chain-studio/lib/main.dart
flemming-it c7869870c4 feat(studio): plain-language ask bar + collapsible filter + AI search (v0.32.0)
Three changes against the user feedback "der text ist zu
zerhackt, die filter-leiste nimmt zu viel sicht weg, llm-suche
wenn das geht":

1. Today-Hero copy rewritten in flowing prose. The fallback
   story drops the code-fence templates ("`mcp.<server>.<tool>`")
   and reads as a single arc per language. Same trust model,
   gentler register.

2. Filter row collapses behind a single `_FilterButton` with a
   "Filter · N active" count badge. Status / Source / Installed
   chips now live inside `_FilterDialog` — invisible until the
   operator wants them, recovers a full row of viewport. The
   category strip stays inline because category is the most
   common cut and benefits from being one click away.

3. New `_AskBar` replaces the old single-line `_SearchField`:

   - Multi-line input (1-4 lines auto-grow) so questions don't
     overflow horizontally.
   - Cmd+Enter / Ctrl+Enter submits; bare Enter inserts a
     newline so the operator can write multi-line questions
     naturally.
   - Heuristic question detector (ends in `?` or ≥4 words)
     routes the submit to the System-AI's askAi RPC instead of
     the substring search. Live keystrokes still keyword-search
     for short queries; question-shaped input holds the grid
     steady until submit so the visible result set doesn't
     wipe with every space.
   - The LLM is asked for a strict-JSON ranking of up to 5
     modules with a one-phrase reason each. Unknown module
     names are dropped silently — operators must not see
     hallucinated entries.
   - The new `_AiAnswerCard` renders the LLM's answer plus the
     ranked match list above the grid; the grid filters to
     just those names so the answer and the visible cards
     stay coherent. Clearing the question collapses everything
     back.
   - Falls back to plain keyword search when System AI is off
     (with an explanatory hint instead of the AI hint).

The AI path uses the System-AI the operator already configured
in Settings; same privacy mode, same audit-log trail. Nothing
new leaves the hub.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>
2026-05-08 13:21:40 +02:00

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// F∆I Studio — desktop GUI for the F∆I hub.
//
// Visual language: warm minimalism / deep tech with soul.
// Tokens in lib/theme/, primitives in lib/widgets/.
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'data/hub.dart';
import 'data/system_actions.dart';
import 'l10n/app_localizations.dart';
import 'pages/approvals.dart';
import 'pages/audit.dart';
import 'pages/doctor.dart';
import 'pages/flows.dart';
import 'pages/modules.dart';
import 'pages/store.dart';
import 'theme/theme.dart';
import 'theme/tokens.dart';
import 'widgets/fai_search_palette.dart';
import 'widgets/widgets.dart';
/// Studio's own build version. Bump on every UI commit so the
/// running app self-identifies — visible in the sidebar header
/// and quick-glance proof that you're seeing the current build.
const String kStudioVersion = '0.32.0';
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
// Restore the persisted endpoint, theme mode, and locale
// before the first frame so none of them flicker on startup.
await HubService.instance.loadPersistedEndpoint();
final themeMode = await HubService.instance.loadThemeMode();
final locale = await HubService.instance.loadLocale();
runApp(StudioApp(initialThemeMode: themeMode, initialLocale: locale));
}
class StudioApp extends StatefulWidget {
final ThemeModeValue initialThemeMode;
final Locale initialLocale;
const StudioApp({
super.key,
required this.initialThemeMode,
required this.initialLocale,
});
/// Lookup helper so descendants can flip the theme without
/// passing callbacks down through every level.
static StudioAppState? of(BuildContext context) =>
context.findAncestorStateOfType<StudioAppState>();
@override
State<StudioApp> createState() => StudioAppState();
}
class StudioAppState extends State<StudioApp> {
/// Exposed so any descendant can listen via
/// `ValueListenableBuilder` and rebuild instantly when the
/// theme flips. setState alone wouldn't propagate through
/// `MaterialApp(home: const StudioShell())` because the
/// const child's element doesn't get a `didUpdateWidget`.
late final ValueNotifier<ThemeModeValue> modeNotifier;
/// Active app locale. The sidebar's language toggle flips
/// this, MaterialApp re-renders with the new
/// AppLocalizations, and every translated string updates.
late final ValueNotifier<Locale> localeNotifier;
Future<void> setMode(ThemeModeValue m) async {
modeNotifier.value = m;
await HubService.instance.saveThemeMode(m);
}
Future<void> setLocale(Locale l) async {
localeNotifier.value = l;
await HubService.instance.saveLocale(l);
}
@override
void initState() {
super.initState();
modeNotifier = ValueNotifier(widget.initialThemeMode);
localeNotifier = ValueNotifier(widget.initialLocale);
}
@override
void dispose() {
modeNotifier.dispose();
localeNotifier.dispose();
super.dispose();
}
ThemeMode _flutterMode(ThemeModeValue v) {
switch (v) {
case ThemeModeValue.system:
return ThemeMode.system;
case ThemeModeValue.light:
return ThemeMode.light;
case ThemeModeValue.dark:
return ThemeMode.dark;
}
}
@override
Widget build(BuildContext context) {
return ValueListenableBuilder<ThemeModeValue>(
valueListenable: modeNotifier,
builder: (_, mode, _) => ValueListenableBuilder<Locale>(
valueListenable: localeNotifier,
builder: (_, locale, _) => MaterialApp(
title: 'F∆I Studio',
debugShowCheckedModeBanner: false,
theme: FaiTheme.light(),
darkTheme: FaiTheme.dark(),
themeMode: _flutterMode(mode),
locale: locale,
supportedLocales: AppLocalizations.supportedLocales,
localizationsDelegates: AppLocalizations.localizationsDelegates,
home: const StudioShell(),
),
),
);
}
}
class StudioShell extends StatefulWidget {
const StudioShell({super.key});
@override
State<StudioShell> createState() => _StudioShellState();
}
class _StudioShellState extends State<StudioShell> {
int _selectedIndex = 0;
bool? _connected; // null = unknown, polled on a timer
String? _activeChannel; // local / dev / beta / production
Timer? _healthPoll;
static const _pages = <_NavPage>[
_NavPage(
id: 'doctor',
icon: Icons.health_and_safety_outlined,
selectedIcon: Icons.health_and_safety,
page: DoctorPage(),
),
_NavPage(
id: 'modules',
icon: Icons.extension_outlined,
selectedIcon: Icons.extension,
page: ModulesPage(),
),
_NavPage(
id: 'store',
icon: Icons.storefront_outlined,
selectedIcon: Icons.storefront,
page: StorePage(),
),
_NavPage(
id: 'flows',
icon: Icons.account_tree_outlined,
selectedIcon: Icons.account_tree,
page: FlowsPage(),
),
_NavPage(
id: 'audit',
icon: Icons.timeline_outlined,
selectedIcon: Icons.timeline,
page: AuditPage(),
),
_NavPage(
id: 'approvals',
icon: Icons.inbox_outlined,
selectedIcon: Icons.inbox,
page: ApprovalsPage(),
),
];
@override
void initState() {
super.initState();
_checkHealth();
_healthPoll = Timer.periodic(
const Duration(seconds: 5),
(_) => _checkHealth(),
);
}
Future<void> _checkHealth() async {
final ok = await HubService.instance.healthy();
if (!mounted) return;
if (_connected != ok) setState(() => _connected = ok);
// Refresh the active channel pointer alongside the health
// probe — cheap, and keeps the sidebar pill honest if the
// operator switched channels from the CLI.
if (ok) {
try {
final snap = await HubService.instance.channelStatus();
if (!mounted) return;
if (_activeChannel != snap.active) {
setState(() => _activeChannel = snap.active);
}
} catch (_) {
// Best-effort; pill simply doesn't update this tick.
}
}
}
@override
void dispose() {
_healthPoll?.cancel();
super.dispose();
}
void _openSearchPalette() {
final l = AppLocalizations.of(context)!;
final pagesGroup = l.searchGroupPages;
final hits = <FaiSearchHit>[
for (var i = 0; i < _pages.length; i++)
FaiSearchHit(
label: _pages[i].labelOf(context),
hint: l.searchPageHint(i + 1),
icon: _pages[i].icon,
group: pagesGroup,
onSelect: () {
Navigator.of(context).pop();
setState(() => _selectedIndex = i);
},
),
FaiSearchHit(
label: l.searchSettingsLabel,
hint: l.searchSettingsHint,
icon: Icons.settings_outlined,
group: pagesGroup,
onSelect: () {
Navigator.of(context).pop();
FaiSettingsDialog.show(context);
},
),
];
FaiSearchPalette.show(context, staticHits: hits);
}
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
return Shortcuts(
shortcuts: <ShortcutActivator, Intent>{
// Cmd+1..6 jumps to the matching destination. Numbered
// 1-based to match the visual order in the sidebar.
for (var i = 0; i < _pages.length; i++)
SingleActivator(
LogicalKeyboardKey(LogicalKeyboardKey.digit1.keyId + i),
meta: true,
): _GoToPageIntent(i),
// Settings dialog. macOS reserves Cmd+, for the native
// app-Preferences menu item, which Flutter Desktop
// doesn't wire up — the keystroke is captured by the OS
// before it reaches our Shortcuts widget. Cmd+; is the
// working alternative; we register Cmd+, too for
// completeness in case a future Flutter version (or a
// native-menu setup) lets it through.
const SingleActivator(LogicalKeyboardKey.semicolon, meta: true):
const _OpenSettingsIntent(),
const SingleActivator(LogicalKeyboardKey.comma, meta: true):
const _OpenSettingsIntent(),
// Universal command palette. Mirrors Cmd+K from VSCode /
// Linear / 1Password — operators jump anywhere by typing.
const SingleActivator(LogicalKeyboardKey.keyK, meta: true):
const _OpenSearchIntent(),
const SingleActivator(LogicalKeyboardKey.keyK, control: true):
const _OpenSearchIntent(),
},
child: Actions(
actions: <Type, Action<Intent>>{
_GoToPageIntent: CallbackAction<_GoToPageIntent>(
onInvoke: (intent) {
setState(() => _selectedIndex = intent.index);
return null;
},
),
_OpenSettingsIntent: CallbackAction<_OpenSettingsIntent>(
onInvoke: (_) {
FaiSettingsDialog.show(context);
return null;
},
),
_OpenSearchIntent: CallbackAction<_OpenSearchIntent>(
onInvoke: (_) {
_openSearchPalette();
return null;
},
),
},
child: Focus(
autofocus: true,
child: Scaffold(
body: Row(
children: [
_Sidebar(
selectedIndex: _selectedIndex,
onSelect: (i) => setState(() => _selectedIndex = i),
pages: _pages,
connected: _connected,
endpointLabel: HubService.instance.endpointLabel,
activeChannel: _activeChannel,
),
Container(
width: 1,
color: theme.colorScheme.outlineVariant,
),
Expanded(
child: AnimatedSwitcher(
duration: FaiMotion.base,
switchInCurve: FaiMotion.easing,
switchOutCurve: FaiMotion.easing,
transitionBuilder: (child, anim) => FadeTransition(
opacity: anim,
child: SlideTransition(
position: Tween<Offset>(
begin: const Offset(0, 0.02),
end: Offset.zero,
).animate(anim),
child: child,
),
),
child: KeyedSubtree(
key: ValueKey(_selectedIndex),
child: _pages[_selectedIndex].page,
),
),
),
],
),
),
),
),
);
}
}
/// Intents driven by the Shortcuts/Actions pair on the shell.
class _GoToPageIntent extends Intent {
final int index;
const _GoToPageIntent(this.index);
}
class _OpenSettingsIntent extends Intent {
const _OpenSettingsIntent();
}
class _OpenSearchIntent extends Intent {
const _OpenSearchIntent();
}
class _Sidebar extends StatelessWidget {
final int selectedIndex;
final ValueChanged<int> onSelect;
final List<_NavPage> pages;
final bool? connected;
final String endpointLabel;
/// Active channel name from the running daemon
/// (`local`/`dev`/`beta`/`production`). Null while the
/// initial fetch is in flight or the hub is unreachable.
final String? activeChannel;
const _Sidebar({
required this.selectedIndex,
required this.onSelect,
required this.pages,
required this.connected,
required this.endpointLabel,
required this.activeChannel,
});
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final mode = connected == true ? FaiDeltaMode.live : FaiDeltaMode.idle;
return Container(
width: 220,
color: theme.colorScheme.surfaceContainerLow,
padding: const EdgeInsets.symmetric(vertical: FaiSpace.xl),
child: Column(
children: [
// Brand mark.
FaiDeltaMark(color: theme.colorScheme.primary, mode: mode),
const SizedBox(height: FaiSpace.md),
Text(
'F∆I Studio',
style: theme.textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.w600,
),
),
const SizedBox(height: 2),
Text(
'v$kStudioVersion',
style: FaiTheme.mono(
size: 10,
color: theme.colorScheme.primary,
),
),
const SizedBox(height: FaiSpace.md),
// Connection pill.
Padding(
padding: const EdgeInsets.symmetric(horizontal: FaiSpace.lg),
child: _ConnectionPill(
connected: connected,
label: endpointLabel,
onStartRequested: () async {
final r = await SystemActions.faiDaemon(['start']);
if (!context.mounted) return;
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text(
r.ok
? 'Daemon start requested. Reconnecting…'
: 'Could not start daemon: ${r.stderr.trim().isEmpty ? r.stdout.trim() : r.stderr.trim()}',
),
),
);
},
),
),
if (activeChannel != null && activeChannel!.isNotEmpty) ...[
const SizedBox(height: FaiSpace.sm),
Padding(
padding: const EdgeInsets.symmetric(horizontal: FaiSpace.lg),
child: _ChannelPill(channel: activeChannel!),
),
],
const SizedBox(height: FaiSpace.xxl),
// Destinations.
Expanded(
child: ListView(
padding: const EdgeInsets.symmetric(horizontal: FaiSpace.md),
children: [
for (var i = 0; i < pages.length; i++)
_SidebarItem(
page: pages[i],
selected: i == selectedIndex,
onTap: () => onSelect(i),
),
],
),
),
// Footer: theme toggle · live wall-clock · settings.
// Clock sits between the two icons so it reads as a
// status line — gives the operator a wall-clock
// reference to cross-check audit-log timestamps
// without taking sidebar real estate from anything
// load-bearing.
Padding(
padding: const EdgeInsets.symmetric(horizontal: FaiSpace.md),
child: Row(
children: [
_ThemeToggle(),
_LanguageToggle(),
const Expanded(
child: Center(child: _SidebarClock()),
),
IconButton(
icon: const Icon(Icons.settings_outlined, size: 16),
tooltip: 'Settings (⌘;)',
visualDensity: VisualDensity.compact,
onPressed: () async {
final saved = await FaiSettingsDialog.show(context);
if (saved && context.mounted) {
// Force a sidebar rebuild so the new endpoint
// shows in the connection pill.
(context as Element).markNeedsBuild();
}
},
),
],
),
),
],
),
);
}
}
/// Active-channel indicator. Click to open Settings (where the
/// operator can switch). Color-coded so production deployments
/// look visibly different from local-dev — the kind of thing
/// you want to see before clicking "Clear log".
class _ChannelPill extends StatelessWidget {
final String channel;
const _ChannelPill({required this.channel});
Color _accent(ColorScheme cs) {
switch (channel) {
case 'production':
return cs.error;
case 'beta':
return FaiColors.warning;
case 'dev':
return cs.primary;
case 'local':
default:
return cs.onSurfaceVariant;
}
}
IconData get _icon {
switch (channel) {
case 'production':
return Icons.shield_outlined;
case 'beta':
return Icons.science_outlined;
case 'dev':
return Icons.bolt_outlined;
case 'local':
default:
return Icons.home_work_outlined;
}
}
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final accent = _accent(theme.colorScheme);
return Tooltip(
message:
'Active channel — click to switch in Settings (⌘;).\n'
'production = stable · beta = pre-release · dev = rolling · local = workspace',
child: Material(
color: theme.colorScheme.surfaceContainerHigh,
borderRadius: BorderRadius.circular(FaiRadius.sm),
child: InkWell(
borderRadius: BorderRadius.circular(FaiRadius.sm),
onTap: () => FaiSettingsDialog.show(context),
child: Container(
padding: const EdgeInsets.symmetric(
horizontal: FaiSpace.sm,
vertical: 4,
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(FaiRadius.sm),
border: Border.all(color: accent.withValues(alpha: 0.4)),
),
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
Icon(_icon, size: 11, color: accent),
const SizedBox(width: 4),
Text(
channel,
style: FaiTheme.mono(
size: 10,
weight: FontWeight.w600,
color: accent,
),
),
],
),
),
),
),
);
}
}
class _ConnectionPill extends StatelessWidget {
final bool? connected;
final String label;
/// Triggered by the inline "Start hub" button when the
/// daemon is unreachable. Runs `fai daemon start` server-side
/// (well, locally — Studio shells out). The shell-level
/// health poll picks the daemon up on its next tick.
final Future<void> Function() onStartRequested;
const _ConnectionPill({
required this.connected,
required this.label,
required this.onStartRequested,
});
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final dotColor = connected == true
? FaiColors.success
: connected == false
? FaiColors.danger
: FaiColors.muted;
final caption = connected == true
? 'connected'
: connected == false
? 'unreachable'
: 'connecting…';
return Container(
padding: const EdgeInsets.symmetric(
horizontal: FaiSpace.sm,
vertical: 6,
),
decoration: BoxDecoration(
color: theme.colorScheme.surfaceContainerHigh,
borderRadius: BorderRadius.circular(FaiRadius.sm),
border: Border.all(color: theme.colorScheme.outlineVariant),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Row(
mainAxisSize: MainAxisSize.min,
children: [
FaiStatusDot(color: dotColor, pulsing: connected == true),
const SizedBox(width: 6),
Text(
caption,
style: theme.textTheme.labelSmall?.copyWith(
color: dotColor == FaiColors.danger
? theme.colorScheme.error
: theme.colorScheme.onSurface,
fontWeight: FontWeight.w500,
),
),
],
),
const SizedBox(height: 2),
Text(
label,
style: FaiTheme.mono(
size: 10,
color: theme.colorScheme.onSurfaceVariant,
),
),
// Inline "Start hub" affordance when the daemon
// isn't there. Resolves the chicken-and-egg for
// Windows operators who can't run `fai daemon start`
// from a shell.
if (connected == false) ...[
const SizedBox(height: FaiSpace.sm),
SizedBox(
width: double.infinity,
child: FilledButton.tonalIcon(
onPressed: onStartRequested,
icon: const Icon(Icons.play_arrow, size: 14),
label: const Text(
'Start hub',
style: TextStyle(fontSize: 11),
),
style: FilledButton.styleFrom(
visualDensity: VisualDensity.compact,
padding: const EdgeInsets.symmetric(
horizontal: FaiSpace.sm,
vertical: 4,
),
),
),
),
],
],
),
);
}
}
class _SidebarItem extends StatefulWidget {
final _NavPage page;
final bool selected;
final VoidCallback onTap;
const _SidebarItem({
required this.page,
required this.selected,
required this.onTap,
});
@override
State<_SidebarItem> createState() => _SidebarItemState();
}
class _SidebarItemState extends State<_SidebarItem> {
bool _hovered = false;
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final color = widget.selected
? theme.colorScheme.primary
: _hovered
? theme.colorScheme.onSurface
: theme.colorScheme.onSurfaceVariant;
final bg = widget.selected
? theme.colorScheme.primary.withValues(alpha: 0.08)
: _hovered
? theme.colorScheme.surfaceContainerHigh
: Colors.transparent;
return Padding(
padding: const EdgeInsets.symmetric(vertical: 2),
child: MouseRegion(
onEnter: (_) => setState(() => _hovered = true),
onExit: (_) => setState(() => _hovered = false),
cursor: SystemMouseCursors.click,
child: GestureDetector(
behavior: HitTestBehavior.opaque,
onTap: widget.onTap,
child: AnimatedContainer(
duration: FaiMotion.fast,
padding: const EdgeInsets.symmetric(
horizontal: FaiSpace.md,
vertical: FaiSpace.md,
),
decoration: BoxDecoration(
color: bg,
borderRadius: BorderRadius.circular(FaiRadius.sm),
),
child: Row(
children: [
Icon(
widget.selected ? widget.page.selectedIcon : widget.page.icon,
size: 18,
color: color,
),
const SizedBox(width: FaiSpace.md),
Text(
widget.page.labelOf(context),
style: theme.textTheme.labelMedium?.copyWith(color: color),
),
],
),
),
),
),
);
}
}
class _NavPage {
/// Stable id used for the Cmd+K palette and the sidebar
/// shortcut keys; never shown to the operator. The visible
/// label comes from [labelOf] which reads the active
/// AppLocalizations.
final String id;
final IconData icon;
final IconData selectedIcon;
final Widget page;
const _NavPage({
required this.id,
required this.icon,
required this.selectedIcon,
required this.page,
});
/// Resolve the localized label via AppLocalizations.
String labelOf(BuildContext context) {
final l = AppLocalizations.of(context);
if (l == null) return id;
switch (id) {
case 'doctor':
return l.navDoctor;
case 'modules':
return l.navModules;
case 'store':
return l.navStore;
case 'flows':
return l.navFlows;
case 'audit':
return l.navAudit;
case 'approvals':
return l.navApprovals;
default:
return id;
}
}
}
class _ThemeToggle extends StatelessWidget {
@override
Widget build(BuildContext context) {
final app = StudioApp.of(context);
if (app == null) return const SizedBox.shrink();
return ValueListenableBuilder<ThemeModeValue>(
valueListenable: app.modeNotifier,
builder: (_, mode, _) {
final icon = switch (mode) {
ThemeModeValue.system => Icons.brightness_auto_outlined,
ThemeModeValue.light => Icons.light_mode_outlined,
ThemeModeValue.dark => Icons.dark_mode_outlined,
};
final tooltip = switch (mode) {
ThemeModeValue.system => 'theme: follow system',
ThemeModeValue.light => 'theme: light',
ThemeModeValue.dark => 'theme: dark',
};
return IconButton(
icon: Icon(icon, size: 16),
tooltip: tooltip,
visualDensity: VisualDensity.compact,
onPressed: () {
final next = switch (mode) {
ThemeModeValue.system => ThemeModeValue.light,
ThemeModeValue.light => ThemeModeValue.dark,
ThemeModeValue.dark => ThemeModeValue.system,
};
app.setMode(next);
},
);
},
);
}
}
/// Small ticking wall-clock for the sidebar. Aligns the on-screen
/// time with the timestamps the audit log writes — operators
/// glance here when an event timestamp looks off and want a
/// reference point. Updates on the second; tooltip exposes the
/// full ISO + UTC offset for unambiguous comparison.
class _SidebarClock extends StatefulWidget {
const _SidebarClock();
@override
State<_SidebarClock> createState() => _SidebarClockState();
}
class _SidebarClockState extends State<_SidebarClock> {
late DateTime _now;
Timer? _ticker;
@override
void initState() {
super.initState();
_now = DateTime.now();
_scheduleNextTick();
}
void _scheduleNextTick() {
// Align ticks on the second boundary so the seconds digit
// changes when the wall-clock second changes, not 0999 ms
// late depending on when the widget mounted.
final delay = Duration(milliseconds: 1000 - _now.millisecond);
_ticker = Timer(delay, () {
if (!mounted) return;
setState(() => _now = DateTime.now());
_ticker = Timer.periodic(const Duration(seconds: 1), (_) {
if (!mounted) return;
setState(() => _now = DateTime.now());
});
});
}
@override
void dispose() {
_ticker?.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final hh = _now.hour.toString().padLeft(2, '0');
final mm = _now.minute.toString().padLeft(2, '0');
final ss = _now.second.toString().padLeft(2, '0');
final yyyy = _now.year.toString().padLeft(4, '0');
final mo = _now.month.toString().padLeft(2, '0');
final dd = _now.day.toString().padLeft(2, '0');
final offsetMin = _now.timeZoneOffset.inMinutes;
final sign = offsetMin >= 0 ? '+' : '-';
final absMin = offsetMin.abs();
final offH = (absMin ~/ 60).toString().padLeft(2, '0');
final offM = (absMin % 60).toString().padLeft(2, '0');
final tooltip =
'Local: $yyyy-$mo-$dd $hh:$mm:$ss $sign$offH:$offM\n'
'UTC: ${_now.toUtc().toIso8601String()}';
return Tooltip(
message: tooltip,
child: Text(
'$hh:$mm:$ss',
style: FaiTheme.mono(
size: 11,
color: theme.colorScheme.onSurfaceVariant.withValues(alpha: 0.85),
),
),
);
}
}
/// Two-state language toggle (DE / EN) parked in the sidebar
/// footer next to the theme button. Flipping it updates the
/// app-wide locale via the parent [`StudioAppState`]; every
/// AppLocalizations consumer rebuilds with the new strings.
/// The Store-page detail sheet still renders bilingual store
/// fields off the same locale, so a single click flips
/// chrome + content together.
class _LanguageToggle extends StatelessWidget {
@override
Widget build(BuildContext context) {
final app = StudioApp.of(context);
if (app == null) return const SizedBox.shrink();
return ValueListenableBuilder<Locale>(
valueListenable: app.localeNotifier,
builder: (context, locale, _) {
final isDe = locale.languageCode == 'de';
return Tooltip(
message: isDe
? 'Sprache: Deutsch — Klick wechselt zu English'
: 'Language: English — click to switch to Deutsch',
child: TextButton(
onPressed: () => app.setLocale(Locale(isDe ? 'en' : 'de')),
style: TextButton.styleFrom(
minimumSize: const Size(36, 32),
padding: const EdgeInsets.symmetric(horizontal: 6),
visualDensity: VisualDensity.compact,
),
child: Text(
isDe ? 'DE' : 'EN',
style: FaiTheme.mono(
size: 11,
weight: FontWeight.w600,
color: Theme.of(context).colorScheme.primary,
),
),
),
);
},
);
}
}