fix: setState callback must not return the reload future

Signed-off-by: flemming-it <sf@flemming.it>

CHANGELOG.md

@@ -1,5 +1,111 @@
 # Changelog
 
+## 0.26.0
+
+Sample flows follow the hub's wire flag (sealed-areas rework):
+
+- **`FlowEditorPage.sampleFlowNames`** — the host passes the set of
+  flow names the hub reports as bundled samples
+  (`FlowSummary.sample`). This is now the ONLY source of the
+  "Example" chip; the editor's own content-marker scan is gone (it
+  had silently drifted from the hub's renamed sample header and
+  missed every current sample). Null = no host info = no chips.
+- **Examples group.** Sample flows collapse under one
+  "Examples (N)" row below the operator's own flows, expanded on
+  demand — or by default when there is nothing else to show.
+- **`FlowEditorPage.onImportSamples`** — optional empty-list action
+  ("Import example flows"); sealed areas start without samples, so
+  hosts wire this as the deliberate pull. The list refreshes itself
+  after the import.
+- `FaiEmptyState` gained an optional `action` slot.
+- The editor reloads its file list when the host changes `flowsDir`
+  or delivers the sample set after an async fetch.
+
+## 0.25.0
+
+Honest install badge — the flow list and analyzer only offer
+"Install" for capabilities a configured store can actually resolve:
+
+- **Store-resolvability split in the flow list.** Missing
+  capabilities are classified BEFORE any click: store-resolvable
+  ones keep the amber chip + Install link (which now installs only
+  those), the rest render a quiet "not in store" chip whose tooltip
+  explains the three recovery paths (local install via
+  `chain install --link`, adding the providing store, configuring
+  the MCP/n8n integration). Previously the Install action covered
+  every missing capability and could end in the hub's
+  "no store entry for '<name>'" error.
+- New host contract: `_FileList` consumes the host's
+  `storeCapabilities` (already exposed on `FlowEditorPage`) for the
+  split; hosts should pass only capabilities the store can install
+  (installable status, native kind).
+- **Analyzer not-in-store message** now names all three recovery
+  paths instead of only the local-install hint (EN + DE).
+
+Project separation in the flow list:
+
+- **Workspace filter.** The file list filters by the host's
+  `activeProject`; flows without a `project:` key count as
+  `general` (display semantics — the file stays the truth and is
+  never rewritten). A project with no flows gets its own honest
+  empty state naming the project and the way out.
+- **New flows are stamped** with the active project's `project:`
+  key (`general` and "all projects" stay unstamped — no key
+  already means general).
+- **`toolbarTrailing` slot** on `FlowEditorPage`: the host can
+  place its workspace switcher in the editor's single toolbar.
+- **`flowsDir` injection** on `FlowEditorPage`: tests (and other
+  hosts) point the editor at any directory instead of the
+  hard-wired `~/.chain/data/flows` — the new widget tests run
+  against a temp dir, never the operator's flows.
+
+Disturbance hardening:
+
+- **Unknown ≠ absent.** `storeCapabilities` is nullable now
+  (null = store state unknown): missing capabilities then render
+  the plain missing chip with an honest tooltip — no install
+  offer, no "not in store" claim — and the analyzer message says
+  the store cannot be checked right now (EN + DE). Previously an
+  unreachable store made every missing capability claim
+  "not in store".
+
+## 0.24.1
+
+- No ALL-CAPS "FLOWS" panel header: the page toolbar already names
+  the page — the duplicate label read as a broken title hierarchy.
+  The refresh action moved next to the list filter.
+- Doc comments name the current CLI (`chain install`).
+
+## 0.24.0
+
+Usertest-panel fixes (flow list + language):
+
+- **Builtin-capability truth from the hub.** Removed the hardcoded
+  client-side builtin set (`{'debug.echo'}`): missing-module
+  detection now trusts the host-supplied capability list alone,
+  which already includes the hub's real builtins. Fixes the bundled
+  `hello` flow showing a play button on hubs that don't have
+  `debug.echo` installed.
+- **Missing-modules badge redesigned.** Status ("N Module fehlen",
+  quiet neutral chip with an amber dot) and the install action
+  (own link, never truncated) are separate elements; the former
+  combined orange chip read as an error wall and ellipsized the
+  action word.
+- **Flow-list filter.** Case-insensitive substring filter above the
+  list, with an honest "no flow matches" empty state.
+- **Formal address (Sie) in all German strings** plus missing
+  commas/quotes in the empty-state sentences.
+- Analyzer hint now names the current CLI (`chain install --link`,
+  was `fai install --link`).
+
+## 0.23.0
+
+- Run tab file inputs accept a host-injected native file picker
+  (`FlowEditorPage.onPickFile`, new `PickedFileData` /
+  `PickFileCallback` contract). The manual path-entry dialog remains
+  only as the no-host fallback — typing an absolute path by hand is
+  a last resort, not an input method.
+
 All notable changes to `chain_studio_flow_editor` recorded here.
 Studio bumps its `pubspec.yaml` git ref to a specific release
 of this package on every editor change.

lib/chain_studio_flow_editor.dart

@@ -40,6 +40,8 @@ export 'src/run_driver.dart'
     show
         FlowRunDriver,
         FlowRunEvent,
+        PickedFileData,
+        PickFileCallback,
         StepStarted,
         StepCompleted,
         StepFailed,

lib/src/flow_analyzer.dart

@@ -38,13 +38,14 @@ class FlowAnalyzer extends AbstractAnalyzer {
   /// rebuild.
   final List<String> Function() availableCapabilities;
 
-  /// Returns the names of capabilities the public store knows
-  /// how to install. Used to decide whether an unknown-cap
-  /// issue should carry an Install button — clicking the
-  /// button on a capability the hub can't actually fetch would
-  /// just fail. Null = "no store available" → install offered
-  /// for every unknown cap (legacy behaviour).
-  final List<String> Function()? storeCapabilities;
+  /// Returns the names of capabilities the store can actually
+  /// install, or null when the store state is UNKNOWN (snapshot
+  /// not loaded / store unreachable). Drives whether an
+  /// unknown-cap issue carries an Install button (in store), the
+  /// "not in store" recovery message (known, absent) or the
+  /// neutral store-unknown wording (null) — the analyzer never
+  /// claims "no store provides it" without a loaded snapshot.
+  final List<String>? Function()? storeCapabilities;
 
   /// Quick fixes attached to the most-recent analyze() pass.
   /// Keyed by the same `Issue` instances that landed in
@@ -111,9 +112,10 @@ class FlowAnalyzer extends AbstractAnalyzer {
     // as Did-you-mean candidates so the suggestion can preserve
     // the version constraint when the user already typed one.
     final installedFull = caps.toSet();
-    final storeCaps =
-        storeCapabilities?.call() ?? const <String>[];
-    final storeBare = storeCaps.map(_bareCap).toSet();
+    final storeCaps = storeCapabilities?.call();
+    final storeKnown = storeCaps != null;
+    final storeBare =
+        (storeCaps ?? const <String>[]).map(_bareCap).toSet();
 
     YamlNode? doc;
     try {
@@ -175,7 +177,9 @@ class FlowAnalyzer extends AbstractAnalyzer {
                 ? strings.unknownCapInStore(useValue)
                 : didYouMean != null
                     ? strings.unknownCapTypo(useValue, didYouMean)
-                    : strings.unknownCapNotInStore(useValue);
+                    : storeKnown
+                        ? strings.unknownCapNotInStore(useValue)
+                        : strings.unknownCapStoreUnknown(useValue);
             final issue = Issue(
               line: issueLine,
               message: message,

lib/src/flow_editor_page.dart

@@ -25,6 +25,7 @@ library;
 import 'dart:io';
 import 'dart:ui';
 
+import 'package:flutter/foundation.dart' show setEquals;
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_code_editor/flutter_code_editor.dart';
@@ -41,6 +42,7 @@ import 'tokens.dart';
 import 'widgets.dart';
 import 'widgets/capability_picker.dart';
 import 'widgets/flow_canvas.dart';
+import 'widgets/missing_modules_badge.dart';
 import 'widgets/properties_panel.dart';
 import 'widgets/run_tab.dart';
 
@@ -94,12 +96,17 @@ class FlowEditorPage extends StatefulWidget {
   /// then call the Hub install API.
   final AddModuleSourceCallback? onAddModuleSource;
 
-  /// Capabilities the public store knows how to install. The
-  /// analyzer uses this to decide whether to show "Install …"
-  /// (in store) or "Add source for …" (not in store) as the
-  /// quick-fix on an unknown `use:` line. Empty list = store
-  /// silent — no install button offered.
-  final List<String> storeCapabilities;
+  /// Capabilities the store can actually install, or null when
+  /// the store state is UNKNOWN (snapshot not loaded / store
+  /// unreachable). Drives the analyzer's quick-fix choice and
+  /// the flow list's badge: in store → Install; known-absent →
+  /// "not in store" + recovery paths; unknown → neither claim.
+  final List<String>? storeCapabilities;
+
+  /// Host-side native file picker for the Run tab's file inputs.
+  /// Studio passes a real file dialog; null keeps the manual
+  /// path-entry fallback.
+  final PickFileCallback? onPickFile;
 
   /// The host's active workspace/project slug (empty = "all
   /// projects", no active workspace). Used only to flag a
@@ -114,6 +121,32 @@ class FlowEditorPage extends StatefulWidget {
   /// (the mismatch note still shows — the file still wins).
   final void Function(String fileProject)? onSwitchToFileProject;
 
+  /// Host-injected widget rendered in the editor toolbar, before
+  /// the New-flow button. Studio places its workspace (project)
+  /// switcher here — the editor keeps a single toolbar and stays
+  /// host-agnostic.
+  final Widget? toolbarTrailing;
+
+  /// Directory the editor lists/saves flow files in. `null` uses
+  /// the hub's default (`~/.chain/data/flows`). Tests inject a
+  /// temp dir so they never touch the operator's real flows
+  /// (hermetic per shared/TESTING.md).
+  final String? flowsDir;
+
+  /// Names of the flows the HOST reports as bundled samples (the
+  /// hub's `FlowSummary.sample` wire flag). Null = the host has no
+  /// sample information (old hub / standalone use) — then no
+  /// example chips render at all. The hub's sample header is the
+  /// single source of truth; the editor no longer keeps its own
+  /// marker scan (it had already drifted from the hub's header).
+  final Set<String>? sampleFlowNames;
+
+  /// Import the bundled sample flows into the current hub.
+  /// Rendered as the action of the empty list state — sealed
+  /// areas start without examples, this is the deliberate pull.
+  /// Null hides the action.
+  final Future<void> Function()? onImportSamples;
+
   const FlowEditorPage({
     super.key,
     this.initialFlowName,
@@ -123,9 +156,14 @@ class FlowEditorPage extends StatefulWidget {
     this.style,
     this.onInstallCapability,
     this.onAddModuleSource,
-    this.storeCapabilities = const [],
+    this.storeCapabilities,
     this.activeProject = '',
     this.onSwitchToFileProject,
+    this.onPickFile,
+    this.toolbarTrailing,
+    this.flowsDir,
+    this.sampleFlowNames,
+    this.onImportSamples,
   });
 
   @override
@@ -172,6 +210,21 @@ class _FlowEditorPageState extends State<FlowEditorPage>
     }
   }
 
+  @override
+  void didUpdateWidget(covariant FlowEditorPage old) {
+    super.didUpdateWidget(old);
+    // The host may repoint the directory (connection switch) or
+    // deliver the hub's sample set after an async fetch — both
+    // change what the list must show.
+    if (widget.flowsDir != old.flowsDir ||
+        !setEquals(widget.sampleFlowNames, old.sampleFlowNames)) {
+      final fresh = _listFiles();
+      setState(() {
+        _files = fresh;
+      });
+    }
+  }
+
   @override
   void dispose() {
     _controller.codeController.hoverRequest.removeListener(_onHoverChanged);
@@ -276,7 +329,8 @@ class _FlowEditorPageState extends State<FlowEditorPage>
     final commentIdx = line.indexOf('#', colonIdx + 1);
     final rhsEnd = commentIdx < 0 ? line.length : commentIdx;
     final tail = commentIdx < 0 ? '' : line.substring(rhsEnd);
-    final newLine = '${line.substring(0, colonIdx + 1)} ${fix.replacement}'
+    final newLine =
+        '${line.substring(0, colonIdx + 1)} ${fix.replacement}'
         '${tail.isEmpty ? '' : ' $tail'}';
     if (newLine == line) return;
     lines[fix.line] = newLine;
@@ -285,8 +339,10 @@ class _FlowEditorPageState extends State<FlowEditorPage>
 
   // --- file ops ---
 
+  String get _flowsDir => widget.flowsDir ?? _defaultFlowsDir();
+
   Future<List<_FlowFile>> _listFiles() async {
-    final dir = Directory(_defaultFlowsDir());
+    final dir = Directory(_flowsDir);
     if (!dir.existsSync()) return <_FlowFile>[];
     final entries = await dir
         .list()
@@ -300,11 +356,13 @@ class _FlowEditorPageState extends State<FlowEditorPage>
       // by path + mtime so a refresh that didn't touch a file
       // doesn't re-read it, and a paint never re-reads at all.
       final meta = await _flowMetaCache.forFile(f, stat);
+      final name = f.uri.pathSegments.last.replaceAll(RegExp(r'\.yaml$'), '');
       files.add(
         _FlowFile(
-          name: f.uri.pathSegments.last.replaceAll(RegExp(r'\.yaml$'), ''),
+          name: name,
           path: f.path,
           sizeBytes: stat.size,
+          isExample: widget.sampleFlowNames?.contains(name) ?? false,
           meta: meta,
         ),
       );
@@ -325,7 +383,7 @@ class _FlowEditorPageState extends State<FlowEditorPage>
   }
 
   Future<void> _openByName(String name) async {
-    final path = '${_defaultFlowsDir()}/$name.yaml';
+    final path = '$_flowsDir/$name.yaml';
     final file = File(path);
     if (!file.existsSync()) return;
     final text = await file.readAsString();
@@ -368,7 +426,7 @@ class _FlowEditorPageState extends State<FlowEditorPage>
     if (name == null) return;
     _controller.saving = true;
     try {
-      final file = File('${_defaultFlowsDir()}/$name.yaml');
+      final file = File('$_flowsDir/$name.yaml');
       await file.writeAsString(
         _controller.codeController.fullText,
         flush: true,
@@ -412,11 +470,18 @@ class _FlowEditorPageState extends State<FlowEditorPage>
       builder: (ctx) => _NewFlowDialog(strings: _l),
     );
     if (name == null || name.isEmpty || !mounted) return;
+    // Stamp the active workspace project into the new file so the
+    // flow stays visible under the filter it was created in. The
+    // file wins from here on; `general` (and "all projects") stay
+    // unstamped — no key already means general.
+    final project = widget.activeProject;
+    final projectLine =
+        project.isEmpty || project == 'general' ? '' : 'project: $project\n';
     final template =
         '''# ${_l.newTemplateComment(name)}
 
 name: $name
-
+$projectLine
 inputs:
   text:
     type: text
@@ -431,7 +496,7 @@ outputs:
   result: \$echo.echoed
 ''';
     try {
-      final dir = Directory(_defaultFlowsDir());
+      final dir = Directory(_flowsDir);
       if (!dir.existsSync()) await dir.create(recursive: true);
       final file = File('${dir.path}/$name.yaml');
       if (file.existsSync()) {
@@ -569,6 +634,7 @@ outputs:
                 ? () => Navigator.of(context).maybePop()
                 : null,
             onNew: _newFlow,
+            trailing: widget.toolbarTrailing,
           ),
           const Divider(height: 1),
           Expanded(
@@ -581,9 +647,24 @@ outputs:
                     filesFuture: _files,
                     activeName: _controller.activeName,
                     strings: _l,
+                    onImportSamples: widget.onImportSamples == null
+                        ? null
+                        : () async {
+                            await widget.onImportSamples!();
+                            if (mounted) {
+                              final fresh = _listFiles();
+                              setState(() {
+                                _files = fresh;
+                              });
+                            }
+                          },
                     installedNames: _installedNames(
                       widget.availableCapabilities,
                     ),
+                    storeNames: widget.storeCapabilities == null
+                        ? null
+                        : _installedNames(widget.storeCapabilities!),
+                    activeProject: widget.activeProject,
                     onOpen: _openFile,
                     onRefresh: _refreshFiles,
                     onStart: _startFile,
@@ -637,7 +718,8 @@ outputs:
           errorCount: _controller.analyzerErrorCount,
           onAddStep: _controller.activeName != null ? _addStep : null,
           onSave: _controller.activeName != null ? _save : null,
-          onRun: _controller.activeName != null &&
+          onRun:
+              _controller.activeName != null &&
                   _controller.analyzerErrorCount == 0
               ? () => _tabs.animateTo(2)
               : null,
@@ -658,6 +740,7 @@ outputs:
                 controller: _controller,
                 strings: _l,
                 driver: widget.runDriver,
+                onPickFile: widget.onPickFile,
               ),
             ],
           ),
@@ -836,9 +919,7 @@ outputs:
         minLines: null,
         maxLines: null,
         gutterStyle: GutterStyle(
-          textStyle: mono.copyWith(
-            color: theme.colorScheme.onSurfaceVariant,
-          ),
+          textStyle: mono.copyWith(color: theme.colorScheme.onSurfaceVariant),
           background: theme.colorScheme.surfaceContainer,
           showLineNumbers: true,
           // Disable the built-in error column entirely — its
@@ -937,12 +1018,18 @@ class _Toolbar extends StatelessWidget {
   final bool dirty;
   final VoidCallback? onBack;
   final VoidCallback onNew;
+
+  /// Host-injected widget rendered before the New-flow button —
+  /// Studio places its workspace (project) switcher here so the
+  /// editor keeps a single toolbar and stays host-agnostic.
+  final Widget? trailing;
   const _Toolbar({
     required this.strings,
     required this.activeName,
     required this.dirty,
     required this.onBack,
     required this.onNew,
+    this.trailing,
   });
 
   @override
@@ -1011,6 +1098,10 @@ class _Toolbar extends StatelessWidget {
             ),
           ],
           const Spacer(),
+          if (trailing != null) ...[
+            trailing!,
+            const SizedBox(width: FaiSpace.md),
+          ],
           FilledButton.tonalIcon(
             onPressed: onNew,
             icon: const Icon(Icons.add, size: 16),
@@ -1120,9 +1211,7 @@ class _TabActionStrip extends StatelessWidget {
                             child: CircularProgressIndicator(strokeWidth: 2),
                           )
                         : Icon(
-                            errorCount > 0
-                                ? Icons.block
-                                : Icons.play_arrow,
+                            errorCount > 0 ? Icons.block : Icons.play_arrow,
                             size: 18,
                           ),
                     label: Text(strings.run),
@@ -1227,47 +1316,50 @@ class _FlowFile {
   final String path;
   final int sizeBytes;
 
-  /// Scan result for this file — whether it's a bundled example
-  /// and which capabilities its steps require. Computed once at
-  /// list-load time (see [_FlowMetaCache]).
+  /// True when the HOST reports this flow as a bundled sample
+  /// (hub wire flag) — never guessed from the file content.
+  final bool isExample;
+
+  /// Scan result for this file — which capabilities its steps
+  /// require. Computed once at list-load time (see
+  /// [_FlowMetaCache]).
   final _FlowMeta meta;
 
   const _FlowFile({
     required this.name,
     required this.path,
     required this.sizeBytes,
+    required this.isExample,
     required this.meta,
   });
 }
 
-/// Marker text every bundled sample flow carries in its
-/// provenance comment header. A file is an example iff its raw
-/// content contains this exact string.
-const String _sampleFlowMarker = 'F∆I sample flow';
-
-/// Built-in capabilities the Hub always provides, even when
-/// they aren't in the host-supplied installed list. Treated as
-/// satisfied so the "needs N modules" badge never flags them.
-const Set<String> _builtinCapabilities = {'debug.echo'};
-
-/// Result of scanning a single flow file: provenance + the
-/// capability NAMES (without `@version`) its steps reference.
+/// Result of scanning a single flow file: the capability NAMES
+/// (without `@version`) its steps reference.
 class _FlowMeta {
-  final bool isExample;
   final List<String> requiredCaps;
-  const _FlowMeta({required this.isExample, required this.requiredCaps});
 
-  static const empty = _FlowMeta(isExample: false, requiredCaps: []);
+  /// The file's own normalized `project:` slug; empty when the
+  /// YAML declares none (which counts as `general` for the list
+  /// filter — display semantics only, the file is never rewritten).
+  final String project;
+  const _FlowMeta({
+    required this.requiredCaps,
+    this.project = '',
+  });
 
-  /// Capabilities this flow needs that are neither installed nor
-  /// built in. [availableNames] is the set of installed
-  /// capability NAMES (the part before `@`).
-  List<String> missingCaps(Set<String> availableNames) => requiredCaps
-      .where(
-        (c) =>
-            !availableNames.contains(c) && !_builtinCapabilities.contains(c),
-      )
-      .toList();
+  static const empty = _FlowMeta(requiredCaps: []);
+
+  /// Capabilities this flow needs that the hub does not provide.
+  /// [availableNames] is the set of capability NAMES (the part
+  /// before `@`) from the host's live capability list — which
+  /// already includes the hub's builtins (e.g. system.approval),
+  /// so there is no client-side builtin list to drift out of
+  /// sync with the hub (the old hardcoded {'debug.echo'} made
+  /// the bundled hello flow look runnable on hubs that don't
+  /// have the module).
+  List<String> missingCaps(Set<String> availableNames) =>
+      requiredCaps.where((c) => !availableNames.contains(c)).toList();
 }
 
 /// Caches [_FlowMeta] per file, keyed by path + mtime. Reading
@@ -1294,12 +1386,11 @@ class _FlowMetaCache {
   }
 }
 
-/// Scan raw flow YAML for its example marker and the capability
-/// ids referenced by `use:` lines. A line scan is used rather
-/// than a full YAML parse: it's robust against malformed flows
-/// (the analyzer reports those separately) and never throws.
+/// Scan raw flow YAML for the capability ids referenced by
+/// `use:` lines. A line scan is used rather than a full YAML
+/// parse: it's robust against malformed flows (the analyzer
+/// reports those separately) and never throws.
 _FlowMeta _scanFlow(String text) {
-  final isExample = text.contains(_sampleFlowMarker);
   final caps = <String>{};
   final useRe = RegExp(r'^\s*-?\s*use:\s*(.+?)\s*$');
   for (final raw in text.split('\n')) {
@@ -1318,7 +1409,10 @@ _FlowMeta _scanFlow(String text) {
     final name = value.split('@').first.trim();
     if (name.isNotEmpty) caps.add(name);
   }
-  return _FlowMeta(isExample: isExample, requiredCaps: caps.toList());
+  return _FlowMeta(
+    requiredCaps: caps.toList(),
+    project: parseFlowProject(text),
+  );
 }
 
 /// Reduce the host-supplied installed list (entries like
@@ -1338,7 +1432,7 @@ String _formatBytes(int bytes) {
   return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
 }
 
-class _FileList extends StatelessWidget {
+class _FileList extends StatefulWidget {
   final Future<List<_FlowFile>> filesFuture;
   final String? activeName;
   final FlowEditorStrings strings;
@@ -1346,6 +1440,18 @@ class _FileList extends StatelessWidget {
   /// Bare capability NAMES the host reports as installed. Used
   /// to compute each row's missing-module count.
   final Set<String> installedNames;
+
+  /// Bare capability NAMES a configured store can install
+  /// (host-filtered to installable entries), or null when the
+  /// store state is unknown. Missing caps outside this set
+  /// render the "not in store" state instead of an install
+  /// action that the hub would refuse; with null neither claim
+  /// is made.
+  final Set<String>? storeNames;
+
+  /// Active workspace project slug; empty = all projects. Files
+  /// without a `project:` key count as `general`.
+  final String activeProject;
   final void Function(_FlowFile) onOpen;
   final VoidCallback onRefresh;
 
@@ -1359,46 +1465,105 @@ class _FileList extends StatelessWidget {
   /// renders, just without the one-click action.
   final Future<void> Function(List<String>)? onInstallMissing;
 
+  /// Import the bundled samples (empty-list action); null hides it.
+  final Future<void> Function()? onImportSamples;
+
   const _FileList({
     required this.filesFuture,
     required this.activeName,
     required this.strings,
+    this.onImportSamples,
     required this.installedNames,
+    required this.storeNames,
+    required this.activeProject,
     required this.onOpen,
     required this.onRefresh,
     required this.onStart,
     required this.onInstallMissing,
   });
 
+  @override
+  State<_FileList> createState() => _FileListState();
+}
+
+class _FileListState extends State<_FileList> {
+  /// Case-insensitive substring filter over flow names. First
+  /// iteration of "find a flow fast" (usertest power-user
+  /// finding: no search over the flow list at all).
+  String _filter = '';
+
+  /// Whether the examples group is expanded. Null until the
+  /// operator toggles it — the default then follows the content
+  /// (expanded only when there are no own flows).
+  bool? _samplesExpanded;
+
+  /// Guards the empty-state import button against double-taps.
+  bool _importing = false;
+
+  Future<void> _runImport() async {
+    setState(() => _importing = true);
+    try {
+      await widget.onImportSamples!();
+    } finally {
+      if (mounted) setState(() => _importing = false);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final strings = widget.strings;
     return Container(
       color: theme.colorScheme.surface,
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
-          Container(
-            padding: const EdgeInsets.symmetric(
-              horizontal: FaiSpace.md,
-              vertical: FaiSpace.xs,
-            ),
-            decoration: BoxDecoration(
-              border: Border(bottom: BorderSide(color: theme.dividerColor)),
+          // No ALL-CAPS panel header: the page toolbar already says
+          // "Flows" — the duplicate label read as a broken title
+          // hierarchy (usertest art-director finding). The refresh
+          // action sits next to the filter instead.
+          Padding(
+            padding: const EdgeInsets.fromLTRB(
+              FaiSpace.md,
+              FaiSpace.xs,
+              FaiSpace.md,
+              FaiSpace.xs,
             ),
             child: Row(
               children: [
                 Expanded(
-                  child: Text(
-                    strings.listHeader,
-                    style: theme.textTheme.labelSmall?.copyWith(
+                  child: SizedBox(
+                    height: 28,
+                    child: TextField(
+                      onChanged: (v) => setState(() => _filter = v.trim()),
+                      style: theme.textTheme.bodySmall,
+                      decoration: InputDecoration(
+                        isDense: true,
+                        contentPadding: const EdgeInsets.symmetric(
+                          horizontal: 8,
+                          vertical: 4,
+                        ),
+                        prefixIcon: const Icon(Icons.search, size: 14),
+                        prefixIconConstraints: const BoxConstraints(
+                          minWidth: 28,
+                          minHeight: 28,
+                        ),
+                        hintText: strings.listFilterHint,
+                        hintStyle: theme.textTheme.bodySmall?.copyWith(
                           color: theme.colorScheme.onSurfaceVariant,
-                      letterSpacing: 0.6,
+                        ),
+                        border: OutlineInputBorder(
+                          borderRadius: BorderRadius.circular(FaiRadius.sm),
+                          borderSide: BorderSide(
+                            color: theme.colorScheme.outlineVariant,
+                          ),
+                        ),
+                      ),
                     ),
                   ),
                 ),
                 IconButton(
-                  onPressed: onRefresh,
+                  onPressed: widget.onRefresh,
                   tooltip: strings.refresh,
                   icon: const Icon(Icons.refresh, size: 16),
                   visualDensity: VisualDensity.compact,
@@ -1418,8 +1583,9 @@ class _FileList extends StatelessWidget {
   }
 
   Widget _buildBody(BuildContext context, ThemeData theme) {
+    final strings = widget.strings;
     return FutureBuilder<List<_FlowFile>>(
-      future: filesFuture,
+      future: widget.filesFuture,
       builder: (context, snap) {
         if (snap.connectionState == ConnectionState.waiting) {
           return const Center(child: CircularProgressIndicator());
@@ -1430,26 +1596,132 @@ class _FileList extends StatelessWidget {
             child: ChainErrorBox(error: snap.error, isError: true),
           );
         }
-        final files = snap.data ?? <_FlowFile>[];
-        if (files.isEmpty) {
+        final all = snap.data ?? <_FlowFile>[];
+        if (all.isEmpty) {
           return Padding(
             padding: const EdgeInsets.all(FaiSpace.md),
             child: FaiEmptyState(
               icon: Icons.folder_outlined,
               title: strings.listEmptyTitle,
               hint: strings.listEmptyBody,
+              // Sealed areas start without examples — offer the
+              // deliberate pull right where the emptiness shows.
+              action: widget.onImportSamples == null
+                  ? null
+                  : OutlinedButton.icon(
+                      onPressed: _importing ? null : _runImport,
+                      icon: const Icon(Icons.download_outlined, size: 16),
+                      label: Text(strings.flowListSamplesImport),
+                    ),
             ),
           );
         }
-        return ListView.builder(
+        // Workspace filter first: files without a `project:` key
+        // count as `general` (display semantics — the file is the
+        // truth and never rewritten).
+        final inProject = all
+            .where(
+              (f) => flowVisibleInProject(
+                f.meta.project,
+                widget.activeProject,
+              ),
+            )
+            .toList();
+        if (inProject.isEmpty) {
+          // Flows exist, just none in this project — say that and
+          // point at the way out (switch to all projects).
+          return Padding(
+            padding: const EdgeInsets.all(FaiSpace.md),
+            child: FaiEmptyState(
+              icon: Icons.folder_off_outlined,
+              title: strings.listProjectEmpty(widget.activeProject),
+              hint: strings.listProjectEmptyHint,
+            ),
+          );
+        }
+        final needle = _filter.toLowerCase();
+        final files = needle.isEmpty
+            ? inProject
+            : inProject
+                  .where((f) => f.name.toLowerCase().contains(needle))
+                  .toList();
+        if (files.isEmpty) {
+          // Flows exist, the filter just matches none — say that
+          // instead of pretending the directory is empty.
+          return Padding(
+            padding: const EdgeInsets.all(FaiSpace.md),
+            child: FaiEmptyState(
+              icon: Icons.search_off_outlined,
+              title: strings.listFilterNoMatch(_filter),
+              hint: null,
+            ),
+          );
+        }
+        // Grouping: the operator's own flows first; bundled
+        // examples collapsed under one labelled group so samples
+        // are never mistaken for area work (they expand by
+        // default only when there is nothing else to show).
+        final own = files.where((f) => !f.isExample).toList();
+        final samples = files.where((f) => f.isExample).toList();
+        final samplesExpanded = _samplesExpanded ?? own.isEmpty;
+        return ListView(
           padding: const EdgeInsets.symmetric(vertical: FaiSpace.xs),
-          itemCount: files.length,
-          itemBuilder: (_, i) {
-            final f = files[i];
-            final isActive = f.name == activeName;
-            final missing = f.meta.missingCaps(installedNames);
+          children: [
+            for (final f in own) _row(theme, f),
+            if (samples.isNotEmpty) ...[
+              InkWell(
+                onTap: () =>
+                    setState(() => _samplesExpanded = !samplesExpanded),
+                child: Padding(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: FaiSpace.md,
+                    vertical: FaiSpace.sm,
+                  ),
+                  child: Row(
+                    children: [
+                      Icon(
+                        Icons.auto_awesome_outlined,
+                        size: 14,
+                        color: theme.colorScheme.onSurfaceVariant,
+                      ),
+                      const SizedBox(width: FaiSpace.sm),
+                      Expanded(
+                        child: Text(
+                          strings.flowListSamplesGroup(samples.length),
+                          style: theme.textTheme.bodySmall?.copyWith(
+                            color: theme.colorScheme.onSurfaceVariant,
+                            fontWeight: FontWeight.w600,
+                          ),
+                          overflow: TextOverflow.ellipsis,
+                        ),
+                      ),
+                      Icon(
+                        samplesExpanded
+                            ? Icons.expand_less
+                            : Icons.expand_more,
+                        size: 16,
+                        color: theme.colorScheme.onSurfaceVariant,
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+              if (samplesExpanded) for (final f in samples) _row(theme, f),
+            ],
+          ],
+        );
+      },
+    );
+  }
+
+  Widget _row(ThemeData theme, _FlowFile f) {
+    final strings = widget.strings;
+    {
+            final isActive = f.name == widget.activeName;
+            final missing = f.meta.missingCaps(widget.installedNames);
+            final split = splitMissingCaps(missing, widget.storeNames);
             return InkWell(
-              onTap: () => onOpen(f),
+              onTap: () => widget.onOpen(f),
               child: Container(
                 padding: const EdgeInsets.symmetric(
                   horizontal: FaiSpace.md,
@@ -1516,21 +1788,30 @@ class _FileList extends StatelessWidget {
                               fontSize: 11,
                             ),
                           ),
-                          if (f.meta.isExample || missing.isNotEmpty) ...[
+                          if (f.isExample || missing.isNotEmpty) ...[
                             const SizedBox(height: FaiSpace.xs),
                             Wrap(
                               spacing: FaiSpace.xs,
                               runSpacing: FaiSpace.xs,
                               children: [
-                                if (f.meta.isExample)
+                                if (f.isExample)
                                   _ExampleBadge(strings: strings),
                                 if (missing.isNotEmpty)
-                                  _MissingModulesBadge(
-                                    missing: missing,
+                                  MissingModulesBadge(
+                                    installable: split.installable,
+                                    notInStore: split.notInStore,
+                                    unclassified: split.unclassified,
                                     strings: strings,
-                                    onInstall: onInstallMissing == null
+                                    // Install only what the store
+                                    // resolves — the not-in-store
+                                    // chip explains the rest.
+                                    onInstall:
+                                        widget.onInstallMissing == null ||
+                                            split.installable.isEmpty
                                         ? null
-                                        : () => onInstallMissing!(missing),
+                                        : () => widget.onInstallMissing!(
+                                            split.installable,
+                                          ),
                                   ),
                               ],
                             ),
@@ -1543,7 +1824,7 @@ class _FileList extends StatelessWidget {
                     // the install badge is the actionable path then.
                     if (missing.isEmpty)
                       IconButton(
-                        onPressed: () => onStart(f),
+                        onPressed: () => widget.onStart(f),
                         tooltip: strings.listStartTooltip,
                         icon: Icon(
                           Icons.play_arrow_rounded,
@@ -1561,10 +1842,7 @@ class _FileList extends StatelessWidget {
                 ),
               ),
             );
-          },
-        );
-      },
-    );
+    }
   }
 }
 
@@ -1610,72 +1888,6 @@ class _ExampleBadge extends StatelessWidget {
   }
 }
 
-/// Warning-toned "needs N modules" chip on flows whose steps
-/// reference capabilities that aren't installed. Tooltip lists
-/// the exact missing ids. When an install handler is wired, the
-/// chip is tappable and one-click installs all missing caps via
-/// the host's existing install path.
-class _MissingModulesBadge extends StatelessWidget {
-  final List<String> missing;
-  final FlowEditorStrings strings;
-  final VoidCallback? onInstall;
-  const _MissingModulesBadge({
-    required this.missing,
-    required this.strings,
-    required this.onInstall,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    // Amber warning tone consistent with the diagnostic strip's
-    // warning colour, readable on both light + dark surfaces.
-    const warn = Color(0xFFEF6C00);
-    final label = '${strings.flowListNeedsModules(missing.length)}'
-        '${onInstall != null ? ' · ${strings.flowListInstallMissing}' : ''}';
-    final chip = Container(
-      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
-      decoration: BoxDecoration(
-        color: warn.withValues(alpha: 0.12),
-        borderRadius: BorderRadius.circular(FaiRadius.sm),
-        border: Border.all(color: warn.withValues(alpha: 0.5)),
-      ),
-      child: Row(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          const Icon(Icons.extension_off_outlined, size: 10, color: warn),
-          const SizedBox(width: 4),
-          // Flexible + ellipsis: the chip sits in the narrow flow
-          // list, where the full label otherwise overflows by a few
-          // pixels (the tooltip still carries the complete text).
-          Flexible(
-            child: Text(
-              label,
-              overflow: TextOverflow.ellipsis,
-              style: theme.textTheme.labelSmall?.copyWith(
-                color: warn,
-                fontSize: 10,
-                fontWeight: FontWeight.w600,
-                letterSpacing: 0.2,
-              ),
-            ),
-          ),
-        ],
-      ),
-    );
-    return Tooltip(
-      message: strings.flowListNeedsModulesTooltip(missing.join('\n')),
-      child: onInstall == null
-          ? chip
-          : InkWell(
-              onTap: onInstall,
-              borderRadius: BorderRadius.circular(FaiRadius.sm),
-              child: chip,
-            ),
-    );
-  }
-}
-
 // --- empty state ---
 
 class _EmptyState extends StatelessWidget {
@@ -1933,8 +2145,10 @@ class _DiagnosticStripState extends State<_DiagnosticStrip> {
             InkWell(
               onTap: () => setState(() => _expanded = !_expanded),
               child: Padding(
-                padding:
-                    const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
+                padding: const EdgeInsets.symmetric(
+                  horizontal: 12,
+                  vertical: 6,
+                ),
                 child: Row(
                   children: [
                     Container(
@@ -2128,16 +2342,10 @@ class _IssueRow extends StatelessWidget {
                       child: CircularProgressIndicator(strokeWidth: 2),
                     )
                   : const Icon(Icons.auto_fix_high, size: 13),
-              label: Text(
-                fix.label,
-                style: _monoTextStyle(size: 11),
-              ),
+              label: Text(fix.label, style: _monoTextStyle(size: 11)),
               style: FilledButton.styleFrom(
                 visualDensity: VisualDensity.compact,
-                padding: const EdgeInsets.symmetric(
-                  horizontal: 8,
-                  vertical: 4,
-                ),
+                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                 minimumSize: const Size(0, 24),
               ),
             ),
@@ -2186,7 +2394,10 @@ class _IssueHoverCard extends StatelessWidget {
     // to viewport so the card never spills off-screen on a
     // narrow window.
     const cardWidth = 380.0;
-    final maxLeft = (media.size.width - cardWidth - 12).clamp(8.0, double.infinity);
+    final maxLeft = (media.size.width - cardWidth - 12).clamp(
+      8.0,
+      double.infinity,
+    );
     final dx = (request.globalPosition.dx + 12).clamp(8.0, maxLeft);
     final dy = (request.globalPosition.dy + 18).clamp(
       8.0,
@@ -2206,9 +2417,7 @@ class _IssueHoverCard extends StatelessWidget {
             decoration: BoxDecoration(
               color: theme.colorScheme.surfaceContainerHigh,
               borderRadius: BorderRadius.circular(8),
-              border: Border.all(
-                color: theme.colorScheme.outlineVariant,
-              ),
+              border: Border.all(color: theme.colorScheme.outlineVariant),
               boxShadow: const [
                 BoxShadow(
                   color: Color(0x33000000),
@@ -2359,11 +2568,7 @@ class _FixDialogState extends State<_FixDialog> {
     return AlertDialog(
       title: Row(
         children: [
-          Icon(
-            Icons.auto_fix_high,
-            size: 20,
-            color: theme.colorScheme.primary,
-          ),
+          Icon(Icons.auto_fix_high, size: 20, color: theme.colorScheme.primary),
           const SizedBox(width: 8),
           Text(strings.diagnosticFixDialogTitle),
         ],
@@ -2485,10 +2690,7 @@ class _FixDialogRow extends StatelessWidget {
                     FilledButton.tonalIcon(
                       onPressed: () => onApplyFix(fix),
                       icon: const Icon(Icons.auto_fix_high, size: 13),
-                      label: Text(
-                        fix.label,
-                        style: _monoTextStyle(size: 11),
-                      ),
+                      label: Text(fix.label, style: _monoTextStyle(size: 11)),
                     ),
                 ],
               ),

lib/src/flow_project.dart

@@ -24,6 +24,21 @@ String parseFlowProject(String yaml) {
   return '';
 }
 
+/// The project a flow file effectively belongs to: its own
+/// `project:` slug, or `general` when the file declares none.
+/// Display/filter semantics only — the FILE stays the truth and
+/// is never rewritten to make this explicit.
+String effectiveFlowProject(String fileProject) =>
+    fileProject.isEmpty ? 'general' : fileProject;
+
+/// Whether a flow file belongs in the list under the active
+/// workspace filter. Empty [activeProject] = "all projects";
+/// otherwise the file's effective project (no key = `general`)
+/// must match.
+bool flowVisibleInProject(String fileProject, String activeProject) =>
+    activeProject.isEmpty ||
+    effectiveFlowProject(fileProject) == activeProject;
+
 /// Mirror of the hub's `normalize_project_slug`: lowercase,
 /// collapse spaces/underscores/dashes to a single `-`, drop
 /// everything else, trim trailing dashes. Empty in → empty out

lib/src/flow_yaml_controller.dart

@@ -30,7 +30,7 @@ import 'wire_colors.dart';
 class FlowYamlCodeController extends CodeController {
   FlowYamlCodeController({
     List<String> Function()? availableCapabilities,
-    List<String> Function()? storeCapabilities,
+    List<String>? Function()? storeCapabilities,
     AnalyzerStrings analyzerStrings = AnalyzerStrings.english,
   }) : super(
          text: '',
@@ -49,7 +49,7 @@ class FlowYamlCodeController extends CodeController {
   /// closure or stale strings inside an old FlowAnalyzer.
   void setCapabilityProviders({
     required List<String> Function() available,
-    List<String> Function()? store,
+    List<String>? Function()? store,
     AnalyzerStrings? strings,
   }) {
     analyzer = FlowAnalyzer(
@@ -108,7 +108,7 @@ class FlowYamlCodeController extends CodeController {
 
   /// Replace the analyzer's capability provider. Called by the
   /// editor host when the installed-capability list changes —
-  /// e.g. after `fai install` while the editor is open.
+  /// e.g. after `chain install` while the editor is open.
   void setAvailableCapabilities(List<String> Function() provider) {
     analyzer = FlowAnalyzer(availableCapabilities: provider);
   }

lib/src/l10n.dart

@@ -17,7 +17,6 @@ class FlowEditorStrings {
   String get save => _t('Save', 'Speichern');
   String get run => _t('Run', 'Ausführen');
   String get refresh => _t('Refresh file list', 'Datei-Liste neu laden');
-  String get listHeader => _t('FLOWS', 'FLOWS');
   String get listStartTooltip =>
       _t('Open on the Run tab', 'Im Starten-Tab öffnen');
   String get copy => _t('Copy', 'Kopieren');
@@ -28,13 +27,14 @@ class FlowEditorStrings {
   String get emptyTitle => _t('No flow open', 'Kein Flow geöffnet');
   String get emptyBody => _t(
     'Pick one from the left, or click New flow to start a fresh one.',
-    'Wähle links einen aus oder klicke Neuer Flow um einen neuen anzulegen.',
+    'Wählen Sie links einen Flow aus oder klicken Sie auf „Neuer Flow", '
+        'um einen neuen anzulegen.',
   );
   String get listEmptyTitle =>
       _t('No saved flows', 'Keine gespeicherten Flows');
   String get listEmptyBody => _t(
     'Click New flow to scaffold one from a template.',
-    'Klicke Neuer Flow um aus einer Vorlage zu starten.',
+    'Klicken Sie auf „Neuer Flow", um aus einer Vorlage zu starten.',
   );
   String get discardTitle =>
       _t('Discard unsaved changes?', 'Ungespeicherte Änderungen verwerfen?');
@@ -95,14 +95,15 @@ class FlowEditorStrings {
   String get graphEmptyTitle => _t('No steps yet', 'Noch keine Schritte');
   String get graphEmptyBody => _t(
     'Click Add step to drop the first capability onto the canvas.',
-    'Klicke Schritt hinzufügen um die erste Capability auf die Fläche zu setzen.',
+    'Klicken Sie auf „Schritt hinzufügen", um die erste Capability auf '
+        'die Fläche zu setzen.',
   );
 
   // Properties panel.
   String get propPanelTitle => _t('Step details', 'Schritt-Details');
   String get propNoSelection => _t(
     'Click a step on the canvas to edit it.',
-    'Klicke einen Schritt auf der Fläche an, um ihn zu bearbeiten.',
+    'Klicken Sie einen Schritt auf der Fläche an, um ihn zu bearbeiten.',
   );
   String get propStepId => _t('ID', 'ID');
   String get propCapability => _t('Capability', 'Capability');
@@ -142,11 +143,12 @@ class FlowEditorStrings {
   String get runStart => _t('Start run', 'Lauf starten');
   String get runUnsavedBanner => _t(
     'You have unsaved changes — save first to run the latest version.',
-    'Du hast ungespeicherte Änderungen — bitte zuerst speichern, um die neueste Version auszuführen.',
+    'Sie haben ungespeicherte Änderungen — bitte zuerst speichern, um die '
+        'neueste Version auszuführen.',
   );
   String get runNoFlow => _t(
     'Open a flow from the left to run it.',
-    'Öffne links einen Flow um ihn auszuführen.',
+    'Öffnen Sie links einen Flow, um ihn auszuführen.',
   );
   String get runOutputs => _t('Outputs', 'Ausgaben');
   String get runChooseFile => _t('Choose file…', 'Datei wählen…');
@@ -253,15 +255,28 @@ class FlowEditorStrings {
       );
   String analyzerUnknownCapTypo(String cap, String suggestion) => _t(
         'Unknown capability "$cap". Did you mean "$suggestion"?',
-        'Unbekannte Capability "$cap". Meintest du "$suggestion"?',
+        'Unbekannte Capability "$cap". Meinten Sie "$suggestion"?',
       );
   String analyzerUnknownCapNotInStore(String cap) => _t(
         'Unknown capability "$cap". '
-            'Not in the store — install locally with '
-            '`fai install --link <path>` or check the spelling.',
+            'No configured store can install it — install a local module '
+            '(`chain install --link <path>`), add the store that provides '
+            'it, or configure the integration (MCP/n8n) that supplies it.',
         'Unbekannte Capability "$cap". '
-            'Nicht im Store — lokal mit '
-            '`fai install --link <pfad>` installieren oder Tippfehler prüfen.',
+            'Kein eingerichteter Store kann sie installieren — lokales '
+            'Modul installieren (`chain install --link <pfad>`), den '
+            'passenden Store hinzufügen oder die Anbindung (MCP/n8n) '
+            'einrichten, die sie bereitstellt.',
+      );
+  String analyzerUnknownCapStoreUnknown(String cap) => _t(
+        'Unknown capability "$cap". '
+            'The store is not reachable right now, so it may or may not '
+            'be installable — check the spelling, or add a local source '
+            '(`chain install --link <path>`).',
+        'Unbekannte Capability "$cap". '
+            'Der Store ist gerade nicht erreichbar — ob sie installierbar '
+            'ist, lässt sich nicht sagen. Tippfehler prüfen oder lokale '
+            'Quelle hinzufügen (`chain install --link <pfad>`).',
       );
   String analyzerInputKind() => _t('input', 'Eingabe');
   String analyzerOutputKind() => _t('output', 'Ausgabe');
@@ -279,9 +294,13 @@ class FlowEditorStrings {
         'Bundled sample flow.',
         'Mitgelieferter Beispiel-Flow.',
       );
+  String flowListSamplesGroup(int n) =>
+      _t('Examples ($n)', 'Beispiele ($n)');
+  String get flowListSamplesImport =>
+      _t('Import example flows', 'Beispiel-Flows importieren');
   String flowListNeedsModules(int n) => _t(
-        n == 1 ? 'needs 1 module' : 'needs $n modules',
-        n == 1 ? 'braucht 1 Modul' : 'braucht $n Module',
+        n == 1 ? '1 module missing' : '$n modules missing',
+        n == 1 ? '1 Modul fehlt' : '$n Module fehlen',
       );
   String flowListNeedsModulesTooltip(String caps) => _t(
         'This flow needs capabilities that are not installed:\n$caps\n'
@@ -290,6 +309,52 @@ class FlowEditorStrings {
             'Klicken, um die fehlenden zu installieren.',
       );
   String get flowListInstallMissing => _t('Install', 'Installieren');
+  String flowListNeedsModulesTooltipNoAction(String caps) => _t(
+        'This flow needs capabilities that are not installed:\n$caps\n'
+            'The store is not reachable right now — no install offer '
+            'until Studio can check it.',
+        'Dieser Flow braucht nicht installierte Capabilities:\n$caps\n'
+            'Der Store ist gerade nicht erreichbar — kein Install-Angebot, '
+            'bis Studio das prüfen kann.',
+      );
+  String flowListNotInStore(int n) => _t(
+        n == 1 ? 'not in store' : '$n not in store',
+        n == 1 ? 'nicht im Store' : '$n nicht im Store',
+      );
+  String flowListNotInStoreTooltip(String caps) => _t(
+        'This flow needs capabilities no configured store can install:\n'
+            '$caps\n'
+            'Ways to get them: install a local module '
+            '(`chain install --link <path>`), add the store that provides '
+            'them (Settings → Stores), or configure the integration '
+            '(MCP/n8n) that supplies the capability.',
+        'Dieser Flow braucht Capabilities, die kein eingerichteter Store '
+            'installieren kann:\n$caps\n'
+            'Wege: lokales Modul installieren '
+            '(`chain install --link <pfad>`), den passenden Store '
+            'hinzufügen (Einstellungen → Stores) oder die Anbindung '
+            '(MCP/n8n) einrichten, die die Capability bereitstellt.',
+      );
+
+  // Project-scoped empty state: flows exist, none in the active
+  // workspace project.
+  String listProjectEmpty(String project) => _t(
+        'No flows in project "$project".',
+        'Keine Flows im Projekt „$project".',
+      );
+  String get listProjectEmptyHint => _t(
+        'New flow puts one here, or switch the project selector to '
+            '"All projects".',
+        '„Neuer Flow" legt hier einen an — oder wechseln Sie die '
+            'Projekt-Auswahl auf „Alle Projekte".',
+      );
+
+  // Flow-list filter (first iteration: plain substring match).
+  String get listFilterHint => _t('Filter flows…', 'Flows filtern…');
+  String listFilterNoMatch(String query) => _t(
+        'No flow matches "$query".',
+        'Kein Flow passt zu „$query".',
+      );
 
   // Quick-fix button labels.
   String fixInstallCap(String cap) => _t('Install $cap', '$cap installieren');
@@ -309,6 +374,7 @@ class AnalyzerStrings {
   final String Function(String cap) unknownCapInStore;
   final String Function(String cap, String suggestion) unknownCapTypo;
   final String Function(String cap) unknownCapNotInStore;
+  final String Function(String cap) unknownCapStoreUnknown;
   final String Function(String kind, String value, String validList)
       unknownType;
   final String Function() inputKind;
@@ -324,6 +390,7 @@ class AnalyzerStrings {
     required this.unknownCapInStore,
     required this.unknownCapTypo,
     required this.unknownCapNotInStore,
+    required this.unknownCapStoreUnknown,
     required this.unknownType,
     required this.inputKind,
     required this.outputKind,
@@ -342,6 +409,7 @@ class AnalyzerStrings {
         unknownCapInStore: s.analyzerUnknownCapInStore,
         unknownCapTypo: s.analyzerUnknownCapTypo,
         unknownCapNotInStore: s.analyzerUnknownCapNotInStore,
+        unknownCapStoreUnknown: s.analyzerUnknownCapStoreUnknown,
         unknownType: s.analyzerUnknownType,
         inputKind: s.analyzerInputKind,
         outputKind: s.analyzerOutputKind,
@@ -362,6 +430,7 @@ class AnalyzerStrings {
       : unknownCapInStore = _enUnknownCapInStore,
         unknownCapTypo = _enUnknownCapTypo,
         unknownCapNotInStore = _enUnknownCapNotInStore,
+        unknownCapStoreUnknown = _enUnknownCapStoreUnknown,
         unknownType = _enUnknownType,
         inputKind = _enInputKind,
         outputKind = _enOutputKind,
@@ -378,8 +447,14 @@ class AnalyzerStrings {
       'Unknown capability "$cap". Did you mean "$suggestion"?';
   static String _enUnknownCapNotInStore(String cap) =>
       'Unknown capability "$cap". '
-      'Not in the store — install locally with '
-      '`fai install --link <path>` or check the spelling.';
+      'No configured store can install it — install a local module '
+      '(`chain install --link <path>`), add the store that provides '
+      'it, or configure the integration (MCP/n8n) that supplies it.';
+  static String _enUnknownCapStoreUnknown(String cap) =>
+      'Unknown capability "$cap". '
+      'The store is not reachable right now, so it may or may not '
+      'be installable — check the spelling, or add a local source '
+      '(`chain install --link <path>`).';
   static String _enUnknownType(String kind, String value, String validList) =>
       'Unknown $kind type "$value". Use one of: $validList.';
   static String _enInputKind() => 'input';

lib/src/quick_fix.dart

@@ -69,12 +69,12 @@ class InstallCapabilityFix extends QuickFix {
 /// Ask the host to register a new module source for an unknown
 /// capability — used when the capability isn't in the public
 /// store. The host's handler typically prompts the operator
-/// for a local path (`fai install --link`) or a URL
-/// (`fai install <url>`), then installs and reanalyzes.
+/// for a local path (`chain install --link`) or a URL
+/// (`chain install <url>`), then installs and reanalyzes.
 ///
 /// This is the recovery path for private modules: the public
-/// store doesn't know about `htw.digiscout/onet-lookup`, but
-/// the operator can point the hub at the local clone.
+/// store doesn't know about `acme.internal/directory-lookup`,
+/// but the operator can point the hub at the local clone.
 @immutable
 class AddModuleSourceFix extends QuickFix {
   /// The capability the operator wrote — the host uses it to

lib/src/run_driver.dart

@@ -19,6 +19,19 @@
 
 import 'dart:typed_data';
 
+/// A file chosen by the host's native picker for a flow file input.
+class PickedFileData {
+  final String fileName;
+  final Uint8List bytes;
+  const PickedFileData({required this.fileName, required this.bytes});
+}
+
+/// Host-side native file picker. Returns null when the operator
+/// cancels. When a host does not supply one, the Run tab falls back
+/// to its manual path-entry dialog.
+typedef PickFileCallback = Future<PickedFileData?> Function();
+
+
 abstract class FlowRunDriver {
   /// Trigger a run of [flowName] with the supplied inputs.
   /// Text + file inputs come in separate maps so the host

lib/src/widgets.dart

@@ -12,11 +12,17 @@ class FaiEmptyState extends StatelessWidget {
   final IconData icon;
   final String title;
   final String? hint;
+
+  /// Optional action rendered under the hint (e.g. the empty flow
+  /// list's "import example flows" button).
+  final Widget? action;
+
   const FaiEmptyState({
     super.key,
     required this.icon,
     required this.title,
     this.hint,
+    this.action,
   });
 
   @override
@@ -46,6 +52,10 @@ class FaiEmptyState extends StatelessWidget {
                 textAlign: TextAlign.center,
               ),
             ],
+            if (action != null) ...[
+              const SizedBox(height: FaiSpace.md),
+              action!,
+            ],
           ],
         ),
       ),

lib/src/widgets/missing_modules_badge.dart

@@ -0,0 +1,184 @@
+// Flow-list badge for flows whose steps reference capabilities
+// the hub doesn't provide. Split out of flow_editor_page.dart so
+// the resolvability states (installable from a store vs. not in
+// any store) stay unit-testable.
+
+import 'package:flutter/material.dart';
+
+import '../l10n.dart';
+import '../tokens.dart';
+
+/// Split a flow's missing capabilities into the ones a configured
+/// store can actually install and the ones no store resolves.
+///
+/// [storeNames] is the host-supplied set of bare capability names
+/// the store can install (already filtered to installable entries
+/// — published/alpha, native). An empty set means "nothing is
+/// store-installable" (known state); `null` means the store state
+/// is UNKNOWN (snapshot not loaded / unreachable) — then every
+/// missing cap lands in `unclassified` and the UI claims neither
+/// "installable" nor "not in store".
+({
+  List<String> installable,
+  List<String> notInStore,
+  List<String> unclassified,
+}) splitMissingCaps(
+  List<String> missing,
+  Set<String>? storeNames,
+) {
+  if (storeNames == null) {
+    // Store state unknown (snapshot not loaded / unreachable):
+    // claim neither "installable" nor "not in store".
+    return (
+      installable: const <String>[],
+      notInStore: const <String>[],
+      unclassified: missing,
+    );
+  }
+  final installable = <String>[];
+  final notInStore = <String>[];
+  for (final cap in missing) {
+    final bare = cap.split('@').first;
+    (storeNames.contains(bare) ? installable : notInStore).add(cap);
+  }
+  return (
+    installable: installable,
+    notInStore: notInStore,
+    unclassified: const <String>[],
+  );
+}
+
+/// "N modules missing" status on flows whose steps reference
+/// capabilities the hub doesn't provide. Status and action are
+/// SEPARATE elements (usertest: the combined orange chip made
+/// the whole list read like an error wall and ellipsized the
+/// action word):
+/// - status = quiet neutral chip with a small amber dot — a
+///   note, not an alarm; warning orange stays reserved for real
+///   failures.
+/// - action = its own "Install" link that is never truncated;
+///   both live in the row's Wrap, so tight widths wrap to a
+///   second line instead of cutting text mid-word.
+///
+/// The install action only covers [installable] — capabilities a
+/// configured store resolves. [notInStore] capabilities get their
+/// own quiet chip whose tooltip explains the three recovery paths
+/// (local install / add store / configure integration) BEFORE any
+/// click, instead of an install button that would end in the
+/// hub's "no store entry" error. [unclassified] capabilities
+/// (store state unknown) get the missing chip with neither an
+/// install offer nor a not-in-store claim.
+class MissingModulesBadge extends StatelessWidget {
+  final List<String> installable;
+  final List<String> notInStore;
+  final List<String> unclassified;
+  final FlowEditorStrings strings;
+  final VoidCallback? onInstall;
+  const MissingModulesBadge({
+    super.key,
+    required this.installable,
+    required this.notInStore,
+    required this.strings,
+    required this.onInstall,
+    this.unclassified = const [],
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final children = <Widget>[
+      if (installable.isNotEmpty)
+        _chip(
+          theme,
+          dot: const Color(0xFFEF6C00),
+          label: strings.flowListNeedsModules(installable.length),
+          tooltip: strings.flowListNeedsModulesTooltip(
+            installable.join('\n'),
+          ),
+        ),
+      if (installable.isNotEmpty && onInstall != null)
+        InkWell(
+          onTap: onInstall,
+          borderRadius: BorderRadius.circular(FaiRadius.sm),
+          child: Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
+            child: Text(
+              strings.flowListInstallMissing,
+              style: theme.textTheme.labelSmall?.copyWith(
+                color: theme.colorScheme.primary,
+                fontSize: 10,
+                fontWeight: FontWeight.w600,
+                letterSpacing: 0.2,
+              ),
+            ),
+          ),
+        ),
+      if (unclassified.isNotEmpty)
+        _chip(
+          theme,
+          dot: const Color(0xFFEF6C00),
+          label: strings.flowListNeedsModules(unclassified.length),
+          tooltip: strings.flowListNeedsModulesTooltipNoAction(
+            unclassified.join('\n'),
+          ),
+        ),
+      if (notInStore.isNotEmpty)
+        _chip(
+          theme,
+          // Muted dot: this state has no one-click fix, so it
+          // must not borrow the actionable chip's amber.
+          dot: theme.colorScheme.outline,
+          label: strings.flowListNotInStore(notInStore.length),
+          tooltip: strings.flowListNotInStoreTooltip(notInStore.join('\n')),
+        ),
+    ];
+    if (children.length == 1) return children.single;
+    return Wrap(
+      spacing: FaiSpace.xs,
+      runSpacing: FaiSpace.xs,
+      crossAxisAlignment: WrapCrossAlignment.center,
+      children: children,
+    );
+  }
+
+  Widget _chip(
+    ThemeData theme, {
+    required Color dot,
+    required String label,
+    required String tooltip,
+  }) {
+    final fg = theme.colorScheme.onSurfaceVariant;
+    return Tooltip(
+      message: tooltip,
+      child: Container(
+        padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
+        decoration: BoxDecoration(
+          color: theme.colorScheme.surfaceContainerHighest,
+          borderRadius: BorderRadius.circular(FaiRadius.sm),
+          border: Border.all(
+            color: theme.colorScheme.outlineVariant.withValues(alpha: 0.6),
+          ),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Container(
+              width: 6,
+              height: 6,
+              decoration: BoxDecoration(color: dot, shape: BoxShape.circle),
+            ),
+            const SizedBox(width: 4),
+            Text(
+              label,
+              style: theme.textTheme.labelSmall?.copyWith(
+                color: fg,
+                fontSize: 10,
+                letterSpacing: 0.2,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/src/widgets/run_tab.dart

@@ -36,11 +36,17 @@ class RunTab extends StatefulWidget {
   final FlowEditorController controller;
   final FlowEditorStrings strings;
   final FlowRunDriver? driver;
+
+  /// Host-side native file picker; null keeps the manual
+  /// path-entry fallback dialog.
+  final PickFileCallback? onPickFile;
+
   const RunTab({
     super.key,
     required this.controller,
     required this.strings,
     this.driver,
+    this.onPickFile,
   });
 
   @override
@@ -469,11 +475,21 @@ class _RunTabState extends State<RunTab> {
   }
 
   Future<void> _pickFile(String name) async {
-    // For 0.2.0 the editor relies on the host to inject a
-    // file-picker via callback; minimal version uses
-    // dart:io directly for desktop. Studio uses file_picker;
-    // we fall back to a manual path entry dialog if no host
-    // picker is available.
+    // Host-injected native picker first — typing an absolute path
+    // by hand is a last resort, not an input method.
+    final hostPick = widget.onPickFile;
+    if (hostPick != null) {
+      final picked = await hostPick();
+      if (picked == null || !mounted) return;
+      setState(() {
+        _fileInputs[name] = _FilePick(
+          fileName: picked.fileName,
+          bytes: picked.bytes,
+        );
+      });
+      return;
+    }
+    // Fallback without a host picker: manual path entry.
     final controller = TextEditingController();
     final ctx = context;
     final result = await showDialog<String>(

pubspec.yaml

@@ -1,6 +1,6 @@
 name: chain_studio_flow_editor
 description: Swappable inline YAML editor for F∆I Studio flows.
-version: 0.22.0
+version: 0.26.0
 publish_to: 'none'
 repository: https://git.flemming.ai/fai/studio-flow-editor
 

test/flow_analyzer_test.dart

@@ -135,13 +135,20 @@ steps:
 name: x
 steps:
   - id: c
-    use: htw.private/secret@^0.1
+    use: acme.internal/secret@^0.1
 '''));
       expect(r.issues, hasLength(1));
       final fixes = a.fixesFor(r.issues.first);
       expect(fixes, hasLength(1));
       expect(fixes.first, isA<AddModuleSourceFix>());
-      expect(r.issues.first.message, contains('Not in the store'));
+      // The message must explain all three recovery paths in place:
+      // local install, adding a store, configuring an integration.
+      expect(
+        r.issues.first.message,
+        contains('No configured store can install it'),
+      );
+      expect(r.issues.first.message, contains('chain install --link'));
+      expect(r.issues.first.message, contains('integration'));
     });
 
     test('did-you-mean wins over install/add-source when a near miss exists',

test/flow_list_project_test.dart

@@ -0,0 +1,146 @@
+// Widget-level proof of the flow list's project separation:
+// switching the active workspace filters the list, and a new flow
+// is stamped with the active project's key. Hermetic — the editor
+// gets a temp flows dir injected and never touches ~/.chain.
+
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:chain_studio_flow_editor/chain_studio_flow_editor.dart';
+
+Future<void> _pumpEditor(
+  WidgetTester tester, {
+  required String flowsDir,
+  required String activeProject,
+}) async {
+  // Build + let the real file IO of the listing complete inside
+  // runAsync (the fake-async test zone never drives real IO).
+  await tester.runAsync(() async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: FlowEditorPage(
+          flowsDir: flowsDir,
+          activeProject: activeProject,
+        ),
+      ),
+    );
+    await Future<void>.delayed(const Duration(milliseconds: 100));
+  });
+  await tester.pump();
+  await tester.pump();
+}
+
+void main() {
+  late Directory tmp;
+
+  setUp(() {
+    tmp = Directory.systemTemp.createTempSync('chain_editor_flows_test');
+    File('${tmp.path}/alpha-report.yaml').writeAsStringSync(
+      'name: alpha-report\nproject: client-a\nsteps: []\n',
+    );
+    File('${tmp.path}/plain.yaml').writeAsStringSync(
+      'name: plain\nsteps: []\n',
+    );
+  });
+
+  tearDown(() {
+    tmp.deleteSync(recursive: true);
+  });
+
+  testWidgets('active project filters the flow list', (tester) async {
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      activeProject: 'client-a',
+    );
+    expect(find.text('alpha-report'), findsOneWidget);
+    expect(find.text('plain'), findsNothing);
+  });
+
+  testWidgets('general shows keyless flows only', (tester) async {
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      activeProject: 'general',
+    );
+    expect(find.text('plain'), findsOneWidget);
+    expect(find.text('alpha-report'), findsNothing);
+  });
+
+  testWidgets('all projects shows everything', (tester) async {
+    await _pumpEditor(tester, flowsDir: tmp.path, activeProject: '');
+    expect(find.text('plain'), findsOneWidget);
+    expect(find.text('alpha-report'), findsOneWidget);
+  });
+
+  testWidgets('empty project state names the project and the way out', (
+    tester,
+  ) async {
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      activeProject: 'client-b',
+    );
+    expect(find.textContaining('client-b'), findsOneWidget);
+    expect(find.text('alpha-report'), findsNothing);
+    expect(find.text('plain'), findsNothing);
+  });
+
+  testWidgets('new flow is stamped with the active project key', (
+    tester,
+  ) async {
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      activeProject: 'client-a',
+    );
+    await tester.tap(find.text('New flow'));
+    await tester.pumpAndSettle();
+    await tester.enterText(
+      find.descendant(
+        of: find.byType(AlertDialog),
+        matching: find.byType(TextField),
+      ),
+      'fresh-flow',
+    );
+    await tester.tap(find.text('Create'));
+    await tester.runAsync(() => Future<void>.delayed(
+          const Duration(milliseconds: 50),
+        ));
+    await tester.pumpAndSettle();
+
+    final created = File('${tmp.path}/fresh-flow.yaml');
+    expect(created.existsSync(), isTrue);
+    expect(created.readAsStringSync(), contains('project: client-a'));
+  });
+
+  testWidgets('new flow under general stays unstamped (no key = general)', (
+    tester,
+  ) async {
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      activeProject: 'general',
+    );
+    await tester.tap(find.text('New flow'));
+    await tester.pumpAndSettle();
+    await tester.enterText(
+      find.descendant(
+        of: find.byType(AlertDialog),
+        matching: find.byType(TextField),
+      ),
+      'general-flow',
+    );
+    await tester.tap(find.text('Create'));
+    await tester.runAsync(() => Future<void>.delayed(
+          const Duration(milliseconds: 50),
+        ));
+    await tester.pumpAndSettle();
+
+    final created = File('${tmp.path}/general-flow.yaml');
+    expect(created.existsSync(), isTrue);
+    expect(created.readAsStringSync(), isNot(contains('project:')));
+  });
+}

test/flow_list_samples_test.dart

@@ -0,0 +1,144 @@
+// Widget-level proof of the sample handling contract (persona
+// review 2026-08-27 / sealed-areas rework):
+//
+//   * The host's sample set (the hub's FlowSummary.sample wire
+//     flag) is the ONLY source of the "Example" chip — no host
+//     info, no chips. The editor's old content-marker scan had
+//     silently drifted from the hub's header and is gone.
+//   * Sample flows collapse under one "Examples (N)" group so
+//     they are never mistaken for the operator's own work; the
+//     group expands only on demand (or when nothing else exists).
+//   * An empty list offers "Import example flows" iff the host
+//     wired the action (sealed areas start empty on purpose).
+//
+// Hermetic — temp flows dir, never ~/.chain.
+
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:chain_studio_flow_editor/chain_studio_flow_editor.dart';
+
+Future<void> _pumpEditor(
+  WidgetTester tester, {
+  required String flowsDir,
+  Set<String>? sampleFlowNames,
+  Future<void> Function()? onImportSamples,
+}) async {
+  await tester.runAsync(() async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: FlowEditorPage(
+          flowsDir: flowsDir,
+          sampleFlowNames: sampleFlowNames,
+          onImportSamples: onImportSamples,
+        ),
+      ),
+    );
+    await Future<void>.delayed(const Duration(milliseconds: 100));
+  });
+  await tester.pump();
+  await tester.pump();
+}
+
+void main() {
+  late Directory tmp;
+
+  setUp(() {
+    tmp = Directory.systemTemp.createTempSync('chain_editor_samples_test');
+    File('${tmp.path}/my-work.yaml').writeAsStringSync(
+      'name: my-work\nsteps: []\n',
+    );
+    File('${tmp.path}/hello.yaml').writeAsStringSync(
+      'name: hello\nsteps: []\n',
+    );
+  });
+
+  tearDown(() {
+    tmp.deleteSync(recursive: true);
+  });
+
+  testWidgets('host-reported samples collapse under the examples group', (
+    tester,
+  ) async {
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      sampleFlowNames: const {'hello'},
+    );
+    // Own flow visible, sample hidden behind the collapsed group.
+    expect(find.text('my-work'), findsOneWidget);
+    expect(find.text('hello'), findsNothing);
+    expect(find.text('Examples (1)'), findsOneWidget);
+
+    await tester.tap(find.text('Examples (1)'));
+    await tester.pump();
+    expect(find.text('hello'), findsOneWidget);
+    // The revealed sample row carries the chip.
+    expect(find.text('Example'), findsOneWidget);
+  });
+
+  testWidgets('no host sample info means no chips and no group', (
+    tester,
+  ) async {
+    await _pumpEditor(tester, flowsDir: tmp.path, sampleFlowNames: null);
+    expect(find.text('my-work'), findsOneWidget);
+    expect(find.text('hello'), findsOneWidget);
+    expect(find.text('Example'), findsNothing);
+    expect(find.textContaining('Examples ('), findsNothing);
+  });
+
+  testWidgets('a samples-only list starts expanded', (tester) async {
+    File('${tmp.path}/my-work.yaml').deleteSync();
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      sampleFlowNames: const {'hello'},
+    );
+    expect(find.text('hello'), findsOneWidget);
+    expect(find.text('Examples (1)'), findsOneWidget);
+  });
+
+  testWidgets('the empty list offers the import action when wired', (
+    tester,
+  ) async {
+    File('${tmp.path}/my-work.yaml').deleteSync();
+    File('${tmp.path}/hello.yaml').deleteSync();
+    var imported = 0;
+    await _pumpEditor(
+      tester,
+      flowsDir: tmp.path,
+      onImportSamples: () async {
+        imported++;
+        File('${tmp.path}/hello.yaml').writeAsStringSync(
+          'name: hello\nsteps: []\n',
+        );
+      },
+    );
+    final button = find.text('Import example flows');
+    expect(button, findsOneWidget);
+    await tester.runAsync(() async {
+      await tester.tap(button);
+      // Let the import callback, the directory re-list (real IO)
+      // and the FutureBuilder's completion callback all run.
+      await Future<void>.delayed(const Duration(milliseconds: 200));
+      await tester.pump();
+      await Future<void>.delayed(const Duration(milliseconds: 100));
+    });
+    await tester.pump();
+    await tester.pump();
+    expect(imported, 1);
+    // The imported flow appears without a manual refresh.
+    expect(find.text('hello'), findsOneWidget);
+  });
+
+  testWidgets('the empty list stays action-free when nothing is wired', (
+    tester,
+  ) async {
+    File('${tmp.path}/my-work.yaml').deleteSync();
+    File('${tmp.path}/hello.yaml').deleteSync();
+    await _pumpEditor(tester, flowsDir: tmp.path);
+    expect(find.text('Import example flows'), findsNothing);
+  });
+}

test/flow_project_test.dart

@@ -34,6 +34,30 @@ void main() {
     });
   });
 
+  group('project filter semantics', () {
+    test('no project key counts as general (display only)', () {
+      expect(effectiveFlowProject(''), 'general');
+      expect(effectiveFlowProject('client-a'), 'client-a');
+    });
+
+    test('empty active workspace shows every flow', () {
+      expect(flowVisibleInProject('', ''), isTrue);
+      expect(flowVisibleInProject('client-a', ''), isTrue);
+    });
+
+    test('general shows keyless flows and explicit general ones', () {
+      expect(flowVisibleInProject('', 'general'), isTrue);
+      expect(flowVisibleInProject('general', 'general'), isTrue);
+      expect(flowVisibleInProject('client-a', 'general'), isFalse);
+    });
+
+    test('a project shows only its own flows', () {
+      expect(flowVisibleInProject('client-a', 'client-a'), isTrue);
+      expect(flowVisibleInProject('', 'client-a'), isFalse);
+      expect(flowVisibleInProject('client-b', 'client-a'), isFalse);
+    });
+  });
+
   group('normalizeProjectSlug', () {
     test('collapses separators and trims trailing dashes', () {
       expect(normalizeProjectSlug('Projekt  Alpha__'), 'projekt-alpha');

test/missing_modules_badge_test.dart

@@ -0,0 +1,134 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:chain_studio_flow_editor/src/l10n.dart';
+import 'package:chain_studio_flow_editor/src/widgets/missing_modules_badge.dart';
+
+void main() {
+  group('splitMissingCaps', () {
+    test('separates store-resolvable from not-in-store capabilities', () {
+      final split = splitMissingCaps(
+        ['text.extract', 'example-provider/tool.summarize'],
+        {'text.extract', 'debug.echo'},
+      );
+      expect(split.installable, ['text.extract']);
+      expect(split.notInStore, ['example-provider/tool.summarize']);
+    });
+
+    test('matches on the bare name when the flow pins a version', () {
+      final split = splitMissingCaps(['text.extract@^0'], {'text.extract'});
+      expect(split.installable, ['text.extract@^0']);
+      expect(split.notInStore, isEmpty);
+    });
+
+    test('empty store set classifies everything as not-in-store', () {
+      final split = splitMissingCaps(['text.extract'], {});
+      expect(split.installable, isEmpty);
+      expect(split.notInStore, ['text.extract']);
+      expect(split.unclassified, isEmpty);
+    });
+
+    test('null store set (state unknown) classifies nothing', () {
+      final split = splitMissingCaps(['text.extract'], null);
+      expect(split.installable, isEmpty);
+      expect(split.notInStore, isEmpty);
+      expect(split.unclassified, ['text.extract']);
+    });
+  });
+
+  Future<void> pumpBadge(
+    WidgetTester tester, {
+    required List<String> installable,
+    required List<String> notInStore,
+    VoidCallback? onInstall,
+  }) {
+    return tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: MissingModulesBadge(
+            installable: installable,
+            notInStore: notInStore,
+            strings: const FlowEditorStrings(FlowEditorLocale.en),
+            onInstall: onInstall,
+          ),
+        ),
+      ),
+    );
+  }
+
+  group('MissingModulesBadge', () {
+    testWidgets('store-resolvable capability offers the install action', (
+      tester,
+    ) async {
+      var installed = false;
+      await pumpBadge(
+        tester,
+        installable: ['text.extract'],
+        notInStore: [],
+        onInstall: () => installed = true,
+      );
+      expect(find.text('1 module missing'), findsOneWidget);
+      expect(find.text('Install'), findsOneWidget);
+      expect(find.textContaining('not in store'), findsNothing);
+      await tester.tap(find.text('Install'));
+      expect(installed, isTrue);
+    });
+
+    testWidgets(
+      'not-in-store capability shows the classified state, no install',
+      (tester) async {
+        await pumpBadge(
+          tester,
+          installable: [],
+          notInStore: ['example-provider/tool.summarize'],
+          onInstall: () => fail('no install action for not-in-store caps'),
+        );
+        expect(find.text('not in store'), findsOneWidget);
+        expect(find.text('Install'), findsNothing);
+        // The recovery paths are explained in place, before any click.
+        final tooltip = tester.widget<Tooltip>(find.byType(Tooltip));
+        expect(tooltip.message, contains('example-provider/tool.summarize'));
+        expect(tooltip.message, contains('chain install --link'));
+        expect(tooltip.message, contains('Settings → Stores'));
+        expect(tooltip.message, contains('integration'));
+      },
+    );
+
+    testWidgets('unknown store state offers neither install nor claims', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        MaterialApp(
+          home: Scaffold(
+            body: MissingModulesBadge(
+              installable: const [],
+              notInStore: const [],
+              unclassified: const ['text.extract'],
+              strings: const FlowEditorStrings(FlowEditorLocale.en),
+              onInstall: () => fail('no install offer while store unknown'),
+            ),
+          ),
+        ),
+      );
+      expect(find.text('1 module missing'), findsOneWidget);
+      expect(find.text('Install'), findsNothing);
+      expect(find.textContaining('not in store'), findsNothing);
+      final tooltip = tester.widget<Tooltip>(find.byType(Tooltip));
+      expect(tooltip.message, contains('store is not reachable'));
+    });
+
+    testWidgets('mixed state renders both chips, install covers store caps', (
+      tester,
+    ) async {
+      await pumpBadge(
+        tester,
+        installable: ['text.extract'],
+        notInStore: ['example-provider/tool.summarize'],
+        onInstall: () {},
+      );
+      expect(find.text('1 module missing'), findsOneWidget);
+      expect(find.text('Install'), findsOneWidget);
+      expect(find.text('not in store'), findsOneWidget);
+    });
+  });
+}