✨ Post embed view

lib/widgets/post/compose_toolbar.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:island/models/post.dart';
 import 'package:island/services/compose_storage_db.dart';
+import 'package:island/widgets/post/compose_embed_sheet.dart';
 import 'package:island/widgets/post/compose_shared.dart';
 import 'package:island/widgets/post/draft_manager.dart';
 import 'package:material_symbols_icons/symbols.dart';
@@ -40,6 +41,14 @@ class ComposeToolbar extends HookConsumerWidget {
       ComposeLogic.pickPoll(ref, state, context);
     }
 
+    void showEmbedSheet() {
+      showModalBottomSheet(
+        context: context,
+        isScrollControlled: true,
+        builder: (context) => ComposeEmbedSheet(state: state),
+      );
+    }
+
     void showDraftManager() {
       showModalBottomSheet(
         context: context,
@@ -112,6 +121,25 @@ class ComposeToolbar extends HookConsumerWidget {
                   );
                 },
               ),
+              // Embed button with visual state when embed is present
+              ListenableBuilder(
+                listenable: state.embedView,
+                builder: (context, _) {
+                  return IconButton(
+                    onPressed: showEmbedSheet,
+                    icon: const Icon(Symbols.web),
+                    tooltip: 'embedView'.tr(),
+                    color: colorScheme.primary,
+                    style: ButtonStyle(
+                      backgroundColor: WidgetStatePropertyAll(
+                        state.embedView.value != null
+                            ? colorScheme.primary.withOpacity(0.15)
+                            : null,
+                      ),
+                    ),
+                  );
+                },
+              ),
               const Spacer(),
               if (originalPost == null && state.isEmpty)
                 IconButton(