feat(learn): the image an assistant asks to see shows beside the question

A card's image the model asks for (ADR 0021, D12) shows as a thumbnail in
the approval box, so the person sees what they approve; a PDF's page is
named by its number and title. The proposals and conversation sheets read
their cubits only in callbacks, as leancode_lint asks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/learn/halkyon_learn_flutter/lib/src/feature/assistant/widget/card_proposals_sheet.dart

@@ -129,7 +129,7 @@ class _ProposalsSheetState() extends State<_ProposalsSheet> {
     final l10n = AppLocalizations.of(context);
     final theme = Theme.of(context);
     final state = context.watch<CardProposalsCubit>().state;
-    final proposals = context.read<CardProposalsCubit>();
+    CardProposalsCubit proposals() => context.read<CardProposalsCubit>();
     final count = state.chosen.length;
     return SheetScaffold(
       title: l10n.proposalsTitle(widget.name),
@@ -163,7 +163,7 @@ class _ProposalsSheetState() extends State<_ProposalsSheet> {
               TextButton.icon(
                 icon: const Icon(LucideIcons.rotateCw),
                 label: Text(l10n.commonTryAgain),
-                onPressed: () => unawaited(proposals.propose()),
+                onPressed: () => unawaited(proposals().propose()),
               ),
             ],
           ),
@@ -183,7 +183,7 @@ class _ProposalsSheetState() extends State<_ProposalsSheet> {
                 contentPadding: EdgeInsets.zero,
                 leading: Checkbox(
                   value: state.chosen.contains(index),
-                  onChanged: (_) => proposals.toggle(index),
+                  onChanged: (_) => proposals().toggle(index),
                 ),
                 title: Text(card.front),
                 subtitle: Text(card.back),
@@ -192,7 +192,7 @@ class _ProposalsSheetState() extends State<_ProposalsSheet> {
                   icon: const Icon(LucideIcons.pencil),
                   onPressed: () => unawaited(_edit(index, card)),
                 ),
-                onTap: () => proposals.toggle(index),
+                onTap: () => proposals().toggle(index),
               ),
           ],
         ),

apps/learn/halkyon_learn_flutter/lib/src/feature/assistant/widget/conversation_sheet.dart

@@ -5,6 +5,7 @@ import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:halkyon_app/halkyon_app.dart';
 import 'package:halkyon_learn_flutter/l10n/app_localizations.dart';
+import 'package:halkyon_learn_flutter/src/core/asset/widget/stored_file_image.dart';
 import 'package:halkyon_learn_flutter/src/core/content/rich_content.dart';
 import 'package:halkyon_learn_flutter/src/core/dependencies/dependencies.dart';
 import 'package:halkyon_learn_flutter/src/core/dependencies/person_dependencies.dart';
@@ -66,7 +67,7 @@ Future<void> showConversation(
     builder: (context) => BlocProvider(
       // Closing the sheet closes the cubit, which stops an answer on its
       // way.
-      create: (_) => cubit,
+      create: (context) => cubit,
       child: _ConversationSheet(name: name, scope: scope, choice: choice),
     ),
   );
@@ -385,7 +386,6 @@ class const _ImageApproval({
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context);
     final theme = Theme.of(context);
-    final conversation = context.read<ConversationCubit>();
     return Padding(
       padding: const EdgeInsets.only(top: 8),
       child: DecoratedBox(
@@ -401,13 +401,32 @@ class const _ImageApproval({
               Row(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
-                  Icon(
+                  // A card's image as the person knows it, so they see what
-                    image.kind == LookupKind.pageImage
+                  // they approve; a page by its number and title.
-                        ? LucideIcons.fileImage
+                  if (image.assetId case final assetId?)
-                        : LucideIcons.image,
+                    ClipRRect(
-                    size: 20,
+                      borderRadius: BorderRadius.circular(8),
-                    color: theme.colorScheme.primary,
+                      child: SizedBox.square(
-                  ),
+                        dimension: 56,
+                        child: Image(
+                          image: StoredFileImage(
+                            PersonDependencies.of(context).assets,
+                            assetId,
+                          ),
+                          fit: BoxFit.cover,
+                          errorBuilder: (context, _, _) => Icon(
+                            LucideIcons.image,
+                            color: theme.colorScheme.primary,
+                          ),
+                        ),
+                      ),
+                    )
+                  else
+                    Icon(
+                      LucideIcons.fileImage,
+                      size: 20,
+                      color: theme.colorScheme.primary,
+                    ),
                   const SizedBox(width: 12),
                   Expanded(
                     child: Text(switch (image.kind) {
@@ -430,11 +449,17 @@ class const _ImageApproval({
                 spacing: 8,
                 children: [
                   TextButton(
-                    onPressed: () => conversation.approveImage(approved: false),
+                    onPressed: () =>
+                        context.read<ConversationCubit>().approveImage(
+                          approved: false,
+                        ),
                     child: Text(l10n.assistantImageDontShow),
                   ),
                   FilledButton.tonal(
-                    onPressed: () => conversation.approveImage(approved: true),
+                    onPressed: () =>
+                        context.read<ConversationCubit>().approveImage(
+                          approved: true,
+                        ),
                     child: Text(l10n.assistantImageShow),
                   ),
                 ],