_css =
+          CSSGenerator.generate(theme_settings, &BerrypodWeb.Endpoint.static_path/1)
+
+        active_preset = Presets.detect_preset(theme_settings)
+
+        socket =
+          socket
+          # Update editor state
+          |> assign(:theme_editor_settings, theme_settings)
+          |> assign(:theme_editor_active_preset, active_preset)
+          |> maybe_recompute_contrast(field)
+          # Update shop state so layout reflects changes live
+          |> assign(:theme_settings, theme_settings)
+          |> assign(:generated_css, generated_css)
+
+        {:halt, socket}
+
+      {:error, _} ->
+        {:halt, socket}
+    end
+  end
+
+  defp maybe_recompute_contrast(socket, field)
+       when field in ["mood", "header_background_enabled"] do
+    header_image = socket.assigns.theme_editor_header_image
+    theme_settings = socket.assigns.theme_editor_settings
+    contrast_warning = compute_header_contrast(theme_settings, header_image)
+    assign(socket, :theme_editor_contrast_warning, contrast_warning)
+  end
+
+  defp maybe_recompute_contrast(socket, _field), do: socket
+
+  defp has_valid_logo?(socket) do
+    socket.assigns.theme_editor_settings.show_logo &&
+      socket.assigns.theme_editor_logo_image != nil
+  end
+
   # ── Private helpers ──────────────────────────────────────────────
 
   defp enter_edit_mode(socket) do
@@ -458,7 +734,6 @@ defmodule BerrypodWeb.PageEditorHook do
     |> assign(:editor_allowed_blocks, nil)
     |> assign(:editor_live_region_message, nil)
     |> assign(:editor_sidebar_open, true)
-    |> assign(:editor_sheet_state, :collapsed)
     |> assign(:editor_image_picker_block_id, nil)
     |> assign(:editor_image_picker_field_key, nil)
     |> assign(:editor_image_picker_images, [])
@@ -491,4 +766,61 @@ defmodule BerrypodWeb.PageEditorHook do
     extra = Pages.load_block_data(blocks, socket.assigns)
     Enum.reduce(extra, socket, fn {key, value}, acc -> assign(acc, key, value) end)
   end
+
+  # ── Theme editing helpers ───────────────────────────────────────────
+
+  # Load theme state without changing tabs (for settings tab that needs theme data)
+  defp load_theme_state(socket) do
+    theme_settings = Settings.get_theme_settings()
+
+    generated_css =
+      CSSGenerator.generate(theme_settings, &BerrypodWeb.Endpoint.static_path/1)
+
+    active_preset = Presets.detect_preset(theme_settings)
+
+    logo_image = Media.get_logo()
+    header_image = Media.get_header()
+    icon_image = Media.get_icon()
+
+    contrast_warning = compute_header_contrast(theme_settings, header_image)
+
+    socket
+    |> assign(:theme_editing, true)
+    |> assign(:theme_editor_settings, theme_settings)
+    |> assign(:theme_editor_active_preset, active_preset)
+    |> assign(:theme_editor_logo_image, logo_image)
+    |> assign(:theme_editor_header_image, header_image)
+    |> assign(:theme_editor_icon_image, icon_image)
+    |> assign(:theme_editor_contrast_warning, contrast_warning)
+    |> assign(:theme_editor_customise_open, false)
+    # Update both editor and shop state
+    |> assign(:theme_settings, theme_settings)
+    |> assign(:generated_css, generated_css)
+    |> assign(:editor_sheet_state, :open)
+  end
+
+  defp enter_theme_edit_mode(socket) do
+    socket
+    |> load_theme_state()
+    |> assign(:editor_active_tab, :theme)
+  end
+
+  defp exit_theme_edit_mode(socket) do
+    socket
+    |> assign(:theme_editing, false)
+    |> assign(:theme_editor_settings, nil)
+    |> assign(:theme_editor_active_preset, nil)
+    |> assign(:theme_editor_contrast_warning, :ok)
+    |> assign(:theme_editor_customise_open, false)
+  end
+
+  defp compute_header_contrast(theme_settings, header_image) do
+    if theme_settings.header_background_enabled && header_image do
+      text_color = Contrast.text_color_for_mood(theme_settings.mood)
+      colors = Contrast.parse_dominant_colors(header_image.dominant_colors)
+      Contrast.analyze_header_contrast(colors, text_color)
+    else
+      :ok
+    end
+  end
 end

lib/berrypod_web/page_renderer.ex

@@ -81,14 +81,18 @@ defmodule BerrypodWeb.PageRenderer do
       </main>
     </.shop_layout>
 
-    <%!-- Editor sheet for page editing --%>
+    <%!-- Editor sheet for page/theme/settings editing --%>
     <.editor_sheet
       editing={@editing}
+      theme_editing={Map.get(assigns, :theme_editing, false)}
       editor_dirty={@editor_dirty}
       editor_sheet_state={assigns[:editor_sheet_state] || :collapsed}
       editor_save_status={@editor_save_status}
+      editor_active_tab={Map.get(assigns, :editor_active_tab, :page)}
+      has_editable_page={@page != nil}
     >
-      <.editor_sheet_content
+      <.editor_panel_content
+        editor_active_tab={Map.get(assigns, :editor_active_tab, :page)}
         page={@page}
         editing_blocks={@editing_blocks}
         editor_history={@editor_history}
@@ -103,13 +107,247 @@ defmodule BerrypodWeb.PageRenderer do
         editor_image_picker_images={@editor_image_picker_images}
         editor_image_picker_search={@editor_image_picker_search}
         editor_at_defaults={Map.get(assigns, :editor_at_defaults, true)}
+        theme_editor_settings={Map.get(assigns, :theme_editor_settings)}
+        theme_editor_active_preset={Map.get(assigns, :theme_editor_active_preset)}
+        theme_editor_presets={Map.get(assigns, :theme_editor_presets, [])}
+        theme_editor_customise_open={Map.get(assigns, :theme_editor_customise_open, false)}
+        site_name={Map.get(assigns, :site_name, "")}
       />
     </.editor_sheet>
     """
   end
 
+  # Editor panel content dispatcher - shows content based on active tab
+  attr :editor_active_tab, :atom, default: :page
+  attr :page, :map, default: nil
+  attr :editing_blocks, :list, default: nil
+  attr :editor_history, :list, default: []
+  attr :editor_future, :list, default: []
+  attr :editor_dirty, :boolean, default: false
+  attr :editor_live_region_message, :string, default: nil
+  attr :editor_expanded, :any, default: nil
+  attr :editor_show_picker, :boolean, default: false
+  attr :editor_picker_filter, :string, default: ""
+  attr :editor_allowed_blocks, :list, default: nil
+  attr :editor_image_picker_block_id, :string, default: nil
+  attr :editor_image_picker_images, :list, default: []
+  attr :editor_image_picker_search, :string, default: ""
+  attr :editor_at_defaults, :boolean, default: true
+  attr :theme_editor_settings, :map, default: nil
+  attr :theme_editor_active_preset, :atom, default: nil
+  attr :theme_editor_presets, :list, default: []
+  attr :theme_editor_customise_open, :boolean, default: false
+  attr :site_name, :string, default: ""
+
+  defp editor_panel_content(%{editor_active_tab: :page} = assigns) do
+    ~H"""
+    <.editor_sheet_content
+      page={@page}
+      editing_blocks={@editing_blocks}
+      editor_history={@editor_history}
+      editor_future={@editor_future}
+      editor_dirty={@editor_dirty}
+      editor_live_region_message={@editor_live_region_message}
+      editor_expanded={@editor_expanded}
+      editor_show_picker={@editor_show_picker}
+      editor_picker_filter={@editor_picker_filter}
+      editor_allowed_blocks={@editor_allowed_blocks}
+      editor_image_picker_block_id={@editor_image_picker_block_id}
+      editor_image_picker_images={@editor_image_picker_images}
+      editor_image_picker_search={@editor_image_picker_search}
+      editor_at_defaults={@editor_at_defaults}
+    />
+    """
+  end
+
+  defp editor_panel_content(%{editor_active_tab: :theme} = assigns) do
+    ~H"""
+    <.theme_editor_content
+      theme_editor_settings={@theme_editor_settings}
+      theme_editor_active_preset={@theme_editor_active_preset}
+      theme_editor_presets={@theme_editor_presets}
+      theme_editor_customise_open={@theme_editor_customise_open}
+      site_name={@site_name}
+    />
+    """
+  end
+
+  defp editor_panel_content(%{editor_active_tab: :settings} = assigns) do
+    ~H"""
+    <.settings_editor_content page={@page} site_name={@site_name} />
+    """
+  end
+
+  # Theme editor content - shows theme controls
+  attr :theme_editor_settings, :map, default: nil
+  attr :theme_editor_active_preset, :atom, default: nil
+  attr :theme_editor_presets, :list, default: []
+  attr :theme_editor_customise_open, :boolean, default: false
+  attr :site_name, :string, default: ""
+
+  defp theme_editor_content(assigns) do
+    ~H"""
+    <div class="editor-theme-content">
+      <%= if @theme_editor_settings do %>
+        <%!-- Shop name --%>
+        <div class="theme-section">
+          <label class="theme-section-label">Shop name</label>
+          <form phx-change="theme_update_setting" phx-value-field="site_name">
+            <input
+              type="text"
+              name="site_name"
+              value={@site_name}
+              placeholder="Your shop name"
+              class="admin-input"
+            />
+          </form>
+        </div>
+
+        <%!-- Presets --%>
+        <div class="theme-section">
+          <label class="theme-section-label">Preset</label>
+          <div class="theme-presets">
+            <%= for {preset_name, description} <- @theme_editor_presets do %>
+              <button
+                type="button"
+                phx-click="theme_apply_preset"
+                phx-value-preset={preset_name}
+                class={[
+                  "theme-preset",
+                  @theme_editor_active_preset == preset_name && "theme-preset-active"
+                ]}
+              >
+                <div class="theme-preset-name">{preset_name}</div>
+                <div class="theme-preset-desc">{description}</div>
+              </button>
+            <% end %>
+          </div>
+        </div>
+
+        <%!-- Mood --%>
+        <div class="theme-section">
+          <label class="theme-section-label">Colour mood</label>
+          <div class="theme-chips">
+            <%= for mood <- ["warm", "neutral", "cool", "dark"] do %>
+              <button
+                type="button"
+                phx-click="theme_update_setting"
+                phx-value-field="mood"
+                phx-value-setting_value={mood}
+                class={["theme-chip", @theme_editor_settings.mood == mood && "theme-chip-active"]}
+              >
+                {mood}
+              </button>
+            <% end %>
+          </div>
+        </div>
+
+        <%!-- Typography --%>
+        <div class="theme-section">
+          <label class="theme-section-label">Font style</label>
+          <div class="theme-chips">
+            <%= for typo <- ["clean", "editorial", "modern", "classic", "friendly", "minimal"] do %>
+              <button
+                type="button"
+                phx-click="theme_update_setting"
+                phx-value-field="typography"
+                phx-value-setting_value={typo}
+                class={[
+                  "theme-chip",
+                  @theme_editor_settings.typography == typo && "theme-chip-active"
+                ]}
+              >
+                {typo}
+              </button>
+            <% end %>
+          </div>
+        </div>
+
+        <%!-- Shape --%>
+        <div class="theme-section">
+          <label class="theme-section-label">Corner style</label>
+          <div class="theme-chips">
+            <%= for shape <- ["sharp", "soft", "round", "pill"] do %>
+              <button
+                type="button"
+                phx-click="theme_update_setting"
+                phx-value-field="shape"
+                phx-value-setting_value={shape}
+                class={["theme-chip", @theme_editor_settings.shape == shape && "theme-chip-active"]}
+              >
+                {shape}
+              </button>
+            <% end %>
+          </div>
+        </div>
+
+        <%!-- More options link --%>
+        <details
+          class="theme-customise"
+          id="theme-customise-section"
+          open={@theme_editor_customise_open}
+        >
+          <summary class="theme-customise-summary" phx-click="theme_toggle_customise">
+            <span class="theme-customise-label">More options</span>
+            <svg
+              class="theme-customise-chevron"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              stroke-width="2"
+            >
+              <polyline points="6 9 12 15 18 9"></polyline>
+            </svg>
+          </summary>
+          <div class="theme-customise-body">
+            <p class="admin-text-secondary">
+              For full theme customisation including branding, colours, and layout, <a
+                href="/admin/theme"
+                class="admin-link"
+              >visit the theme editor</a>.
+            </p>
+          </div>
+        </details>
+      <% else %>
+        <p class="admin-text-secondary">Loading theme settings...</p>
+      <% end %>
+    </div>
+    """
+  end
+
+  # Settings editor content - shows page/shop settings
+  attr :page, :map, default: nil
+  attr :site_name, :string, default: ""
+
+  defp settings_editor_content(assigns) do
+    ~H"""
+    <div class="editor-settings-content">
+      <%= if @page do %>
+        <div class="theme-section">
+          <label class="theme-section-label">Page</label>
+          <p class="admin-text-secondary">{@page.title}</p>
+        </div>
+        <div class="theme-section">
+          <p class="admin-text-secondary">
+            Page settings like SEO, visibility, and slug editing coming soon.
+            For now, <a href="/admin/pages" class="admin-link">manage pages in admin</a>.
+          </p>
+        </div>
+      <% else %>
+        <div class="theme-section">
+          <p class="admin-text-secondary">
+            This page doesn't have editable settings.
+            <a href="/admin/settings" class="admin-link">Shop settings</a>
+            can be changed in admin.
+          </p>
+        </div>
+      <% end %>
+    </div>
+    """
+  end
+
   # Editor sheet content - the block list and editing controls
-  attr :page, :map, required: true
+  attr :page, :map, default: nil
   attr :editing_blocks, :list, default: nil
   attr :editor_history, :list, default: []
   attr :editor_future, :list, default: []