feat(studio): Flows + Module sheet + System-AI editor i18n (v0.28.0)

- Localize Flows page: app-bar title and reload tooltip,
  hub-unreachable / no-saved-flows empty states, run-flow input
  dialog (title with flow name, description, hint, Cancel /
  Run), running dialog (title, "Flow running…" status, no-output
  message, Close button), flow-card Run button.
- Localize the module-sheet bottom sheet: failed-to-load text,
  Capabilities and "Declared permissions" section headers,
  no-permissions placeholder copy.
- Localize the System-AI configuration dialog: title, intro
  paragraph, provider dropdown label, endpoint label, API-key
  env-var label (required vs optional) and disclaimer, privacy
  mode header and three options (Off / Redacted / Full) plus
  their descriptions, test-result panel ("Connection ok" /
  "Connection failed", "Reply: …" prefix), model picker (label,
  hint fallback, helper text with Ollama variant, Refresh /
  Pull / Pulling… buttons, list errors and empty states),
  hardware banner ("Detected: …" + " · curation reviewed …"
  suffix), suitability legend (recommended / balanced / small /
  large / huge / unknown), cache row with pluralized count and
  Clear button, cache cleared / clear-failed toasts, pull-empty
  / pull-failed errors. Suitability label moved off a getter
  onto a `labelFor(BuildContext)` method so it can read the
  current locale.

Provider preset descriptions and modelHint strings stay in
English in `_ProviderPreset.all` — they're tightly coupled to
the wire-protocol identifiers and would require a runtime
factory rebuild rather than a const list.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_de.arb

@@ -263,6 +263,25 @@
   "modulesUninstallFailed": "Deinstallation fehlgeschlagen: {error}",
   "@modulesUninstallFailed": { "placeholders": { "error": { "type": "String" } } },
   "modulesUninstalling": "Wird deinstalliert…",
+  "moduleSheetFailedToLoad": "Laden fehlgeschlagen: {error}",
+  "@moduleSheetFailedToLoad": { "placeholders": { "error": { "type": "String" } } },
+  "moduleSheetCapabilities": "Capabilities",
+  "moduleSheetPermissions": "Deklarierte Berechtigungen",
+  "moduleSheetNoPermissions": "(keine — reines Berechnungsmodul)",
+
+  "flowsTitle": "Flows",
+  "flowsReloadTooltip": "Aktualisieren",
+  "flowsNoneTitle": "Keine gespeicherten Flows",
+  "flowsNoneHint": "Flow speichern mit `fai admin flows save <name> <flow.yaml>`, dann taucht er hier auf.",
+  "flowsRunDialogTitle": "{name} ausführen",
+  "@flowsRunDialogTitle": { "placeholders": { "name": { "type": "String" } } },
+  "flowsRunDialogBody": "Eingaben als key=value, eine pro Zeile. Alle Werte werden als Text-Payloads gesendet. Für binäre Eingaben die `fai run` CLI nutzen.",
+  "flowsInputsHint": "name=World\ntarget_language=English\nsummary_style=three bullet points",
+  "flowsRunButton": "Starten",
+  "flowsRunningTitle": "{name} läuft",
+  "@flowsRunningTitle": { "placeholders": { "name": { "type": "String" } } },
+  "flowsRunning": "Flow läuft…",
+  "flowsNoOutputs": "Flow abgeschlossen ohne deklarierte Outputs.",
 
   "approvalsTitle": "Freigaben",
   "approvalsTabPending": "Offen",
@@ -411,5 +430,65 @@
   "@searchStoreHintWithTagline": { "placeholders": { "tagline": { "type": "String" } } },
   "searchStoreHintWithCategory": "Store · {category}",
   "@searchStoreHintWithCategory": { "placeholders": { "category": { "type": "String" } } },
-  "searchSavedFlowHint": "gespeicherter Flow"
+  "searchSavedFlowHint": "gespeicherter Flow",
+
+  "systemAiTitle": "System-AI",
+  "systemAiIntro": "Die hub-interne LLM, die die Plattform selbst für Fehlererklärungen und Operator-Hilfe nutzt. Standardmäßig aus; hier konfigurieren. Siehe docs/architecture/system-ai.md, was über die Leitung geht.",
+  "systemAiProviderLabel": "Provider",
+  "systemAiEndpointLabel": "Endpunkt-URL (bis /v1)",
+  "systemAiApiKeyRequired": "API-Key-Umgebungsvariable (erforderlich)",
+  "systemAiApiKeyOptional": "API-Key-Umgebungsvariable (optional)",
+  "systemAiApiKeyDisclaimer": "Studio liest oder speichert den Key-Wert nie — nur den Namen der Umgebungsvariable. Der Hub liest `${name}` zur Anfragezeit.",
+  "@systemAiApiKeyDisclaimer": { "placeholders": { "name": { "type": "String" } } },
+  "systemAiTestConnection": "Verbindung testen",
+  "systemAiTesting": "Teste…",
+  "systemAiSave": "Speichern",
+  "systemAiPrivacyHeader": "PRIVACY-MODUS",
+  "systemAiPrivacyOffLabel": "Aus",
+  "systemAiPrivacyOffDesc": "Feature deaktiviert. Keine Anfragen verlassen den Hub.",
+  "systemAiPrivacyRedactedLabel": "Redigiert",
+  "systemAiPrivacyRedactedDesc": "Nur event_type / error / Modul-Namen. KRITIS-freundlicher Standard.",
+  "systemAiPrivacyFullLabel": "Voll",
+  "systemAiPrivacyFullDesc": "Enthält das Audit-Detail-JSON (nur Hash — keine Roh-Payloads).",
+  "systemAiConnectionOk": "Verbindung ok",
+  "systemAiConnectionFailed": "Verbindung fehlgeschlagen",
+  "systemAiReplyPrefix": "Antwort: {text}",
+  "@systemAiReplyPrefix": { "placeholders": { "text": { "type": "String" } } },
+  "systemAiModelLabel": "Modell (erforderlich)",
+  "systemAiModelHintFallback": "Modell-Identifier, den der Provider erwartet",
+  "systemAiModelHelperBase": "Erforderlich: aus der Liste auswählen (Aktualisieren) oder eintippen.",
+  "systemAiModelHelperOllama": "Erforderlich: aus der Liste auswählen (Aktualisieren) oder eintippen. Mit Pull von Ollama herunterladen.",
+  "systemAiRefresh": "Aktualisieren",
+  "systemAiPull": "Pull",
+  "systemAiPulling": "Lade…",
+  "systemAiCouldNotListModels": "Modelle konnten nicht aufgelistet werden: {error}",
+  "@systemAiCouldNotListModels": { "placeholders": { "error": { "type": "String" } } },
+  "systemAiNoModelsOllama": "Noch keine Modelle auf dem Ollama-Server. Oben eintippen und Pull klicken.",
+  "systemAiNoModelsGeneric": "Provider lieferte keine Modelle.",
+  "systemAiSuitabilityRecommended": "empfohlen",
+  "systemAiSuitabilityBalanced": "ausgewogen",
+  "systemAiSuitabilitySmall": "klein — Qualität evtl. eingeschränkt",
+  "systemAiSuitabilityLarge": "groß — langsamer",
+  "systemAiSuitabilityHuge": "sehr groß — auf einem Laptop wahrscheinlich zu langsam",
+  "systemAiSuitabilityUnknown": "Größe unbekannt",
+  "systemAiHwDetected": "Erkannt: {summary}",
+  "@systemAiHwDetected": { "placeholders": { "summary": { "type": "String" } } },
+  "systemAiHwReviewed": " · Kuratierung geprüft {date}",
+  "@systemAiHwReviewed": { "placeholders": { "date": { "type": "String" } } },
+  "systemAiLegendRecommended": "empfohlen für diese Hardware{tier}",
+  "@systemAiLegendRecommended": { "placeholders": { "tier": { "type": "String" } } },
+  "systemAiLegendBalanced": "ausgewogen (4-8B)",
+  "systemAiLegendSmallLarge": "klein <3B / groß 9-15B / über Hardware",
+  "systemAiLegendHuge": "sehr groß >15B",
+  "systemAiLegendUnknown": "Größe unbekannt",
+  "systemAiCacheRow": "Cache: {n} {n, plural, =1{gespeicherte Erklärung} other{gespeicherte Erklärungen}}. Identische Prompts treffen den Cache; Modell- oder Privacy-Modus-Wechsel leeren ihn automatisch.",
+  "@systemAiCacheRow": { "placeholders": { "n": { "type": "int" } } },
+  "systemAiCacheClear": "Leeren",
+  "systemAiCacheClearedToast": "{n} gespeicherte System-AI-Erklärungen gelöscht.",
+  "@systemAiCacheClearedToast": { "placeholders": { "n": { "type": "int" } } },
+  "systemAiCacheClearFailed": "Cache-Löschen fehlgeschlagen: {error}",
+  "@systemAiCacheClearFailed": { "placeholders": { "error": { "type": "String" } } },
+  "systemAiPullEmptyError": "Erst eine Modell-ID eintippen (z.B. gemma3:4b).",
+  "systemAiPullFailedError": "Pull fehlgeschlagen: {error}",
+  "@systemAiPullFailedError": { "placeholders": { "error": { "type": "String" } } }
 }

lib/l10n/app_en.arb

@@ -264,6 +264,25 @@
   "modulesUninstallFailed": "Uninstall failed: {error}",
   "@modulesUninstallFailed": { "placeholders": { "error": { "type": "String" } } },
   "modulesUninstalling": "Uninstalling…",
+  "moduleSheetFailedToLoad": "Failed to load: {error}",
+  "@moduleSheetFailedToLoad": { "placeholders": { "error": { "type": "String" } } },
+  "moduleSheetCapabilities": "Capabilities",
+  "moduleSheetPermissions": "Declared permissions",
+  "moduleSheetNoPermissions": "(none — pure-computation module)",
+
+  "flowsTitle": "Flows",
+  "flowsReloadTooltip": "Reload",
+  "flowsNoneTitle": "No saved flows",
+  "flowsNoneHint": "Save a flow with `fai admin flows save <name> <flow.yaml>` and it shows up here.",
+  "flowsRunDialogTitle": "Run {name}",
+  "@flowsRunDialogTitle": { "placeholders": { "name": { "type": "String" } } },
+  "flowsRunDialogBody": "Inputs as key=value, one per line. All values are sent as text payloads. For binary inputs use the `fai run` CLI.",
+  "flowsInputsHint": "name=World\ntarget_language=English\nsummary_style=three bullet points",
+  "flowsRunButton": "Run",
+  "flowsRunningTitle": "Running {name}",
+  "@flowsRunningTitle": { "placeholders": { "name": { "type": "String" } } },
+  "flowsRunning": "Flow running…",
+  "flowsNoOutputs": "Flow completed with no declared outputs.",
 
   "approvalsTitle": "Approvals",
   "approvalsTabPending": "Pending",
@@ -412,5 +431,65 @@
   "@searchStoreHintWithTagline": { "placeholders": { "tagline": { "type": "String" } } },
   "searchStoreHintWithCategory": "store · {category}",
   "@searchStoreHintWithCategory": { "placeholders": { "category": { "type": "String" } } },
-  "searchSavedFlowHint": "saved flow"
+  "searchSavedFlowHint": "saved flow",
+
+  "systemAiTitle": "System AI",
+  "systemAiIntro": "The hub-internal LLM the platform itself uses for inline failure explanations and operator help. Off by default; configure here. See docs/architecture/system-ai.md for what crosses the wire.",
+  "systemAiProviderLabel": "Provider",
+  "systemAiEndpointLabel": "Endpoint URL (up to /v1)",
+  "systemAiApiKeyRequired": "API key env var (required)",
+  "systemAiApiKeyOptional": "API key env var (optional)",
+  "systemAiApiKeyDisclaimer": "Studio never reads or stores the key value — only its env-var name. The hub reads `${name}` at request time.",
+  "@systemAiApiKeyDisclaimer": { "placeholders": { "name": { "type": "String" } } },
+  "systemAiTestConnection": "Test connection",
+  "systemAiTesting": "Testing…",
+  "systemAiSave": "Save",
+  "systemAiPrivacyHeader": "PRIVACY MODE",
+  "systemAiPrivacyOffLabel": "Off",
+  "systemAiPrivacyOffDesc": "Feature disabled. No requests leave the hub.",
+  "systemAiPrivacyRedactedLabel": "Redacted",
+  "systemAiPrivacyRedactedDesc": "Only event_type / error / module names. KRITIS-friendly default.",
+  "systemAiPrivacyFullLabel": "Full",
+  "systemAiPrivacyFullDesc": "Includes the audit detail JSON (hash-only — no raw payloads).",
+  "systemAiConnectionOk": "Connection ok",
+  "systemAiConnectionFailed": "Connection failed",
+  "systemAiReplyPrefix": "Reply: {text}",
+  "@systemAiReplyPrefix": { "placeholders": { "text": { "type": "String" } } },
+  "systemAiModelLabel": "Model (required)",
+  "systemAiModelHintFallback": "model identifier the provider expects",
+  "systemAiModelHelperBase": "Required: pick from the list (Refresh) or type one.",
+  "systemAiModelHelperOllama": "Required: pick from the list (Refresh) or type one. Use Pull to download from Ollama.",
+  "systemAiRefresh": "Refresh",
+  "systemAiPull": "Pull",
+  "systemAiPulling": "Pulling…",
+  "systemAiCouldNotListModels": "Could not list models: {error}",
+  "@systemAiCouldNotListModels": { "placeholders": { "error": { "type": "String" } } },
+  "systemAiNoModelsOllama": "No models on the Ollama server yet. Type one above and click Pull.",
+  "systemAiNoModelsGeneric": "Provider returned no models.",
+  "systemAiSuitabilityRecommended": "recommended",
+  "systemAiSuitabilityBalanced": "balanced",
+  "systemAiSuitabilitySmall": "small — quality may be limited",
+  "systemAiSuitabilityLarge": "large — slower",
+  "systemAiSuitabilityHuge": "huge — likely too slow on a laptop",
+  "systemAiSuitabilityUnknown": "size unknown",
+  "systemAiHwDetected": "Detected: {summary}",
+  "@systemAiHwDetected": { "placeholders": { "summary": { "type": "String" } } },
+  "systemAiHwReviewed": " · curation reviewed {date}",
+  "@systemAiHwReviewed": { "placeholders": { "date": { "type": "String" } } },
+  "systemAiLegendRecommended": "recommended for this hardware{tier}",
+  "@systemAiLegendRecommended": { "placeholders": { "tier": { "type": "String" } } },
+  "systemAiLegendBalanced": "balanced (4-8B)",
+  "systemAiLegendSmallLarge": "small <3B / large 9-15B / above hardware",
+  "systemAiLegendHuge": "huge >15B",
+  "systemAiLegendUnknown": "size unknown",
+  "systemAiCacheRow": "Cache: {n} cached {n, plural, =1{explanation} other{explanations}}. Identical prompts hit the cache; switching model or privacy mode flushes automatically.",
+  "@systemAiCacheRow": { "placeholders": { "n": { "type": "int" } } },
+  "systemAiCacheClear": "Clear",
+  "systemAiCacheClearedToast": "Cleared {n} cached System-AI explanations.",
+  "@systemAiCacheClearedToast": { "placeholders": { "n": { "type": "int" } } },
+  "systemAiCacheClearFailed": "Cache clear failed: {error}",
+  "@systemAiCacheClearFailed": { "placeholders": { "error": { "type": "String" } } },
+  "systemAiPullEmptyError": "Type a model id (e.g. gemma3:4b) first.",
+  "systemAiPullFailedError": "Pull failed: {error}",
+  "@systemAiPullFailedError": { "placeholders": { "error": { "type": "String" } } }
 }

lib/l10n/app_localizations.dart

@@ -1196,6 +1196,96 @@ abstract class AppLocalizations {
   /// **'Uninstalling…'**
   String get modulesUninstalling;
 
+  /// No description provided for @moduleSheetFailedToLoad.
+  ///
+  /// In en, this message translates to:
+  /// **'Failed to load: {error}'**
+  String moduleSheetFailedToLoad(String error);
+
+  /// No description provided for @moduleSheetCapabilities.
+  ///
+  /// In en, this message translates to:
+  /// **'Capabilities'**
+  String get moduleSheetCapabilities;
+
+  /// No description provided for @moduleSheetPermissions.
+  ///
+  /// In en, this message translates to:
+  /// **'Declared permissions'**
+  String get moduleSheetPermissions;
+
+  /// No description provided for @moduleSheetNoPermissions.
+  ///
+  /// In en, this message translates to:
+  /// **'(none — pure-computation module)'**
+  String get moduleSheetNoPermissions;
+
+  /// No description provided for @flowsTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Flows'**
+  String get flowsTitle;
+
+  /// No description provided for @flowsReloadTooltip.
+  ///
+  /// In en, this message translates to:
+  /// **'Reload'**
+  String get flowsReloadTooltip;
+
+  /// No description provided for @flowsNoneTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'No saved flows'**
+  String get flowsNoneTitle;
+
+  /// No description provided for @flowsNoneHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Save a flow with `fai admin flows save <name> <flow.yaml>` and it shows up here.'**
+  String get flowsNoneHint;
+
+  /// No description provided for @flowsRunDialogTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Run {name}'**
+  String flowsRunDialogTitle(String name);
+
+  /// No description provided for @flowsRunDialogBody.
+  ///
+  /// In en, this message translates to:
+  /// **'Inputs as key=value, one per line. All values are sent as text payloads. For binary inputs use the `fai run` CLI.'**
+  String get flowsRunDialogBody;
+
+  /// No description provided for @flowsInputsHint.
+  ///
+  /// In en, this message translates to:
+  /// **'name=World\ntarget_language=English\nsummary_style=three bullet points'**
+  String get flowsInputsHint;
+
+  /// No description provided for @flowsRunButton.
+  ///
+  /// In en, this message translates to:
+  /// **'Run'**
+  String get flowsRunButton;
+
+  /// No description provided for @flowsRunningTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Running {name}'**
+  String flowsRunningTitle(String name);
+
+  /// No description provided for @flowsRunning.
+  ///
+  /// In en, this message translates to:
+  /// **'Flow running…'**
+  String get flowsRunning;
+
+  /// No description provided for @flowsNoOutputs.
+  ///
+  /// In en, this message translates to:
+  /// **'Flow completed with no declared outputs.'**
+  String get flowsNoOutputs;
+
   /// No description provided for @approvalsTitle.
   ///
   /// In en, this message translates to:
@@ -1783,6 +1873,300 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'saved flow'**
   String get searchSavedFlowHint;
+
+  /// No description provided for @systemAiTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'System AI'**
+  String get systemAiTitle;
+
+  /// No description provided for @systemAiIntro.
+  ///
+  /// In en, this message translates to:
+  /// **'The hub-internal LLM the platform itself uses for inline failure explanations and operator help. Off by default; configure here. See docs/architecture/system-ai.md for what crosses the wire.'**
+  String get systemAiIntro;
+
+  /// No description provided for @systemAiProviderLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Provider'**
+  String get systemAiProviderLabel;
+
+  /// No description provided for @systemAiEndpointLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Endpoint URL (up to /v1)'**
+  String get systemAiEndpointLabel;
+
+  /// No description provided for @systemAiApiKeyRequired.
+  ///
+  /// In en, this message translates to:
+  /// **'API key env var (required)'**
+  String get systemAiApiKeyRequired;
+
+  /// No description provided for @systemAiApiKeyOptional.
+  ///
+  /// In en, this message translates to:
+  /// **'API key env var (optional)'**
+  String get systemAiApiKeyOptional;
+
+  /// No description provided for @systemAiApiKeyDisclaimer.
+  ///
+  /// In en, this message translates to:
+  /// **'Studio never reads or stores the key value — only its env-var name. The hub reads `\${name}` at request time.'**
+  String systemAiApiKeyDisclaimer(String name);
+
+  /// No description provided for @systemAiTestConnection.
+  ///
+  /// In en, this message translates to:
+  /// **'Test connection'**
+  String get systemAiTestConnection;
+
+  /// No description provided for @systemAiTesting.
+  ///
+  /// In en, this message translates to:
+  /// **'Testing…'**
+  String get systemAiTesting;
+
+  /// No description provided for @systemAiSave.
+  ///
+  /// In en, this message translates to:
+  /// **'Save'**
+  String get systemAiSave;
+
+  /// No description provided for @systemAiPrivacyHeader.
+  ///
+  /// In en, this message translates to:
+  /// **'PRIVACY MODE'**
+  String get systemAiPrivacyHeader;
+
+  /// No description provided for @systemAiPrivacyOffLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Off'**
+  String get systemAiPrivacyOffLabel;
+
+  /// No description provided for @systemAiPrivacyOffDesc.
+  ///
+  /// In en, this message translates to:
+  /// **'Feature disabled. No requests leave the hub.'**
+  String get systemAiPrivacyOffDesc;
+
+  /// No description provided for @systemAiPrivacyRedactedLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Redacted'**
+  String get systemAiPrivacyRedactedLabel;
+
+  /// No description provided for @systemAiPrivacyRedactedDesc.
+  ///
+  /// In en, this message translates to:
+  /// **'Only event_type / error / module names. KRITIS-friendly default.'**
+  String get systemAiPrivacyRedactedDesc;
+
+  /// No description provided for @systemAiPrivacyFullLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Full'**
+  String get systemAiPrivacyFullLabel;
+
+  /// No description provided for @systemAiPrivacyFullDesc.
+  ///
+  /// In en, this message translates to:
+  /// **'Includes the audit detail JSON (hash-only — no raw payloads).'**
+  String get systemAiPrivacyFullDesc;
+
+  /// No description provided for @systemAiConnectionOk.
+  ///
+  /// In en, this message translates to:
+  /// **'Connection ok'**
+  String get systemAiConnectionOk;
+
+  /// No description provided for @systemAiConnectionFailed.
+  ///
+  /// In en, this message translates to:
+  /// **'Connection failed'**
+  String get systemAiConnectionFailed;
+
+  /// No description provided for @systemAiReplyPrefix.
+  ///
+  /// In en, this message translates to:
+  /// **'Reply: {text}'**
+  String systemAiReplyPrefix(String text);
+
+  /// No description provided for @systemAiModelLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Model (required)'**
+  String get systemAiModelLabel;
+
+  /// No description provided for @systemAiModelHintFallback.
+  ///
+  /// In en, this message translates to:
+  /// **'model identifier the provider expects'**
+  String get systemAiModelHintFallback;
+
+  /// No description provided for @systemAiModelHelperBase.
+  ///
+  /// In en, this message translates to:
+  /// **'Required: pick from the list (Refresh) or type one.'**
+  String get systemAiModelHelperBase;
+
+  /// No description provided for @systemAiModelHelperOllama.
+  ///
+  /// In en, this message translates to:
+  /// **'Required: pick from the list (Refresh) or type one. Use Pull to download from Ollama.'**
+  String get systemAiModelHelperOllama;
+
+  /// No description provided for @systemAiRefresh.
+  ///
+  /// In en, this message translates to:
+  /// **'Refresh'**
+  String get systemAiRefresh;
+
+  /// No description provided for @systemAiPull.
+  ///
+  /// In en, this message translates to:
+  /// **'Pull'**
+  String get systemAiPull;
+
+  /// No description provided for @systemAiPulling.
+  ///
+  /// In en, this message translates to:
+  /// **'Pulling…'**
+  String get systemAiPulling;
+
+  /// No description provided for @systemAiCouldNotListModels.
+  ///
+  /// In en, this message translates to:
+  /// **'Could not list models: {error}'**
+  String systemAiCouldNotListModels(String error);
+
+  /// No description provided for @systemAiNoModelsOllama.
+  ///
+  /// In en, this message translates to:
+  /// **'No models on the Ollama server yet. Type one above and click Pull.'**
+  String get systemAiNoModelsOllama;
+
+  /// No description provided for @systemAiNoModelsGeneric.
+  ///
+  /// In en, this message translates to:
+  /// **'Provider returned no models.'**
+  String get systemAiNoModelsGeneric;
+
+  /// No description provided for @systemAiSuitabilityRecommended.
+  ///
+  /// In en, this message translates to:
+  /// **'recommended'**
+  String get systemAiSuitabilityRecommended;
+
+  /// No description provided for @systemAiSuitabilityBalanced.
+  ///
+  /// In en, this message translates to:
+  /// **'balanced'**
+  String get systemAiSuitabilityBalanced;
+
+  /// No description provided for @systemAiSuitabilitySmall.
+  ///
+  /// In en, this message translates to:
+  /// **'small — quality may be limited'**
+  String get systemAiSuitabilitySmall;
+
+  /// No description provided for @systemAiSuitabilityLarge.
+  ///
+  /// In en, this message translates to:
+  /// **'large — slower'**
+  String get systemAiSuitabilityLarge;
+
+  /// No description provided for @systemAiSuitabilityHuge.
+  ///
+  /// In en, this message translates to:
+  /// **'huge — likely too slow on a laptop'**
+  String get systemAiSuitabilityHuge;
+
+  /// No description provided for @systemAiSuitabilityUnknown.
+  ///
+  /// In en, this message translates to:
+  /// **'size unknown'**
+  String get systemAiSuitabilityUnknown;
+
+  /// No description provided for @systemAiHwDetected.
+  ///
+  /// In en, this message translates to:
+  /// **'Detected: {summary}'**
+  String systemAiHwDetected(String summary);
+
+  /// No description provided for @systemAiHwReviewed.
+  ///
+  /// In en, this message translates to:
+  /// **' · curation reviewed {date}'**
+  String systemAiHwReviewed(String date);
+
+  /// No description provided for @systemAiLegendRecommended.
+  ///
+  /// In en, this message translates to:
+  /// **'recommended for this hardware{tier}'**
+  String systemAiLegendRecommended(String tier);
+
+  /// No description provided for @systemAiLegendBalanced.
+  ///
+  /// In en, this message translates to:
+  /// **'balanced (4-8B)'**
+  String get systemAiLegendBalanced;
+
+  /// No description provided for @systemAiLegendSmallLarge.
+  ///
+  /// In en, this message translates to:
+  /// **'small <3B / large 9-15B / above hardware'**
+  String get systemAiLegendSmallLarge;
+
+  /// No description provided for @systemAiLegendHuge.
+  ///
+  /// In en, this message translates to:
+  /// **'huge >15B'**
+  String get systemAiLegendHuge;
+
+  /// No description provided for @systemAiLegendUnknown.
+  ///
+  /// In en, this message translates to:
+  /// **'size unknown'**
+  String get systemAiLegendUnknown;
+
+  /// No description provided for @systemAiCacheRow.
+  ///
+  /// In en, this message translates to:
+  /// **'Cache: {n} cached {n, plural, =1{explanation} other{explanations}}. Identical prompts hit the cache; switching model or privacy mode flushes automatically.'**
+  String systemAiCacheRow(int n);
+
+  /// No description provided for @systemAiCacheClear.
+  ///
+  /// In en, this message translates to:
+  /// **'Clear'**
+  String get systemAiCacheClear;
+
+  /// No description provided for @systemAiCacheClearedToast.
+  ///
+  /// In en, this message translates to:
+  /// **'Cleared {n} cached System-AI explanations.'**
+  String systemAiCacheClearedToast(int n);
+
+  /// No description provided for @systemAiCacheClearFailed.
+  ///
+  /// In en, this message translates to:
+  /// **'Cache clear failed: {error}'**
+  String systemAiCacheClearFailed(String error);
+
+  /// No description provided for @systemAiPullEmptyError.
+  ///
+  /// In en, this message translates to:
+  /// **'Type a model id (e.g. gemma3:4b) first.'**
+  String get systemAiPullEmptyError;
+
+  /// No description provided for @systemAiPullFailedError.
+  ///
+  /// In en, this message translates to:
+  /// **'Pull failed: {error}'**
+  String systemAiPullFailedError(String error);
 }
 
 class _AppLocalizationsDelegate

lib/l10n/app_localizations_de.dart

@@ -663,6 +663,60 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get modulesUninstalling => 'Wird deinstalliert…';
 
+  @override
+  String moduleSheetFailedToLoad(String error) {
+    return 'Laden fehlgeschlagen: $error';
+  }
+
+  @override
+  String get moduleSheetCapabilities => 'Capabilities';
+
+  @override
+  String get moduleSheetPermissions => 'Deklarierte Berechtigungen';
+
+  @override
+  String get moduleSheetNoPermissions => '(keine — reines Berechnungsmodul)';
+
+  @override
+  String get flowsTitle => 'Flows';
+
+  @override
+  String get flowsReloadTooltip => 'Aktualisieren';
+
+  @override
+  String get flowsNoneTitle => 'Keine gespeicherten Flows';
+
+  @override
+  String get flowsNoneHint =>
+      'Flow speichern mit `fai admin flows save <name> <flow.yaml>`, dann taucht er hier auf.';
+
+  @override
+  String flowsRunDialogTitle(String name) {
+    return '$name ausführen';
+  }
+
+  @override
+  String get flowsRunDialogBody =>
+      'Eingaben als key=value, eine pro Zeile. Alle Werte werden als Text-Payloads gesendet. Für binäre Eingaben die `fai run` CLI nutzen.';
+
+  @override
+  String get flowsInputsHint =>
+      'name=World\ntarget_language=English\nsummary_style=three bullet points';
+
+  @override
+  String get flowsRunButton => 'Starten';
+
+  @override
+  String flowsRunningTitle(String name) {
+    return '$name läuft';
+  }
+
+  @override
+  String get flowsRunning => 'Flow läuft…';
+
+  @override
+  String get flowsNoOutputs => 'Flow abgeschlossen ohne deklarierte Outputs.';
+
   @override
   String get approvalsTitle => 'Freigaben';
 
@@ -1005,4 +1059,189 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get searchSavedFlowHint => 'gespeicherter Flow';
+
+  @override
+  String get systemAiTitle => 'System-AI';
+
+  @override
+  String get systemAiIntro =>
+      'Die hub-interne LLM, die die Plattform selbst für Fehlererklärungen und Operator-Hilfe nutzt. Standardmäßig aus; hier konfigurieren. Siehe docs/architecture/system-ai.md, was über die Leitung geht.';
+
+  @override
+  String get systemAiProviderLabel => 'Provider';
+
+  @override
+  String get systemAiEndpointLabel => 'Endpunkt-URL (bis /v1)';
+
+  @override
+  String get systemAiApiKeyRequired =>
+      'API-Key-Umgebungsvariable (erforderlich)';
+
+  @override
+  String get systemAiApiKeyOptional => 'API-Key-Umgebungsvariable (optional)';
+
+  @override
+  String systemAiApiKeyDisclaimer(String name) {
+    return 'Studio liest oder speichert den Key-Wert nie — nur den Namen der Umgebungsvariable. Der Hub liest `\$$name` zur Anfragezeit.';
+  }
+
+  @override
+  String get systemAiTestConnection => 'Verbindung testen';
+
+  @override
+  String get systemAiTesting => 'Teste…';
+
+  @override
+  String get systemAiSave => 'Speichern';
+
+  @override
+  String get systemAiPrivacyHeader => 'PRIVACY-MODUS';
+
+  @override
+  String get systemAiPrivacyOffLabel => 'Aus';
+
+  @override
+  String get systemAiPrivacyOffDesc =>
+      'Feature deaktiviert. Keine Anfragen verlassen den Hub.';
+
+  @override
+  String get systemAiPrivacyRedactedLabel => 'Redigiert';
+
+  @override
+  String get systemAiPrivacyRedactedDesc =>
+      'Nur event_type / error / Modul-Namen. KRITIS-freundlicher Standard.';
+
+  @override
+  String get systemAiPrivacyFullLabel => 'Voll';
+
+  @override
+  String get systemAiPrivacyFullDesc =>
+      'Enthält das Audit-Detail-JSON (nur Hash — keine Roh-Payloads).';
+
+  @override
+  String get systemAiConnectionOk => 'Verbindung ok';
+
+  @override
+  String get systemAiConnectionFailed => 'Verbindung fehlgeschlagen';
+
+  @override
+  String systemAiReplyPrefix(String text) {
+    return 'Antwort: $text';
+  }
+
+  @override
+  String get systemAiModelLabel => 'Modell (erforderlich)';
+
+  @override
+  String get systemAiModelHintFallback =>
+      'Modell-Identifier, den der Provider erwartet';
+
+  @override
+  String get systemAiModelHelperBase =>
+      'Erforderlich: aus der Liste auswählen (Aktualisieren) oder eintippen.';
+
+  @override
+  String get systemAiModelHelperOllama =>
+      'Erforderlich: aus der Liste auswählen (Aktualisieren) oder eintippen. Mit Pull von Ollama herunterladen.';
+
+  @override
+  String get systemAiRefresh => 'Aktualisieren';
+
+  @override
+  String get systemAiPull => 'Pull';
+
+  @override
+  String get systemAiPulling => 'Lade…';
+
+  @override
+  String systemAiCouldNotListModels(String error) {
+    return 'Modelle konnten nicht aufgelistet werden: $error';
+  }
+
+  @override
+  String get systemAiNoModelsOllama =>
+      'Noch keine Modelle auf dem Ollama-Server. Oben eintippen und Pull klicken.';
+
+  @override
+  String get systemAiNoModelsGeneric => 'Provider lieferte keine Modelle.';
+
+  @override
+  String get systemAiSuitabilityRecommended => 'empfohlen';
+
+  @override
+  String get systemAiSuitabilityBalanced => 'ausgewogen';
+
+  @override
+  String get systemAiSuitabilitySmall => 'klein — Qualität evtl. eingeschränkt';
+
+  @override
+  String get systemAiSuitabilityLarge => 'groß — langsamer';
+
+  @override
+  String get systemAiSuitabilityHuge =>
+      'sehr groß — auf einem Laptop wahrscheinlich zu langsam';
+
+  @override
+  String get systemAiSuitabilityUnknown => 'Größe unbekannt';
+
+  @override
+  String systemAiHwDetected(String summary) {
+    return 'Erkannt: $summary';
+  }
+
+  @override
+  String systemAiHwReviewed(String date) {
+    return ' · Kuratierung geprüft $date';
+  }
+
+  @override
+  String systemAiLegendRecommended(String tier) {
+    return 'empfohlen für diese Hardware$tier';
+  }
+
+  @override
+  String get systemAiLegendBalanced => 'ausgewogen (4-8B)';
+
+  @override
+  String get systemAiLegendSmallLarge =>
+      'klein <3B / groß 9-15B / über Hardware';
+
+  @override
+  String get systemAiLegendHuge => 'sehr groß >15B';
+
+  @override
+  String get systemAiLegendUnknown => 'Größe unbekannt';
+
+  @override
+  String systemAiCacheRow(int n) {
+    String _temp0 = intl.Intl.pluralLogic(
+      n,
+      locale: localeName,
+      other: 'gespeicherte Erklärungen',
+      one: 'gespeicherte Erklärung',
+    );
+    return 'Cache: $n $_temp0. Identische Prompts treffen den Cache; Modell- oder Privacy-Modus-Wechsel leeren ihn automatisch.';
+  }
+
+  @override
+  String get systemAiCacheClear => 'Leeren';
+
+  @override
+  String systemAiCacheClearedToast(int n) {
+    return '$n gespeicherte System-AI-Erklärungen gelöscht.';
+  }
+
+  @override
+  String systemAiCacheClearFailed(String error) {
+    return 'Cache-Löschen fehlgeschlagen: $error';
+  }
+
+  @override
+  String get systemAiPullEmptyError =>
+      'Erst eine Modell-ID eintippen (z.B. gemma3:4b).';
+
+  @override
+  String systemAiPullFailedError(String error) {
+    return 'Pull fehlgeschlagen: $error';
+  }
 }

lib/l10n/app_localizations_en.dart

@@ -679,6 +679,60 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get modulesUninstalling => 'Uninstalling…';
 
+  @override
+  String moduleSheetFailedToLoad(String error) {
+    return 'Failed to load: $error';
+  }
+
+  @override
+  String get moduleSheetCapabilities => 'Capabilities';
+
+  @override
+  String get moduleSheetPermissions => 'Declared permissions';
+
+  @override
+  String get moduleSheetNoPermissions => '(none — pure-computation module)';
+
+  @override
+  String get flowsTitle => 'Flows';
+
+  @override
+  String get flowsReloadTooltip => 'Reload';
+
+  @override
+  String get flowsNoneTitle => 'No saved flows';
+
+  @override
+  String get flowsNoneHint =>
+      'Save a flow with `fai admin flows save <name> <flow.yaml>` and it shows up here.';
+
+  @override
+  String flowsRunDialogTitle(String name) {
+    return 'Run $name';
+  }
+
+  @override
+  String get flowsRunDialogBody =>
+      'Inputs as key=value, one per line. All values are sent as text payloads. For binary inputs use the `fai run` CLI.';
+
+  @override
+  String get flowsInputsHint =>
+      'name=World\ntarget_language=English\nsummary_style=three bullet points';
+
+  @override
+  String get flowsRunButton => 'Run';
+
+  @override
+  String flowsRunningTitle(String name) {
+    return 'Running $name';
+  }
+
+  @override
+  String get flowsRunning => 'Flow running…';
+
+  @override
+  String get flowsNoOutputs => 'Flow completed with no declared outputs.';
+
   @override
   String get approvalsTitle => 'Approvals';
 
@@ -1017,4 +1071,187 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get searchSavedFlowHint => 'saved flow';
+
+  @override
+  String get systemAiTitle => 'System AI';
+
+  @override
+  String get systemAiIntro =>
+      'The hub-internal LLM the platform itself uses for inline failure explanations and operator help. Off by default; configure here. See docs/architecture/system-ai.md for what crosses the wire.';
+
+  @override
+  String get systemAiProviderLabel => 'Provider';
+
+  @override
+  String get systemAiEndpointLabel => 'Endpoint URL (up to /v1)';
+
+  @override
+  String get systemAiApiKeyRequired => 'API key env var (required)';
+
+  @override
+  String get systemAiApiKeyOptional => 'API key env var (optional)';
+
+  @override
+  String systemAiApiKeyDisclaimer(String name) {
+    return 'Studio never reads or stores the key value — only its env-var name. The hub reads `\$$name` at request time.';
+  }
+
+  @override
+  String get systemAiTestConnection => 'Test connection';
+
+  @override
+  String get systemAiTesting => 'Testing…';
+
+  @override
+  String get systemAiSave => 'Save';
+
+  @override
+  String get systemAiPrivacyHeader => 'PRIVACY MODE';
+
+  @override
+  String get systemAiPrivacyOffLabel => 'Off';
+
+  @override
+  String get systemAiPrivacyOffDesc =>
+      'Feature disabled. No requests leave the hub.';
+
+  @override
+  String get systemAiPrivacyRedactedLabel => 'Redacted';
+
+  @override
+  String get systemAiPrivacyRedactedDesc =>
+      'Only event_type / error / module names. KRITIS-friendly default.';
+
+  @override
+  String get systemAiPrivacyFullLabel => 'Full';
+
+  @override
+  String get systemAiPrivacyFullDesc =>
+      'Includes the audit detail JSON (hash-only — no raw payloads).';
+
+  @override
+  String get systemAiConnectionOk => 'Connection ok';
+
+  @override
+  String get systemAiConnectionFailed => 'Connection failed';
+
+  @override
+  String systemAiReplyPrefix(String text) {
+    return 'Reply: $text';
+  }
+
+  @override
+  String get systemAiModelLabel => 'Model (required)';
+
+  @override
+  String get systemAiModelHintFallback =>
+      'model identifier the provider expects';
+
+  @override
+  String get systemAiModelHelperBase =>
+      'Required: pick from the list (Refresh) or type one.';
+
+  @override
+  String get systemAiModelHelperOllama =>
+      'Required: pick from the list (Refresh) or type one. Use Pull to download from Ollama.';
+
+  @override
+  String get systemAiRefresh => 'Refresh';
+
+  @override
+  String get systemAiPull => 'Pull';
+
+  @override
+  String get systemAiPulling => 'Pulling…';
+
+  @override
+  String systemAiCouldNotListModels(String error) {
+    return 'Could not list models: $error';
+  }
+
+  @override
+  String get systemAiNoModelsOllama =>
+      'No models on the Ollama server yet. Type one above and click Pull.';
+
+  @override
+  String get systemAiNoModelsGeneric => 'Provider returned no models.';
+
+  @override
+  String get systemAiSuitabilityRecommended => 'recommended';
+
+  @override
+  String get systemAiSuitabilityBalanced => 'balanced';
+
+  @override
+  String get systemAiSuitabilitySmall => 'small — quality may be limited';
+
+  @override
+  String get systemAiSuitabilityLarge => 'large — slower';
+
+  @override
+  String get systemAiSuitabilityHuge => 'huge — likely too slow on a laptop';
+
+  @override
+  String get systemAiSuitabilityUnknown => 'size unknown';
+
+  @override
+  String systemAiHwDetected(String summary) {
+    return 'Detected: $summary';
+  }
+
+  @override
+  String systemAiHwReviewed(String date) {
+    return ' · curation reviewed $date';
+  }
+
+  @override
+  String systemAiLegendRecommended(String tier) {
+    return 'recommended for this hardware$tier';
+  }
+
+  @override
+  String get systemAiLegendBalanced => 'balanced (4-8B)';
+
+  @override
+  String get systemAiLegendSmallLarge =>
+      'small <3B / large 9-15B / above hardware';
+
+  @override
+  String get systemAiLegendHuge => 'huge >15B';
+
+  @override
+  String get systemAiLegendUnknown => 'size unknown';
+
+  @override
+  String systemAiCacheRow(int n) {
+    String _temp0 = intl.Intl.pluralLogic(
+      n,
+      locale: localeName,
+      other: 'explanations',
+      one: 'explanation',
+    );
+    return 'Cache: $n cached $_temp0. Identical prompts hit the cache; switching model or privacy mode flushes automatically.';
+  }
+
+  @override
+  String get systemAiCacheClear => 'Clear';
+
+  @override
+  String systemAiCacheClearedToast(int n) {
+    return 'Cleared $n cached System-AI explanations.';
+  }
+
+  @override
+  String systemAiCacheClearFailed(String error) {
+    return 'Cache clear failed: $error';
+  }
+
+  @override
+  String get systemAiPullEmptyError =>
+      'Type a model id (e.g. gemma3:4b) first.';
+
+  @override
+  String systemAiPullFailedError(String error) {
+    return 'Pull failed: $error';
+  }
 }

lib/main.dart

@@ -26,7 +26,7 @@ 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 = '0.27.0';
+const String kStudioVersion = '0.28.0';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();

lib/pages/flows.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 
 import '../data/hub.dart';
+import '../l10n/app_localizations.dart';
 import '../theme/theme.dart';
 import '../theme/tokens.dart';
 import '../widgets/widgets.dart';
@@ -38,14 +39,15 @@ class _FlowsPageState extends State<FlowsPage> {
 
   @override
   Widget build(BuildContext context) {
+    final l = AppLocalizations.of(context)!;
     return Scaffold(
       backgroundColor: Theme.of(context).scaffoldBackgroundColor,
       appBar: AppBar(
-        title: const Text('Flows'),
+        title: Text(l.flowsTitle),
         actions: [
           IconButton(
             icon: const Icon(Icons.refresh, size: 18),
-            tooltip: 'Reload',
+            tooltip: l.flowsReloadTooltip,
             onPressed: _refresh,
           ),
           const SizedBox(width: FaiSpace.sm),
@@ -61,21 +63,20 @@ class _FlowsPageState extends State<FlowsPage> {
             return FaiEmptyState(
               icon: Icons.cloud_off_outlined,
               iconColor: Theme.of(context).colorScheme.error,
-              title: 'Hub unreachable',
+              title: l.hubUnreachable,
-              hint: 'Start the hub with `fai serve`.',
+              hint: l.hubUnreachableHint,
               action: FilledButton.tonal(
                 onPressed: _refresh,
-                child: const Text('Retry'),
+                child: Text(l.buttonRetry),
               ),
             );
           }
           final flows = snapshot.data ?? [];
           if (flows.isEmpty) {
-            return const FaiEmptyState(
+            return FaiEmptyState(
               icon: Icons.account_tree_outlined,
-              title: 'No saved flows',
+              title: l.flowsNoneTitle,
-              hint:
+              hint: l.flowsNoneHint,
-                  'Save a flow with `fai admin flows save <name> <flow.yaml>` and it shows up here.',
             );
           }
           return ListView.separated(
@@ -139,7 +140,7 @@ class _FlowCard extends StatelessWidget {
           FilledButton.icon(
             onPressed: onRun,
             icon: const Icon(Icons.play_arrow, size: 16),
-            label: const Text('Run'),
+            label: Text(AppLocalizations.of(context)!.flowsRunButton),
           ),
         ],
       ),
@@ -194,8 +195,9 @@ class _FlowInputDialogState extends State<_FlowInputDialog> {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     return AlertDialog(
-      title: Text('Run ${widget.flow.name}'),
+      title: Text(l.flowsRunDialogTitle(widget.flow.name)),
       shape: RoundedRectangleBorder(
         borderRadius: BorderRadius.circular(FaiRadius.md),
       ),
@@ -206,7 +208,7 @@ class _FlowInputDialogState extends State<_FlowInputDialog> {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             Text(
-              'Inputs as key=value, one per line. All values are sent as text payloads. For binary inputs use the `fai run` CLI.',
+              l.flowsRunDialogBody,
               style: theme.textTheme.bodySmall?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),
@@ -219,10 +221,9 @@ class _FlowInputDialogState extends State<_FlowInputDialog> {
                 expands: true,
                 textAlignVertical: TextAlignVertical.top,
                 style: FaiTheme.mono(size: 12),
-                decoration: const InputDecoration(
+                decoration: InputDecoration(
-                  hintText:
+                  hintText: l.flowsInputsHint,
-                      'name=World\ntarget_language=English\nsummary_style=three bullet points',
+                  border: const OutlineInputBorder(),
-                  border: OutlineInputBorder(),
                   isDense: true,
                 ),
               ),
@@ -233,11 +234,11 @@ class _FlowInputDialogState extends State<_FlowInputDialog> {
       actions: [
         TextButton(
           onPressed: () => Navigator.pop(context, null),
-          child: const Text('Cancel'),
+          child: Text(l.buttonCancel),
         ),
         FilledButton.icon(
           icon: const Icon(Icons.play_arrow, size: 16),
-          label: const Text('Run'),
+          label: Text(l.flowsRunButton),
           onPressed: () => Navigator.pop(context, _parsePairs()),
         ),
       ],
@@ -270,8 +271,9 @@ class _FlowRunDialogState extends State<_FlowRunDialog> {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     return AlertDialog(
-      title: Text('Running ${widget.flow.name}'),
+      title: Text(l.flowsRunningTitle(widget.flow.name)),
       shape: RoundedRectangleBorder(
         borderRadius: BorderRadius.circular(FaiRadius.md),
       ),
@@ -288,7 +290,7 @@ class _FlowRunDialogState extends State<_FlowRunDialog> {
                   const CircularProgressIndicator(),
                   const SizedBox(height: FaiSpace.md),
                   Text(
-                    'Flow running…',
+                    l.flowsRunning,
                     style: theme.textTheme.bodySmall?.copyWith(
                       color: theme.colorScheme.onSurfaceVariant,
                     ),
@@ -322,7 +324,7 @@ class _FlowRunDialogState extends State<_FlowRunDialog> {
             final outputs = snapshot.data ?? const {};
             if (outputs.isEmpty) {
               return Text(
-                'Flow completed with no declared outputs.',
+                l.flowsNoOutputs,
                 style: theme.textTheme.bodyMedium,
               );
             }
@@ -368,7 +370,7 @@ class _FlowRunDialogState extends State<_FlowRunDialog> {
       actions: [
         TextButton(
           onPressed: () => Navigator.pop(context),
-          child: const Text('Close'),
+          child: Text(l.buttonClose),
         ),
       ],
     );

lib/widgets/fai_module_sheet.dart

@@ -114,7 +114,8 @@ class _FaiModuleSheetState extends State<FaiModuleSheet> {
                 Padding(
                   padding: const EdgeInsets.all(FaiSpace.xl),
                   child: Text(
-                    'Failed to load: ${snapshot.error}',
+                    AppLocalizations.of(context)!
+                        .moduleSheetFailedToLoad(snapshot.error.toString()),
                     style: theme.textTheme.bodyMedium?.copyWith(
                       color: theme.colorScheme.error,
                     ),
@@ -168,6 +169,7 @@ class _Body extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     return ListView(
       padding: const EdgeInsets.fromLTRB(
         FaiSpace.xxl,
@@ -202,7 +204,7 @@ class _Body extends StatelessWidget {
           ),
         ),
         const SizedBox(height: FaiSpace.xl),
-        _SectionHeader('Capabilities'),
+        _SectionHeader(l.moduleSheetCapabilities),
         const SizedBox(height: FaiSpace.sm),
         Wrap(
           spacing: FaiSpace.xs,
@@ -218,11 +220,11 @@ class _Body extends StatelessWidget {
               .toList(),
         ),
         const SizedBox(height: FaiSpace.xl),
-        _SectionHeader('Declared permissions'),
+        _SectionHeader(l.moduleSheetPermissions),
         const SizedBox(height: FaiSpace.sm),
         if (detail.permissions.isEmpty)
           Text(
-            '(none — pure-computation module)',
+            l.moduleSheetNoPermissions,
             style: theme.textTheme.bodySmall?.copyWith(
               color: theme.colorScheme.onSurfaceVariant,
               fontStyle: FontStyle.italic,

lib/widgets/fai_system_ai_editor.dart

@@ -7,6 +7,7 @@
 import 'package:flutter/material.dart';
 
 import '../data/hub.dart';
+import '../l10n/app_localizations.dart';
 import '../theme/theme.dart';
 import '../theme/tokens.dart';
 import 'fai_pill.dart';
@@ -244,19 +245,18 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
     try {
       final purged = await HubService.instance.clearSystemLlmCache();
       if (!mounted) return;
+      final l = AppLocalizations.of(context)!;
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text('Cleared $purged cached System-AI explanations.')),
+        SnackBar(content: Text(l.systemAiCacheClearedToast(purged))),
       );
-      // Pop with the same status (since the editor's `initial`
-      // is now stale w.r.t. cacheCount); caller will re-fetch
-      // status on next open.
       setState(() {
         // Force a rebuild that hides the row; cheap.
       });
     } catch (e) {
       if (!mounted) return;
+      final l = AppLocalizations.of(context)!;
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text('Cache clear failed: $e')),
+        SnackBar(content: Text(l.systemAiCacheClearFailed(e.toString()))),
       );
     }
   }
@@ -315,8 +315,9 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
 
   Future<void> _pullModel() async {
     final wanted = _model.text.trim();
+    final l = AppLocalizations.of(context)!;
     if (wanted.isEmpty) {
-      setState(() => _error = 'Type a model id (e.g. gemma3:4b) first.');
+      setState(() => _error = l.systemAiPullEmptyError);
       return;
     }
     setState(() {
@@ -332,7 +333,7 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
     setState(() {
       _pulling = false;
       if (r.errorKind.isNotEmpty) {
-        _error = 'Pull failed: ${r.text}';
+        _error = l.systemAiPullFailedError(r.text);
       } else {
         _error = null;
       }
@@ -347,8 +348,9 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     return AlertDialog(
-      title: const Text('System AI'),
+      title: Text(l.systemAiTitle),
       shape: RoundedRectangleBorder(
         borderRadius: BorderRadius.circular(FaiRadius.md),
       ),
@@ -364,9 +366,7 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
             crossAxisAlignment: CrossAxisAlignment.start,
             children: [
               Text(
-                'The hub-internal LLM the platform itself uses for inline failure '
+                l.systemAiIntro,
-                'explanations and operator help. Off by default; configure here. '
-                'See docs/architecture/system-ai.md for what crosses the wire.',
                 style: theme.textTheme.bodySmall?.copyWith(
                   color: theme.colorScheme.onSurfaceVariant,
                 ),
@@ -391,9 +391,9 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
               TextField(
                 controller: _endpoint,
                 style: FaiTheme.mono(size: 12),
-                decoration: const InputDecoration(
+                decoration: InputDecoration(
-                  labelText: 'Endpoint URL (up to /v1)',
+                  labelText: l.systemAiEndpointLabel,
-                  border: OutlineInputBorder(),
+                  border: const OutlineInputBorder(),
                   isDense: true,
                 ),
               ),
@@ -420,8 +420,8 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
                 style: FaiTheme.mono(size: 12),
                 decoration: InputDecoration(
                   labelText: _preset.wire == 'openai'
-                      ? 'API key env var (required)'
+                      ? l.systemAiApiKeyRequired
-                      : 'API key env var (optional)',
+                      : l.systemAiApiKeyOptional,
                   hintText: 'OPENAI_API_KEY',
                   prefixText: '\$',
                   border: const OutlineInputBorder(),
@@ -430,8 +430,7 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
               ),
               const SizedBox(height: 4),
               Text(
-                'Studio never reads or stores the key value — only its env-var name. '
+                l.systemAiApiKeyDisclaimer('<name>'),
-                'The hub reads `\$<name>` at request time.',
                 style: theme.textTheme.bodySmall?.copyWith(
                   color: theme.colorScheme.onSurfaceVariant,
                 ),
@@ -470,12 +469,12 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
           onPressed: _saving || _testing
               ? null
               : () => Navigator.pop(context, null),
-          child: const Text('Cancel'),
+          child: Text(l.buttonCancel),
         ),
         OutlinedButton.icon(
           onPressed: _saving || _testing ? null : _test,
           icon: const Icon(Icons.play_arrow, size: 16),
-          label: Text(_testing ? 'Testing…' : 'Test connection'),
+          label: Text(_testing ? l.systemAiTesting : l.systemAiTestConnection),
         ),
         FilledButton(
           onPressed: _saving || _testing ? null : () => _save(),
@@ -485,7 +484,7 @@ class _FaiSystemAiEditorState extends State<FaiSystemAiEditor> {
                   height: 16,
                   child: CircularProgressIndicator(strokeWidth: 2),
                 )
-              : const Text('Save'),
+              : Text(l.systemAiSave),
         ),
       ],
     );
@@ -503,12 +502,13 @@ class _ProviderDropdown extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l = AppLocalizations.of(context)!;
     return DropdownButtonFormField<String>(
       initialValue: value.wire,
       isDense: true,
-      decoration: const InputDecoration(
+      decoration: InputDecoration(
-        labelText: 'Provider',
+        labelText: l.systemAiProviderLabel,
-        border: OutlineInputBorder(),
+        border: const OutlineInputBorder(),
         isDense: true,
       ),
       items: _ProviderPreset.all
@@ -539,24 +539,25 @@ class _PrivacyModeChips extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
-    const modes = <(String, String, String)>[
+    final l = AppLocalizations.of(context)!;
-      ('off', 'Off', 'Feature disabled. No requests leave the hub.'),
+    final modes = <(String, String, String)>[
+      ('off', l.systemAiPrivacyOffLabel, l.systemAiPrivacyOffDesc),
       (
         'redacted',
-        'Redacted',
+        l.systemAiPrivacyRedactedLabel,
-        'Only event_type / error / module names. KRITIS-friendly default.',
+        l.systemAiPrivacyRedactedDesc,
       ),
       (
         'full',
-        'Full',
+        l.systemAiPrivacyFullLabel,
-        'Includes the audit detail JSON (hash-only — no raw payloads).',
+        l.systemAiPrivacyFullDesc,
       ),
     ];
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         Text(
-          'PRIVACY MODE',
+          l.systemAiPrivacyHeader,
           style: theme.textTheme.labelSmall?.copyWith(
             color: theme.colorScheme.onSurfaceVariant,
             letterSpacing: 0.6,
@@ -611,6 +612,7 @@ class _TestResultPanel extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     final ok = result.isSuccess;
     final color = ok ? FaiColors.success : theme.colorScheme.error;
     return Container(
@@ -633,7 +635,7 @@ class _TestResultPanel extends StatelessWidget {
               ),
               const SizedBox(width: FaiSpace.xs),
               Text(
-                ok ? 'Connection ok' : 'Connection failed',
+                ok ? l.systemAiConnectionOk : l.systemAiConnectionFailed,
                 style: theme.textTheme.bodyMedium?.copyWith(
                   color: color,
                 ),
@@ -649,7 +651,7 @@ class _TestResultPanel extends StatelessWidget {
           ),
           const SizedBox(height: 4),
           SelectableText(
-            ok ? 'Reply: ${result.text}' : result.text,
+            ok ? l.systemAiReplyPrefix(result.text) : result.text,
             style: FaiTheme.mono(
               size: 11,
               color: theme.colorScheme.onSurface,
@@ -707,6 +709,7 @@ class _ModelPicker extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
@@ -720,12 +723,14 @@ class _ModelPicker extends StatelessWidget {
                   controller: controller,
                   style: FaiTheme.mono(size: 12),
                   decoration: InputDecoration(
-                    labelText: 'Model (required)',
+                    labelText: l.systemAiModelLabel,
                     hintText: preset.modelHint.isEmpty
-                        ? 'model identifier the provider expects'
+                        ? l.systemAiModelHintFallback
                         : preset.modelHint,
                     helperText: controller.text.trim().isEmpty
-                        ? 'Required: pick from the list (Refresh) or type one. ${_isOllama ? "Use Pull to download from Ollama." : ""}'
+                        ? (_isOllama
+                            ? l.systemAiModelHelperOllama
+                            : l.systemAiModelHelperBase)
                         : null,
                     helperMaxLines: 2,
                     border: const OutlineInputBorder(),
@@ -744,7 +749,7 @@ class _ModelPicker extends StatelessWidget {
                       child: CircularProgressIndicator(strokeWidth: 2),
                     )
                   : const Icon(Icons.refresh, size: 16),
-              label: const Text('Refresh'),
+              label: Text(l.systemAiRefresh),
             ),
             if (_isOllama) ...[
               const SizedBox(width: FaiSpace.sm),
@@ -757,7 +762,7 @@ class _ModelPicker extends StatelessWidget {
                         child: CircularProgressIndicator(strokeWidth: 2),
                       )
                     : const Icon(Icons.download, size: 16),
-                label: Text(pulling ? 'Pulling…' : 'Pull'),
+                label: Text(pulling ? l.systemAiPulling : l.systemAiPull),
               ),
             ],
           ],
@@ -765,7 +770,7 @@ class _ModelPicker extends StatelessWidget {
         if (modelsError != null) ...[
           const SizedBox(height: 4),
           Text(
-            'Could not list models: $modelsError',
+            l.systemAiCouldNotListModels(modelsError!),
             style: theme.textTheme.bodySmall?.copyWith(
               color: theme.colorScheme.error,
             ),
@@ -776,8 +781,8 @@ class _ModelPicker extends StatelessWidget {
           if (models!.isEmpty)
             Text(
               _isOllama
-                  ? 'No models on the Ollama server yet. Type one above and click Pull.'
+                  ? l.systemAiNoModelsOllama
-                  : 'Provider returned no models.',
+                  : l.systemAiNoModelsGeneric,
               style: theme.textTheme.bodySmall?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),
@@ -827,20 +832,21 @@ enum _Suitability {
 }
 
 extension _SuitabilityCopy on _Suitability {
-  String get label {
+  String labelFor(BuildContext context) {
+    final l = AppLocalizations.of(context)!;
     switch (this) {
       case _Suitability.recommended:
-        return 'recommended';
+        return l.systemAiSuitabilityRecommended;
       case _Suitability.balanced:
-        return 'balanced';
+        return l.systemAiSuitabilityBalanced;
       case _Suitability.small:
-        return 'small — quality may be limited';
+        return l.systemAiSuitabilitySmall;
       case _Suitability.large:
-        return 'large — slower';
+        return l.systemAiSuitabilityLarge;
       case _Suitability.huge:
-        return 'huge — likely too slow on a laptop';
+        return l.systemAiSuitabilityHuge;
       case _Suitability.unknown:
-        return 'size unknown';
+        return l.systemAiSuitabilityUnknown;
     }
   }
 
@@ -970,8 +976,8 @@ class _ModelChip extends StatelessWidget {
     required this.onTap,
   });
 
-  String _tooltipFor(BuildContext _) {
+  String _tooltipFor(BuildContext context) {
-    final lines = <String>[suitability.label];
+    final lines = <String>[suitability.labelFor(context)];
     final c = curated;
     if (c != null) {
       lines.add(
@@ -1023,8 +1029,9 @@ class _HardwareBanner extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     final lr = (lastReviewed != null && lastReviewed!.isNotEmpty)
-        ? ' · curation reviewed $lastReviewed'
+        ? l.systemAiHwReviewed(lastReviewed!)
         : '';
     return Container(
       padding: const EdgeInsets.symmetric(
@@ -1046,7 +1053,7 @@ class _HardwareBanner extends StatelessWidget {
           const SizedBox(width: 6),
           Expanded(
             child: Text(
-              'Detected: ${hw.summary}$lr',
+              '${l.systemAiHwDetected(hw.summary)}$lr',
               style: theme.textTheme.bodySmall?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),
@@ -1065,6 +1072,7 @@ class _SuitabilityLegend extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     Widget dot(Color c, String label) => Padding(
           padding: const EdgeInsets.only(right: FaiSpace.md),
           child: Row(
@@ -1094,7 +1102,7 @@ class _SuitabilityLegend extends StatelessWidget {
               Icon(Icons.star, size: 11, color: FaiColors.success),
               const SizedBox(width: 4),
               Text(
-                'recommended for this hardware$tierTag',
+                l.systemAiLegendRecommended(tierTag),
                 style: theme.textTheme.bodySmall?.copyWith(
                   color: theme.colorScheme.onSurfaceVariant,
                   fontSize: 11,
@@ -1103,10 +1111,10 @@ class _SuitabilityLegend extends StatelessWidget {
             ],
           ),
         ),
-        dot(theme.colorScheme.primary, 'balanced (4-8B)'),
+        dot(theme.colorScheme.primary, l.systemAiLegendBalanced),
-        dot(FaiColors.warning, 'small <3B / large 9-15B / above hardware'),
+        dot(FaiColors.warning, l.systemAiLegendSmallLarge),
-        dot(theme.colorScheme.error, 'huge >15B'),
+        dot(theme.colorScheme.error, l.systemAiLegendHuge),
-        dot(theme.colorScheme.outline, 'size unknown'),
+        dot(theme.colorScheme.outline, l.systemAiLegendUnknown),
       ],
     );
   }
@@ -1126,6 +1134,7 @@ class _CacheStatusRow extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
     return Container(
       padding: const EdgeInsets.symmetric(
         horizontal: FaiSpace.sm,
@@ -1146,9 +1155,7 @@ class _CacheStatusRow extends StatelessWidget {
           const SizedBox(width: 6),
           Expanded(
             child: Text(
-              'Cache: $cacheCount cached explanation${cacheCount == 1 ? "" : "s"}. '
+              l.systemAiCacheRow(cacheCount),
-              'Identical prompts hit the cache; switching model or privacy '
-              'mode flushes automatically.',
               style: theme.textTheme.bodySmall?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),
@@ -1157,7 +1164,7 @@ class _CacheStatusRow extends StatelessWidget {
           TextButton.icon(
             onPressed: onClear,
             icon: const Icon(Icons.delete_outline, size: 14),
-            label: const Text('Clear'),
+            label: Text(l.systemAiCacheClear),
           ),
         ],
       ),

pubspec.yaml

@@ -1,7 +1,7 @@
 name: fai_studio
 description: "F∆I Studio — desktop GUI for the F∆I hub"
 publish_to: 'none'
-version: 0.27.0
+version: 0.28.0
 
 environment:
   sdk: ^3.11.0-200.1.beta