feat: improve email copy UX with colored alerts and mailto button

- Green success alert for copied confirmation
- Blue info alert with BCC privacy tip
- Mailto button opens email program with BCC recipients
- Alerts stack vertically instead of overlapping

lib/mv_web/components/core_components.ex

@@ -42,7 +42,11 @@ defmodule MvWeb.CoreComponents do
   attr :id, :string, doc: "the optional id of flash container"
   attr :flash, :map, default: %{}, doc: "the map of flash messages to display"
   attr :title, :string, default: nil
-  attr :kind, :atom, values: [:info, :error], doc: "used for styling and flash lookup"
+
+  attr :kind, :atom,
+    values: [:info, :error, :success, :warning],
+    doc: "used for styling and flash lookup"
+
   attr :rest, :global, doc: "the arbitrary HTML attributes to add to the flash container"
 
   slot :inner_block, doc: "the optional inner block that renders the flash message"
@@ -56,25 +60,27 @@ defmodule MvWeb.CoreComponents do
       id={@id}
       phx-click={JS.push("lv:clear-flash", value: %{key: @kind}) |> hide("##{@id}")}
       role="alert"
-      class="toast toast-top toast-end z-50"
-      {@rest}
-    >
-      <div class={[
+      class={[
         "alert w-80 sm:w-96 max-w-80 sm:max-w-96 text-wrap",
         @kind == :info && "alert-info",
-        @kind == :error && "alert-error"
-      ]}>
-        <.icon :if={@kind == :info} name="hero-information-circle" class="size-5 shrink-0" />
-        <.icon :if={@kind == :error} name="hero-exclamation-circle" class="size-5 shrink-0" />
-        <div>
-          <p :if={@title} class="font-semibold">{@title}</p>
-          <p>{msg}</p>
-        </div>
-        <div class="flex-1" />
-        <button type="button" class="group self-start cursor-pointer" aria-label={gettext("close")}>
-          <.icon name="hero-x-mark" class="size-5 opacity-40 group-hover:opacity-70" />
-        </button>
+        @kind == :error && "alert-error",
+        @kind == :success && "bg-green-500 text-white",
+        @kind == :warning && "bg-blue-100 text-blue-800 border border-blue-300"
+      ]}
+      {@rest}
+    >
+      <.icon :if={@kind == :info} name="hero-information-circle" class="size-5 shrink-0" />
+      <.icon :if={@kind == :error} name="hero-exclamation-circle" class="size-5 shrink-0" />
+      <.icon :if={@kind == :success} name="hero-check-circle" class="size-5 shrink-0" />
+      <.icon :if={@kind == :warning} name="hero-information-circle" class="size-5 shrink-0" />
+      <div>
+        <p :if={@title} class="font-semibold">{@title}</p>
+        <p>{msg}</p>
       </div>
+      <div class="flex-1" />
+      <button type="button" class="group self-start cursor-pointer" aria-label={gettext("close")}>
+        <.icon name="hero-x-mark" class="size-5 opacity-40 group-hover:opacity-70" />
+      </button>
     </div>
     """
   end