Set app version to 1.0.0+3; share sheet and markdown viewer polish; remove demo screenshot tooling

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

lib/widgets/viewer/media_text_preview.dart

@@ -1,12 +1,25 @@
 import 'dart:convert';
 import 'dart:io';
 import 'package:flutter/material.dart';
+import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
+import 'package:lucide_icons_flutter/lucide_icons.dart';
 import '../../models/nextcloud_item.dart';
 import '../../providers/session_controller.dart';
 import '../../theme/design_tokens.dart';
+import '../noo/core/noo_button.dart';
 
-/// Plain monospace text-file preview for [FileViewerScreen]'s static (non-
-/// swipeable) preview path (`_textPreviewExtensions`).
+/// Space the viewer's floating top bar and bottom action bar cover, so the
+/// text sits clear of them (and the status bar) instead of scrolling
+/// underneath.
+const double _kTopBarClearance = 72;
+const double _kActionBarClearance = 112;
+
+/// Text/markdown file preview and editor for [FileViewerScreen]'s static
+/// (non-swipeable) path (`_textPreviewExtensions`). Content is always
+/// editable when online; a Save button appears once it has changed. Markdown
+/// files open rendered, with an Edit/Preview toggle. Opened
+/// from the Offline tab ([localPathResolver] set) it is read-only, since the
+/// local copy has no server to write back to.
 class MediaTextPreview extends StatefulWidget {
   final NextcloudItem item;
   final SessionController session;
@@ -28,15 +41,35 @@ class MediaTextPreview extends StatefulWidget {
 }
 
 class _MediaTextPreviewState extends State<MediaTextPreview> {
-  String? _content;
+  final _controller = TextEditingController();
+  String? _saved;
   String? _error;
+  bool _isSaving = false;
+  bool _editing = false;
+
+  bool get _isMarkdown {
+    final name = widget.item.name.toLowerCase();
+    return name.endsWith('.md') || name.endsWith('.markdown');
+  }
+
+  bool get _showRendered => _isMarkdown && !_editing;
+
+  bool get _readOnly => widget.localPathResolver != null;
+  bool get _dirty => _saved != null && _controller.text != _saved;
 
   @override
   void initState() {
     super.initState();
+    _controller.addListener(() => setState(() {}));
     _load();
   }
 
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
   Future<void> _load() async {
     try {
       final List<int> bytes;
@@ -53,13 +86,39 @@ class _MediaTextPreviewState extends State<MediaTextPreview> {
         bytes = await widget.session.service!.fetchBytes(widget.item.path);
       }
       if (mounted) {
-        setState(() => _content = utf8.decode(bytes, allowMalformed: true));
+        final text = utf8.decode(bytes, allowMalformed: true);
+        _controller.text = text;
+        setState(() => _saved = text);
       }
     } catch (e) {
       if (mounted) setState(() => _error = e.toString());
     }
   }
 
+  Future<void> _save() async {
+    final messenger = ScaffoldMessenger.of(context);
+    final text = _controller.text;
+    setState(() => _isSaving = true);
+    var ok = false;
+    try {
+      ok = await widget.session.service!.putBytes(
+        widget.item.path,
+        utf8.encode(text),
+      );
+    } catch (_) {}
+    if (!mounted) return;
+    setState(() {
+      _isSaving = false;
+      if (ok) _saved = text;
+    });
+    messenger.showSnackBar(
+      SnackBar(
+        content: Text(ok ? 'Saved ${widget.item.name}' : 'Could not save file'),
+        behavior: SnackBarBehavior.floating,
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final colors = context.nooColors;
@@ -71,18 +130,103 @@ class _MediaTextPreviewState extends State<MediaTextPreview> {
         ),
       );
     }
-    if (_content == null) {
+    if (_saved == null) {
       return Center(child: CircularProgressIndicator(color: colors.accent));
     }
+    final safe = MediaQuery.paddingOf(context);
+    final style = NooText.mono.copyWith(color: colors.fg1, height: 1.5);
+    final padding = EdgeInsets.fromLTRB(
+      20,
+      safe.top + _kTopBarClearance,
+      20,
+      safe.bottom + _kActionBarClearance,
+    );
     return Container(
       color: colors.surface,
-      padding: const EdgeInsets.all(20),
-      child: SingleChildScrollView(
-        child: SelectableText(
-          _content!,
-          style: NooText.mono.copyWith(color: colors.fg1, height: 1.5),
-        ),
+      child: Stack(
+        children: [
+          Positioned.fill(
+            child: _showRendered
+                ? Markdown(
+                    data: _controller.text,
+                    padding: padding,
+                    selectable: true,
+                    styleSheet: _markdownStyle(context, colors),
+                    onTapLink: (_, href, _) {},
+                  )
+                : SingleChildScrollView(
+                    padding: padding,
+                    child: TextField(
+                      controller: _controller,
+                      readOnly: _readOnly,
+                      maxLines: null,
+                      keyboardType: TextInputType.multiline,
+                      style: style,
+                      cursorColor: colors.accentText,
+                      decoration: const InputDecoration(
+                        isDense: true,
+                        border: InputBorder.none,
+                        contentPadding: EdgeInsets.zero,
+                      ),
+                    ),
+                  ),
+          ),
+          if (_isMarkdown && !_readOnly)
+            Positioned(
+              right: 20,
+              top: safe.top + _kTopBarClearance - 8,
+              child: NooButton(
+                variant: NooButtonVariant.tonal,
+                size: NooButtonSize.compact,
+                icon: _editing ? LucideIcons.eye : LucideIcons.pencil,
+                onTap: () => setState(() => _editing = !_editing),
+                child: Text(_editing ? 'Preview' : 'Edit'),
+              ),
+            ),
+          if (_dirty)
+            Positioned(
+              right: 20,
+              bottom: safe.bottom + _kActionBarClearance,
+              child: NooButton(
+                size: NooButtonSize.card,
+                icon: LucideIcons.save,
+                disabled: _isSaving,
+                onTap: _isSaving ? null : _save,
+                child: Text(_isSaving ? 'Saving…' : 'Save'),
+              ),
+            ),
+        ],
       ),
     );
   }
 }
+
+MarkdownStyleSheet _markdownStyle(BuildContext context, NooColors colors) {
+  final body = NooText.body.copyWith(color: colors.fg1, height: 1.55);
+  TextStyle heading(double size) =>
+      NooText.title.copyWith(color: colors.fg1, fontSize: size, height: 1.25);
+  return MarkdownStyleSheet.fromTheme(Theme.of(context)).copyWith(
+    p: body,
+    h1: heading(26),
+    h2: heading(22),
+    h3: heading(19),
+    h4: heading(17),
+    listBullet: body,
+    a: body.copyWith(color: colors.accentText),
+    blockquote: body.copyWith(color: colors.fg2),
+    blockquoteDecoration: BoxDecoration(
+      border: Border(left: BorderSide(color: colors.line, width: 3)),
+    ),
+    code: NooText.mono.copyWith(
+      color: colors.fg1,
+      backgroundColor: colors.surface2,
+    ),
+    codeblockDecoration: BoxDecoration(
+      color: colors.surface2,
+      borderRadius: BorderRadius.circular(NooRadii.input),
+    ),
+    horizontalRuleDecoration: BoxDecoration(
+      border: Border(top: BorderSide(color: colors.line)),
+    ),
+  );
+}