feat: add desktop ui foundation

docs/CHATGPT_HANDOFF.md

@@ -109,6 +109,8 @@ Rootserver:
 - Ollama, Gemini, Hybridrouter, Chatservice und CLI streamen sichtbare Antwortteile.
   Verdeckte Gedanken werden nicht angefordert oder ausgegeben; Terminal-Markdown
   wird lesbar bereinigt. Strg+C verwirft Teilantworten atomar und kehrt zum Chat zurück.
+- Desktop-MVP auf `feat/desktop-ui` begonnen: PySide6, gemeinsamer CLI-/GUI-
+  Runtime-Builder, Qt-freier Controller und ruhiges Drei-Spalten-Grundgerüst vorhanden.
 
 ## Aktuelle Architektur
 
@@ -189,8 +191,8 @@ Letzter bestätigter Projektstand:
 - uv-Lock und `uv sync --dev`: bestanden
 - Python in `.venv`: 3.12.13
 - Ruff in `.venv`: 0.16.0
-- Unit-Tests: 91 bestanden; Navigation, Streaming, Migration, Datenschutz,
+- Unit-Tests: 94 bestanden; zusätzlich Runtime-Adapter, Qt-freier Controller,
-  ID-Präfixe, begrenzte Suche und SQL-Sonderzeichen abgedeckt
+  Secretmaskierung sowie neuer und bestehender CLI-Parserpfad abgedeckt
 - PowerShell-Syntax des Startskripts: erfolgreich geparst
 - Ruff Lint: bestanden
 - Ruff Formatprüfung: bestanden
@@ -235,7 +237,8 @@ Abnahmestatus:
 
 ## Git-Stand
 
-- aktueller und geprüfter Branch: `main`
+- aktueller Arbeitsbranch: `feat/desktop-ui`
+- stabiler Ausgangsstand: `main` bei `d3e85f2`
 - stabiler Ausgangsstand: `main` bei `77b510b`
 - medizinischer Datenschutz-Fix: `9148193`
 - Provider- und CLI-Streaming: `00a5a6c`
@@ -248,11 +251,6 @@ Abnahmestatus:
 - konfliktfreier Merge nach `main`: `564a3fd`
 - 66 Unit-Tests, Ruff und Strukturprüfung auf dem gemergten `main` bestanden
 - `main` erfolgreich bis `3361eae` zu `origin/main` gepusht und synchron verifiziert
-- Secret-Provider: `570e7fa`
-- Datenschutz/Nullkosten: `286d96d`
-- isolierter Gemini-Provider: `f3e1183`
-- Hybridrouter: `e57186f`
-- lokale Konfiguration: `ab6ea48`
 - CLI-Verdrahtung: `af9426e`
 - Startskript: `141ff2e`
 - Resttests: `a0af15a`
@@ -289,8 +287,8 @@ Abnahmestatus:
 
 ## Nächster sinnvoller Auftrag
 
-Chatkomfort ist implementiert, gemergt, auf `main` erneut geprüft und gepusht.
+Auf `feat/desktop-ui` als Nächstes Freigabedialog mit drei Ergebnissen,
-Jetzt stoppen und mit Pascal erst später ein einzelnes nächstes Paket festlegen.
+Qt-Worker-Abbruch, Sitzungsbedienung und bereinigte Statusanzeige gezielt testen.
 Medizinische Antwortqualität bleibt ein späteres Sicherheits-/Systemprompt-Thema.
 Noch keine Obsidian-Integration oder Tools beginnen.
 

pyproject.toml

@@ -11,6 +11,7 @@ requires-python = ">=3.11"
 dependencies = [
     "google-genai>=2.6,<3",
     "keyring>=25.7,<26",
+    "pyside6>=6.8,<7",
 ]
 
 [project.scripts]
@@ -18,6 +19,7 @@ javis = "javis.interface.cli:main"
 
 [dependency-groups]
 dev = [
+    "pytest>=8,<9",
     "ruff>=0.12,<1",
 ]
 

src/javis/core/runtime.py

@@ -0,0 +1,145 @@
+"""Shared runtime assembly for CLI and desktop interfaces."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from javis.config.settings import Settings
+from javis.core.chat_service import ChatService
+from javis.core.provider_router import ApprovalCallback, HybridProvider, NoticeCallback
+from javis.memory.sqlite_store import SQLiteSessionStore
+from javis.memory.usage_store import SQLiteUsageStore, UsageStoreError
+from javis.providers.base import MissingApiKeyError
+from javis.providers.gemini import GeminiProvider
+from javis.providers.ollama import OllamaProvider
+from javis.security.privacy import PrivacyRouter
+from javis.security.secrets import SecretProvider, SecretStoreError
+
+
+@dataclass(frozen=True, slots=True)
+class RuntimeStatus:
+    ollama_reachable: bool
+    local_model_available: bool
+    local_model: str
+    gemini_key_available: bool
+    gemini_configured: bool
+    free_only: bool
+    provider_mode: str
+    cloud_requests_today: int | None
+    local_fallbacks_today: int | None
+    data_dir: str
+
+    def cli_lines(self) -> list[str]:
+        cloud_requests = (
+            self.cloud_requests_today if self.cloud_requests_today is not None else "unbekannt"
+        )
+        local_fallbacks = (
+            self.local_fallbacks_today if self.local_fallbacks_today is not None else "unbekannt"
+        )
+        return [
+            f"Ollama erreichbar: {'ja' if self.ollama_reachable else 'nein'}",
+            f"Lokales Modell vorhanden: {'ja' if self.local_model_available else 'nein'}",
+            f"Gemini-Schlüssel vorhanden: {'ja' if self.gemini_key_available else 'nein'}",
+            f"Gemini konfiguriert: {'ja' if self.gemini_configured else 'nein'}",
+            f"Nullkostenmodus: {'aktiv' if self.free_only else 'inaktiv'}",
+            f"Aktiver Providermodus: {self.provider_mode}",
+            f"Heutige Cloudanfragen: {cloud_requests}",
+            f"Heutige lokale Fallbacks: {local_fallbacks}",
+        ]
+
+
+@dataclass(slots=True)
+class JavisRuntime:
+    settings: Settings
+    service: ChatService
+    local_provider: OllamaProvider
+    hybrid_provider: HybridProvider
+    usage_store: SQLiteUsageStore
+    secrets: SecretProvider
+
+    def status(self) -> RuntimeStatus:
+        ollama = self.local_provider.probe()
+        try:
+            key_available = self.secrets.gemini_key_available()
+        except SecretStoreError:
+            key_available = False
+        try:
+            cloud_requests: int | None = self.usage_store.cloud_requests_on()
+            local_fallbacks: int | None = self.usage_store.local_fallbacks_on()
+        except UsageStoreError:
+            cloud_requests = local_fallbacks = None
+        return RuntimeStatus(
+            ollama_reachable=ollama.reachable,
+            local_model_available=ollama.model_available,
+            local_model=self.local_provider.model,
+            gemini_key_available=key_available,
+            gemini_configured=(
+                self.settings.gemini_enabled
+                and self.settings.free_only
+                and self.settings.billing_confirmed_disabled
+            ),
+            free_only=self.settings.free_only,
+            provider_mode=self.hybrid_provider.mode,
+            cloud_requests_today=cloud_requests,
+            local_fallbacks_today=local_fallbacks,
+            data_dir=str(self.settings.data_dir),
+        )
+
+
+def build_javis_runtime(
+    settings: Settings,
+    *,
+    approval_callback: ApprovalCallback,
+    notice_callback: NoticeCallback,
+    secret_provider: SecretProvider | None = None,
+) -> JavisRuntime:
+    """Assemble the existing core once for any user interface."""
+
+    store = SQLiteSessionStore(settings.database_path)
+    usage_store = SQLiteUsageStore(settings.usage_database_path)
+    secrets = secret_provider or SecretProvider()
+    local = OllamaProvider(
+        settings.model,
+        settings.ollama_base_url,
+        settings.timeout_seconds,
+    )
+
+    def create_cloud_provider() -> GeminiProvider:
+        try:
+            key = secrets.get_gemini_key()
+        except SecretStoreError as exc:
+            raise MissingApiKeyError(
+                "Der Gemini-Schlüssel konnte nicht sicher geladen werden."
+            ) from exc
+        return GeminiProvider(
+            model=settings.gemini_model,
+            api_key=key,
+            timeout_seconds=settings.gemini_timeout_seconds,
+            max_output_tokens=settings.max_cloud_output_tokens,
+            max_retries=settings.gemini_max_retries,
+        )
+
+    hybrid = HybridProvider(
+        local_provider=local,
+        cloud_provider_factory=create_cloud_provider,
+        cloud_model=settings.gemini_model,
+        privacy_router=PrivacyRouter(),
+        usage_store=usage_store,
+        approval_callback=approval_callback,
+        notice_callback=notice_callback,
+        mode=settings.provider_mode,
+        cloud_enabled=settings.gemini_enabled,
+        billing_confirmed_disabled=settings.billing_confirmed_disabled,
+        free_only=settings.free_only,
+        max_cloud_requests_per_day=settings.max_cloud_requests_per_day,
+        max_cloud_input_chars=settings.max_cloud_input_chars,
+        max_cloud_context_messages=settings.max_cloud_context_messages,
+    )
+    return JavisRuntime(
+        settings=settings,
+        service=ChatService(store, hybrid),
+        local_provider=local,
+        hybrid_provider=hybrid,
+        usage_store=usage_store,
+        secrets=secrets,
+    )

src/javis/interface/cli.py

@@ -12,19 +12,15 @@ from pathlib import Path
 from javis.config.local_config import LocalConfigError, write_gemini_activation
 from javis.config.settings import ConfigurationError, Settings
 from javis.core.chat_service import ChatService, SessionProviderMismatchError
-from javis.core.provider_router import HybridProvider
+from javis.core.runtime import build_javis_runtime
 from javis.memory.sqlite_store import (
     AmbiguousSessionReferenceError,
     ChatSession,
     SessionNotFoundError,
     SessionStoreError,
-    SQLiteSessionStore,
 )
-from javis.memory.usage_store import SQLiteUsageStore, UsageStoreError
+from javis.memory.usage_store import UsageStoreError
-from javis.providers.base import MissingApiKeyError, ProviderError
+from javis.providers.base import ProviderError
-from javis.providers.gemini import GeminiProvider
-from javis.providers.ollama import OllamaProvider
-from javis.security.privacy import PrivacyDecision, PrivacyRouter
 from javis.security.secrets import SecretProvider, SecretStoreError
 
 InputFunction = Callable[[str], str]
@@ -52,6 +48,7 @@ def build_parser() -> argparse.ArgumentParser:
     subparsers = parser.add_subparsers(dest="command", required=True)
     chat_parser = subparsers.add_parser("chat", help="lokalen Textchat starten")
     chat_parser.add_argument("--session", help="vorhandene Sitzungs-ID laden")
+    subparsers.add_parser("gui", help="Javis-Desktopoberfläche starten")
     configure_parser = subparsers.add_parser(
         "configure",
         help="nicht geheime lokale Einstellungen einrichten",
@@ -385,79 +382,21 @@ def build_runtime(
     output: OutputFunction,
     secret_provider: SecretProvider | None = None,
 ) -> tuple[ChatService, StatusFunction]:
-    store = SQLiteSessionStore(settings.database_path)
+    def approve(_decision: object) -> bool:
-    usage_store = SQLiteUsageStore(settings.usage_database_path)
+        answer = input_fn("Cloudfreigabe erforderlich. Einmalig erlauben? [j/N] ")
-    secrets = secret_provider or SecretProvider()
-    local = OllamaProvider(
-        settings.model,
-        settings.ollama_base_url,
-        settings.timeout_seconds,
-    )
-
-    def approve(decision: PrivacyDecision) -> bool:
-        answer = input_fn(
-            f"Cloudfreigabe erforderlich ({decision.reason}). Einmalig erlauben? [j/N] "
-        )
         return _confirmed(answer)
 
-    def create_cloud_provider() -> GeminiProvider:
+    runtime = build_javis_runtime(
-        try:
+        settings,
-            key = secrets.get_gemini_key()
-        except SecretStoreError as exc:
-            raise MissingApiKeyError(
-                "Der Gemini-Schlüssel konnte nicht sicher geladen werden."
-            ) from exc
-        return GeminiProvider(
-            model=settings.gemini_model,
-            api_key=key,
-            timeout_seconds=settings.gemini_timeout_seconds,
-            max_output_tokens=settings.max_cloud_output_tokens,
-            max_retries=settings.gemini_max_retries,
-        )
-
-    hybrid = HybridProvider(
-        local_provider=local,
-        cloud_provider_factory=create_cloud_provider,
-        cloud_model=settings.gemini_model,
-        privacy_router=PrivacyRouter(),
-        usage_store=usage_store,
         approval_callback=approve,
         notice_callback=output,
-        mode=settings.provider_mode,
+        secret_provider=secret_provider,
-        cloud_enabled=settings.gemini_enabled,
-        billing_confirmed_disabled=settings.billing_confirmed_disabled,
-        free_only=settings.free_only,
-        max_cloud_requests_per_day=settings.max_cloud_requests_per_day,
-        max_cloud_input_chars=settings.max_cloud_input_chars,
-        max_cloud_context_messages=settings.max_cloud_context_messages,
     )
 
     def status() -> list[str]:
-        ollama = local.probe()
+        return runtime.status().cli_lines()
-        try:
-            key_available = secrets.gemini_key_available()
-        except SecretStoreError:
-            key_available = False
-        gemini_configured = (
-            settings.gemini_enabled and settings.free_only and settings.billing_confirmed_disabled
-        )
-        try:
-            cloud_requests = usage_store.cloud_requests_on()
-            local_fallbacks = usage_store.local_fallbacks_on()
-        except UsageStoreError:
-            cloud_requests = local_fallbacks = -1
-        return [
-            f"Ollama erreichbar: {'ja' if ollama.reachable else 'nein'}",
-            f"Lokales Modell vorhanden: {'ja' if ollama.model_available else 'nein'}",
-            f"Gemini-Schlüssel vorhanden: {'ja' if key_available else 'nein'}",
-            f"Gemini konfiguriert: {'ja' if gemini_configured else 'nein'}",
-            f"Nullkostenmodus: {'aktiv' if settings.free_only else 'inaktiv'}",
-            f"Aktiver Providermodus: {hybrid.mode}",
-            f"Heutige Cloudanfragen: {cloud_requests if cloud_requests >= 0 else 'unbekannt'}",
-            f"Heutige lokale Fallbacks: {local_fallbacks if local_fallbacks >= 0 else 'unbekannt'}",
-        ]
 
-    return ChatService(store, hybrid), status
+    return runtime.service, status
 
 
 def main(
@@ -484,6 +423,10 @@ def main(
             input_fn=input_fn,
             output=output,
         )
+    if args.command == "gui":
+        from javis.ui.app import run_gui
+
+        return run_gui([])
     if args.command != "chat":
         return 2
 

src/javis/ui/__init__.py

@@ -0,0 +1 @@
+"""PySide6 desktop interface for the existing Javis core."""

src/javis/ui/app.py

@@ -0,0 +1,43 @@
+"""Desktop application entry point."""
+
+from __future__ import annotations
+
+import sys
+from collections.abc import Sequence
+
+from PySide6.QtWidgets import QApplication, QMessageBox
+
+from javis.config.settings import ConfigurationError, Settings
+from javis.core.runtime import build_javis_runtime
+from javis.memory.sqlite_store import SessionStoreError
+from javis.memory.usage_store import UsageStoreError
+from javis.ui.chat_controller import DesktopController
+from javis.ui.main_window import MainWindow
+from javis.ui.workers import ApprovalBridge
+
+
+def run_gui(argv: Sequence[str] | None = None) -> int:
+    application = QApplication.instance() or QApplication(list(argv or []))
+    application.setApplicationName("Javis Desktop")
+    approval_bridge = ApprovalBridge()
+    try:
+        settings = Settings.from_env()
+        runtime = build_javis_runtime(
+            settings,
+            approval_callback=approval_bridge.request,
+            notice_callback=approval_bridge.notice_received.emit,
+        )
+    except (ConfigurationError, SessionStoreError, UsageStoreError) as exc:
+        QMessageBox.critical(None, "Javis konnte nicht starten", str(exc))
+        return 2
+    window = MainWindow(DesktopController(runtime), approval_bridge)
+    window.show()
+    return application.exec()
+
+
+def main() -> int:
+    return run_gui(sys.argv)
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

src/javis/ui/chat_controller.py

@@ -0,0 +1,114 @@
+"""Small non-Qt adapter between desktop widgets and the existing Javis core."""
+
+from __future__ import annotations
+
+import re
+import threading
+from collections.abc import Iterator
+
+from javis.core.runtime import JavisRuntime
+from javis.memory.sqlite_store import ChatSession
+from javis.providers.base import ProviderError
+from javis.ui.models import (
+    DesktopStatus,
+    GenerationState,
+    StreamEvent,
+    StreamEventKind,
+)
+
+_SECRET_PATTERN = re.compile(
+    r"AIza[\w-]{20,}|sk-[\w-]{16,}|-----BEGIN [A-Z ]*PRIVATE KEY-----",
+    re.IGNORECASE,
+)
+
+
+def sanitized_error(error: BaseException) -> str:
+    text = str(error).strip() or "Unbekannter Fehler."
+    return _SECRET_PATTERN.sub("[SECRET MASKIERT]", text)
+
+
+class DesktopController:
+    """Expose core operations without placing business rules in widgets."""
+
+    def __init__(self, runtime: JavisRuntime) -> None:
+        self.runtime = runtime
+        self.service = runtime.service
+        self.active_session_id: str | None = None
+        self.state = GenerationState.READY
+
+    def ensure_session(self) -> ChatSession:
+        if self.active_session_id is None:
+            session = self.service.new_session()
+            self.active_session_id = session.id
+            return session
+        return self.service.load_session(self.active_session_id).session
+
+    def new_session(self) -> ChatSession:
+        session = self.service.new_session()
+        self.active_session_id = session.id
+        return session
+
+    def list_sessions(self, search: str = "") -> list[ChatSession]:
+        return (
+            self.service.search_sessions(search) if search.strip() else self.service.list_sessions()
+        )
+
+    def load_session(self, session_id: str):
+        loaded = self.service.load_session(session_id)
+        self.active_session_id = loaded.session.id
+        return loaded
+
+    def rename_active_session(self, title: str) -> ChatSession:
+        session = self.ensure_session()
+        return self.service.rename_session(session.id, title)
+
+    def set_mode(self, mode: str) -> None:
+        self.runtime.hybrid_provider.set_mode(mode)
+
+    def stream_message(
+        self,
+        text: str,
+        cancel_event: threading.Event,
+    ) -> Iterator[StreamEvent]:
+        session = self.ensure_session()
+        stream = self.service.stream_send(session.id, text)
+        self.state = GenerationState.THINKING
+        yield StreamEvent(StreamEventKind.STATE, state=self.state)
+        started = False
+        try:
+            for chunk in stream:
+                if cancel_event.is_set():
+                    stream.close()
+                    self.state = GenerationState.ABORTED
+                    yield StreamEvent(StreamEventKind.STATE, state=self.state)
+                    return
+                if not started:
+                    started = True
+                    self.state = GenerationState.ANSWERING
+                    yield StreamEvent(StreamEventKind.STATE, state=self.state)
+                yield StreamEvent(StreamEventKind.CHUNK, text=chunk)
+        except ProviderError as exc:
+            self.state = GenerationState.ERROR
+            yield StreamEvent(StreamEventKind.ERROR, text=sanitized_error(exc), state=self.state)
+            return
+        except Exception as exc:
+            self.state = GenerationState.ERROR
+            yield StreamEvent(StreamEventKind.ERROR, text=sanitized_error(exc), state=self.state)
+            return
+        self.state = GenerationState.READY
+        yield StreamEvent(StreamEventKind.FINISHED, state=self.state)
+
+    def status(self) -> DesktopStatus:
+        runtime_status = self.runtime.status()
+        route = self.runtime.hybrid_provider.last_route
+        return DesktopStatus(
+            state=self.state,
+            mode="Lokal" if runtime_status.provider_mode == "local" else "Hybrid/Auto",
+            provider=route.provider if route else "—",
+            ollama_reachable=runtime_status.ollama_reachable,
+            local_model=runtime_status.local_model,
+            privacy_policy=route.privacy_policy.value if route else "—",
+            cloud_requests_today=runtime_status.cloud_requests_today,
+            local_fallback=bool(route and route.fallback),
+            data_dir=runtime_status.data_dir,
+        )

src/javis/ui/main_window.py

@@ -0,0 +1,419 @@
+"""Main PySide6 window for the Javis desktop MVP."""
+
+from __future__ import annotations
+
+from html import escape
+
+from PySide6.QtCore import Qt, QThread, QTimer, Signal
+from PySide6.QtGui import QAction, QCloseEvent, QKeySequence, QShortcut
+from PySide6.QtWidgets import (
+    QComboBox,
+    QFormLayout,
+    QHBoxLayout,
+    QLabel,
+    QLineEdit,
+    QListWidget,
+    QListWidgetItem,
+    QMainWindow,
+    QMenu,
+    QMessageBox,
+    QPushButton,
+    QSplitter,
+    QTextBrowser,
+    QTextEdit,
+    QVBoxLayout,
+    QWidget,
+)
+
+from javis.providers.base import ChatMessage
+from javis.security.privacy import PrivacyDecision
+from javis.ui.chat_controller import DesktopController
+from javis.ui.models import GenerationState, StreamEvent, StreamEventKind
+from javis.ui.workers import ApprovalBridge, StreamWorker
+
+
+class MessageEdit(QTextEdit):
+    send_requested = Signal()
+
+    def keyPressEvent(self, event) -> None:
+        if event.key() in {Qt.Key_Return, Qt.Key_Enter} and not (
+            event.modifiers() & Qt.ShiftModifier
+        ):
+            self.send_requested.emit()
+            event.accept()
+            return
+        super().keyPressEvent(event)
+
+
+class MainWindow(QMainWindow):
+    def __init__(
+        self,
+        controller: DesktopController,
+        approval_bridge: ApprovalBridge,
+    ) -> None:
+        super().__init__()
+        self.controller = controller
+        self.approval_bridge = approval_bridge
+        self._thread: QThread | None = None
+        self._worker: StreamWorker | None = None
+        self._messages: list[ChatMessage] = []
+        self._draft_user = ""
+        self._draft_assistant = ""
+        self._thinking_dots = 0
+        self._build_ui()
+        self._connect_signals()
+        self._apply_style()
+        self._new_session()
+        self._animation = QTimer(self)
+        self._animation.timeout.connect(self._animate_state)
+        self._animation.start(450)
+
+    def _build_ui(self) -> None:
+        self.setWindowTitle("Javis Desktop")
+        self.resize(1360, 820)
+        splitter = QSplitter(Qt.Horizontal)
+        splitter.addWidget(self._build_sidebar())
+        splitter.addWidget(self._build_chat())
+        splitter.addWidget(self._build_status_panel())
+        splitter.setSizes([280, 760, 300])
+        self.setCentralWidget(splitter)
+        self.statusBar().showMessage("Bereit")
+
+        QShortcut(QKeySequence("Ctrl+N"), self, activated=self._new_session)
+        QShortcut(QKeySequence("Ctrl+K"), self, activated=self._focus_search)
+        QShortcut(QKeySequence("Esc"), self, activated=self._stop_generation)
+
+    def _build_sidebar(self) -> QWidget:
+        panel = QWidget()
+        layout = QVBoxLayout(panel)
+        self.new_button = QPushButton("Neue Sitzung")
+        self.search_edit = QLineEdit()
+        self.search_edit.setPlaceholderText("Sitzungen suchen …")
+        self.session_list = QListWidget()
+        self.session_list.setContextMenuPolicy(Qt.CustomContextMenu)
+        layout.addWidget(self.new_button)
+        layout.addWidget(self.search_edit)
+        layout.addWidget(self.session_list, 1)
+        return panel
+
+    def _build_chat(self) -> QWidget:
+        panel = QWidget()
+        layout = QVBoxLayout(panel)
+        self.chat_view = QTextBrowser()
+        self.chat_view.setOpenExternalLinks(False)
+        self.message_edit = MessageEdit()
+        self.message_edit.setPlaceholderText("Nachricht an Javis …")
+        self.message_edit.setMaximumHeight(130)
+        buttons = QHBoxLayout()
+        buttons.addStretch(1)
+        self.stop_button = QPushButton("Stoppen")
+        self.stop_button.setEnabled(False)
+        self.send_button = QPushButton("Senden")
+        buttons.addWidget(self.stop_button)
+        buttons.addWidget(self.send_button)
+        layout.addWidget(self.chat_view, 1)
+        layout.addWidget(self.message_edit)
+        layout.addLayout(buttons)
+        return panel
+
+    def _build_status_panel(self) -> QWidget:
+        panel = QWidget()
+        layout = QVBoxLayout(panel)
+        title = QLabel("SYSTEMSTATUS")
+        title.setObjectName("panelTitle")
+        layout.addWidget(title)
+        self.state_label = QLabel("Bereit")
+        self.state_label.setObjectName("stateLabel")
+        layout.addWidget(self.state_label)
+        self.mode_combo = QComboBox()
+        self.mode_combo.addItem("Hybrid/Auto", "auto")
+        self.mode_combo.addItem("Lokal", "local")
+        form = QFormLayout()
+        form.addRow("Modus", self.mode_combo)
+        self.status_labels: dict[str, QLabel] = {}
+        for key, label in (
+            ("provider", "Provider"),
+            ("ollama", "Ollama erreichbar"),
+            ("model", "Lokales Modell"),
+            ("privacy", "Datenschutz"),
+            ("cloud", "Cloudaufrufe heute"),
+            ("fallback", "Lokales Fallback"),
+            ("data", "Datenverzeichnis"),
+        ):
+            value = QLabel("—")
+            value.setWordWrap(True)
+            self.status_labels[key] = value
+            form.addRow(label, value)
+        layout.addLayout(form)
+        layout.addStretch(1)
+        return panel
+
+    def _connect_signals(self) -> None:
+        self.new_button.clicked.connect(self._new_session)
+        self.search_edit.textChanged.connect(self._refresh_sessions)
+        self.session_list.itemDoubleClicked.connect(self._load_item)
+        self.session_list.customContextMenuRequested.connect(self._session_menu)
+        self.send_button.clicked.connect(self._send)
+        self.stop_button.clicked.connect(self._stop_generation)
+        self.message_edit.send_requested.connect(self._send)
+        self.mode_combo.currentIndexChanged.connect(self._mode_changed)
+        self.approval_bridge.approval_requested.connect(self._show_approval)
+        self.approval_bridge.notice_received.connect(self._show_notice)
+
+    def _apply_style(self) -> None:
+        self.setStyleSheet(
+            """
+            QMainWindow, QWidget { background: #171c21; color: #e8edf2; }
+            QLineEdit, QTextEdit, QTextBrowser, QListWidget, QComboBox {
+                background: #202b35; border: 1px solid #344553;
+                border-radius: 6px; padding: 7px; selection-background-color: #b97828;
+            }
+            QPushButton { background: #2b3945; border: 1px solid #485b69;
+                border-radius: 6px; padding: 8px 14px; }
+            QPushButton:hover { border-color: #d3943f; }
+            QPushButton:disabled { color: #68747d; }
+            #panelTitle { color: #d3943f; font-weight: 700; letter-spacing: 1px; }
+            #stateLabel { background: #24342e; color: #86d49b; padding: 10px;
+                border-radius: 6px; font-weight: 700; }
+            QStatusBar { background: #11161a; color: #b8c2ca; }
+            """
+        )
+
+    def _new_session(self) -> None:
+        if self._worker is not None:
+            return
+        session = self.controller.new_session()
+        self._messages = []
+        self._draft_user = self._draft_assistant = ""
+        self._render_chat()
+        self._refresh_sessions()
+        self.statusBar().showMessage(f"Neue Sitzung: {session.title}", 3000)
+        self.message_edit.setFocus()
+        self._refresh_status()
+
+    def _refresh_sessions(self) -> None:
+        try:
+            sessions = self.controller.list_sessions(self.search_edit.text())
+        except Exception as exc:
+            self._show_error(str(exc))
+            return
+        active = self.controller.active_session_id
+        self.session_list.clear()
+        for session in sessions:
+            item = QListWidgetItem(
+                f"{session.title}\n"
+                f"{session.last_provider} · {session.message_count} Nachrichten · "
+                f"{session.updated_at[:16].replace('T', ' ')}"
+            )
+            item.setData(Qt.UserRole, session.id)
+            self.session_list.addItem(item)
+            if session.id == active:
+                self.session_list.setCurrentItem(item)
+
+    def _load_item(self, item: QListWidgetItem) -> None:
+        if self._worker is not None:
+            return
+        try:
+            loaded = self.controller.load_session(item.data(Qt.UserRole))
+        except Exception as exc:
+            self._show_error(str(exc))
+            return
+        self._messages = list(loaded.messages)
+        self._draft_user = self._draft_assistant = ""
+        self._render_chat()
+        self.statusBar().showMessage(f"Sitzung geladen: {loaded.session.title}", 3000)
+
+    def _session_menu(self, position) -> None:
+        item = self.session_list.itemAt(position)
+        if item is None:
+            return
+        menu = QMenu(self)
+        rename_action = QAction("Umbenennen", menu)
+        rename_action.triggered.connect(lambda: self._rename_item(item))
+        menu.addAction(rename_action)
+        menu.exec(self.session_list.mapToGlobal(position))
+
+    def _rename_item(self, item: QListWidgetItem) -> None:
+        if item.data(Qt.UserRole) != self.controller.active_session_id:
+            self._load_item(item)
+        from PySide6.QtWidgets import QInputDialog
+
+        title, accepted = QInputDialog.getText(self, "Sitzung umbenennen", "Neuer Titel:")
+        if not accepted:
+            return
+        try:
+            self.controller.rename_active_session(title)
+            self._refresh_sessions()
+        except Exception as exc:
+            self._show_error(str(exc))
+
+    def _send(self) -> None:
+        text = self.message_edit.toPlainText().strip()
+        if not text or self._worker is not None:
+            return
+        self.message_edit.clear()
+        self._draft_user = text
+        self._draft_assistant = ""
+        self._render_chat()
+        self._set_generating(True)
+        thread = QThread(self)
+        worker = StreamWorker(self.controller, text)
+        worker.moveToThread(thread)
+        thread.started.connect(worker.run)
+        worker.event_received.connect(self._handle_stream_event)
+        worker.completed.connect(thread.quit)
+        worker.completed.connect(self._generation_complete)
+        thread.finished.connect(worker.deleteLater)
+        thread.finished.connect(thread.deleteLater)
+        self._thread = thread
+        self._worker = worker
+        thread.start()
+
+    def _handle_stream_event(self, event: StreamEvent) -> None:
+        if event.kind is StreamEventKind.CHUNK:
+            self._draft_assistant += event.text
+            self._render_chat()
+        if event.state is not None:
+            self._set_state(event.state)
+        if event.kind is StreamEventKind.ERROR:
+            self._show_error(event.text)
+
+    def _generation_complete(self) -> None:
+        failed = self.controller.state in {
+            GenerationState.ABORTED,
+            GenerationState.ERROR,
+        }
+        self._worker = None
+        self._thread = None
+        self._set_generating(False)
+        try:
+            loaded = self.controller.load_session(self.controller.active_session_id or "")
+            self._messages = list(loaded.messages)
+        except Exception as exc:
+            self._show_error(str(exc))
+        self._draft_user = self._draft_assistant = ""
+        self._render_chat()
+        self._refresh_sessions()
+        self._refresh_status()
+        if failed:
+            self.statusBar().showMessage("Antwort abgebrochen oder fehlgeschlagen.", 5000)
+        else:
+            self.statusBar().showMessage("Antwort vollständig gespeichert.", 3000)
+
+    def _stop_generation(self) -> None:
+        if self._worker is None:
+            return
+        self._worker.request_cancel()
+        self.approval_bridge.cancel_pending()
+        self.statusBar().showMessage("Abbruch angefordert …")
+
+    def _set_generating(self, active: bool) -> None:
+        self.send_button.setEnabled(not active)
+        self.stop_button.setEnabled(active)
+        self.new_button.setEnabled(not active)
+        self.session_list.setEnabled(not active)
+        self.mode_combo.setEnabled(not active)
+
+    def _mode_changed(self) -> None:
+        try:
+            self.controller.set_mode(self.mode_combo.currentData())
+            self._refresh_status()
+        except Exception as exc:
+            self._show_error(str(exc))
+
+    def _show_approval(self, decision: PrivacyDecision) -> None:
+        box = QMessageBox(self)
+        box.setWindowTitle("Cloudfreigabe")
+        box.setIcon(QMessageBox.Question)
+        box.setText(
+            "Diese Anfrage darf nur nach deiner Freigabe an Gemini gesendet werden.\n\n"
+            "Es wird ausschließlich der minimierte notwendige Kontext übertragen."
+        )
+        box.setInformativeText(f"Lokale Einstufung: {decision.reason}")
+        allow = box.addButton("Einmal erlauben", QMessageBox.AcceptRole)
+        local = box.addButton("Lokal beantworten", QMessageBox.RejectRole)
+        box.exec()
+        self.approval_bridge.resolve(box.clickedButton() is allow)
+        if box.clickedButton() is local:
+            self.statusBar().showMessage("Die Anfrage wird lokal beantwortet.", 3000)
+
+    def _show_notice(self, text: str) -> None:
+        self.statusBar().showMessage(text, 5000)
+
+    def _show_error(self, text: str) -> None:
+        QMessageBox.critical(self, "Javis-Fehler", text)
+        self.statusBar().showMessage(f"Fehler: {text}", 5000)
+
+    def _refresh_status(self) -> None:
+        try:
+            status = self.controller.status()
+        except Exception as exc:
+            self._show_error(str(exc))
+            return
+        self._set_state(status.state)
+        self.status_labels["provider"].setText(status.provider)
+        self.status_labels["ollama"].setText("Ja" if status.ollama_reachable else "Nein")
+        self.status_labels["model"].setText(status.local_model)
+        self.status_labels["privacy"].setText(status.privacy_policy)
+        self.status_labels["cloud"].setText(
+            str(status.cloud_requests_today)
+            if status.cloud_requests_today is not None
+            else "Unbekannt"
+        )
+        self.status_labels["fallback"].setText("Ja" if status.local_fallback else "Nein")
+        self.status_labels["data"].setText(status.data_dir)
+
+    def _set_state(self, state: GenerationState) -> None:
+        self.state_label.setText(state.value)
+        colors = {
+            GenerationState.READY: ("#24342e", "#86d49b"),
+            GenerationState.THINKING: ("#3a3020", "#e1a54f"),
+            GenerationState.ANSWERING: ("#3a3020", "#e1a54f"),
+            GenerationState.ABORTED: ("#3a3020", "#e1a54f"),
+            GenerationState.ERROR: ("#3a2424", "#ed7777"),
+            GenerationState.OFFLINE: ("#3a2424", "#ed7777"),
+        }
+        background, foreground = colors[state]
+        self.state_label.setStyleSheet(
+            f"background: {background}; color: {foreground}; padding: 10px; "
+            "border-radius: 6px; font-weight: 700;"
+        )
+
+    def _animate_state(self) -> None:
+        if self.controller.state not in {
+            GenerationState.THINKING,
+            GenerationState.ANSWERING,
+        }:
+            return
+        self._thinking_dots = (self._thinking_dots + 1) % 4
+        self.state_label.setText(f"{self.controller.state.value}{'.' * self._thinking_dots}")
+
+    def _render_chat(self) -> None:
+        blocks: list[str] = []
+        messages = list(self._messages)
+        if self._draft_user:
+            messages.append(ChatMessage("user", self._draft_user))
+        if self._draft_assistant:
+            messages.append(ChatMessage("assistant", self._draft_assistant))
+        for message in messages:
+            label = "Pascal" if message.role == "user" else "Javis"
+            content = message.content if message.role == "assistant" else escape(message.content)
+            blocks.append(f"### {label}\n\n{content}")
+        self.chat_view.setMarkdown("\n\n---\n\n".join(blocks))
+        scrollbar = self.chat_view.verticalScrollBar()
+        scrollbar.setValue(scrollbar.maximum())
+
+    def _focus_search(self) -> None:
+        self.search_edit.setFocus()
+        self.search_edit.selectAll()
+
+    def closeEvent(self, event: QCloseEvent) -> None:
+        self._stop_generation()
+        if self._thread is not None and not self._thread.wait(2500):
+            event.ignore()
+            self.statusBar().showMessage(
+                "Javis beendet die laufende Antwort noch kontrolliert.",
+                3000,
+            )
+            return
+        event.accept()

src/javis/ui/models.py

@@ -0,0 +1,43 @@
+"""UI-facing immutable models without Qt dependencies."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from enum import StrEnum
+
+
+class GenerationState(StrEnum):
+    OFFLINE = "Offline"
+    READY = "Bereit"
+    THINKING = "Denkt"
+    ANSWERING = "Antwortet"
+    ABORTED = "Abgebrochen"
+    ERROR = "Fehler"
+
+
+class StreamEventKind(StrEnum):
+    STATE = "state"
+    CHUNK = "chunk"
+    NOTICE = "notice"
+    ERROR = "error"
+    FINISHED = "finished"
+
+
+@dataclass(frozen=True, slots=True)
+class StreamEvent:
+    kind: StreamEventKind
+    text: str = ""
+    state: GenerationState | None = None
+
+
+@dataclass(frozen=True, slots=True)
+class DesktopStatus:
+    state: GenerationState
+    mode: str
+    provider: str
+    ollama_reachable: bool
+    local_model: str
+    privacy_policy: str
+    cloud_requests_today: int | None
+    local_fallback: bool
+    data_dir: str

src/javis/ui/workers.py

@@ -0,0 +1,68 @@
+"""Qt worker objects for non-blocking model generation and approval."""
+
+from __future__ import annotations
+
+import threading
+
+from PySide6.QtCore import QObject, Signal, Slot
+
+from javis.security.privacy import PrivacyDecision
+from javis.ui.chat_controller import DesktopController
+
+
+class ApprovalBridge(QObject):
+    approval_requested = Signal(object)
+    notice_received = Signal(str)
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._lock = threading.Lock()
+        self._event: threading.Event | None = None
+        self._result = False
+
+    def request(self, decision: PrivacyDecision) -> bool:
+        event = threading.Event()
+        with self._lock:
+            self._event = event
+            self._result = False
+        self.approval_requested.emit(decision)
+        event.wait()
+        with self._lock:
+            result = self._result
+            self._event = None
+        return result
+
+    def resolve(self, allowed: bool) -> None:
+        with self._lock:
+            self._result = allowed
+            event = self._event
+        if event is not None:
+            event.set()
+
+    def cancel_pending(self) -> None:
+        self.resolve(False)
+
+
+class StreamWorker(QObject):
+    event_received = Signal(object)
+    completed = Signal()
+
+    def __init__(self, controller: DesktopController, text: str) -> None:
+        super().__init__()
+        self._controller = controller
+        self._text = text
+        self._cancel_event = threading.Event()
+
+    @Slot()
+    def run(self) -> None:
+        try:
+            for event in self._controller.stream_message(
+                self._text,
+                self._cancel_event,
+            ):
+                self.event_received.emit(event)
+        finally:
+            self.completed.emit()
+
+    def request_cancel(self) -> None:
+        self._cancel_event.set()

tests/unit/test_cli.py

@@ -7,7 +7,12 @@ from types import SimpleNamespace
 from javis.config.settings import Settings
 from javis.core.chat_service import ChatService
 from javis.core.provider_router import HybridProvider
-from javis.interface.cli import build_runtime, run_chat, run_gemini_configuration
+from javis.interface.cli import (
+    build_parser,
+    build_runtime,
+    run_chat,
+    run_gemini_configuration,
+)
 from javis.memory.sqlite_store import SQLiteSessionStore
 from javis.providers.base import ChatMessage
 from javis.security.privacy import CloudPolicy
@@ -62,6 +67,10 @@ class _LazySecrets:
 
 
 class CliTests(unittest.TestCase):
+    def test_parser_recognizes_gui_and_existing_chat(self) -> None:
+        self.assertEqual(build_parser().parse_args(["gui"]).command, "gui")
+        self.assertEqual(build_parser().parse_args(["chat"]).command, "chat")
+
     def test_basic_chat_commands(self) -> None:
         with tempfile.TemporaryDirectory() as directory:
             store = SQLiteSessionStore(Path(directory) / "sessions.sqlite3")

tests/unit/test_desktop_controller.py

@@ -0,0 +1,73 @@
+from __future__ import annotations
+
+import unittest
+from types import SimpleNamespace
+
+from javis.providers.base import ChatMessage
+from javis.ui.chat_controller import DesktopController, sanitized_error
+
+
+class _Service:
+    def __init__(self) -> None:
+        self.sessions = [
+            SimpleNamespace(id="one", title="Eins"),
+            SimpleNamespace(id="two", title="Zwei"),
+        ]
+
+    def new_session(self):
+        return self.sessions[0]
+
+    def list_sessions(self):
+        return self.sessions
+
+    def search_sessions(self, text: str):
+        return [session for session in self.sessions if text in session.title]
+
+    def load_session(self, session_id: str):
+        session = next(item for item in self.sessions if item.id == session_id)
+        return SimpleNamespace(
+            session=session,
+            messages=[ChatMessage("user", "Hallo")],
+        )
+
+    def rename_session(self, session_id: str, title: str):
+        session = next(item for item in self.sessions if item.id == session_id)
+        session.title = title
+        return session
+
+
+class _Hybrid:
+    mode = "auto"
+    last_route = None
+
+    def set_mode(self, mode: str) -> None:
+        self.mode = mode
+
+
+class DesktopControllerTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.runtime = SimpleNamespace(
+            service=_Service(),
+            hybrid_provider=_Hybrid(),
+        )
+        self.controller = DesktopController(self.runtime)
+
+    def test_controller_manages_sessions_without_qt_window(self) -> None:
+        created = self.controller.new_session()
+        listed = self.controller.list_sessions()
+        searched = self.controller.list_sessions("Zwei")
+        loaded = self.controller.load_session("two")
+        renamed = self.controller.rename_active_session("Neu")
+
+        self.assertEqual(created.id, "one")
+        self.assertEqual(len(listed), 2)
+        self.assertEqual([session.id for session in searched], ["two"])
+        self.assertEqual(loaded.messages[0].content, "Hallo")
+        self.assertEqual(renamed.title, "Neu")
+
+    def test_error_sanitizer_masks_key_patterns(self) -> None:
+        secret = "AIza" + "x" * 25
+        result = sanitized_error(RuntimeError(f"Fehler {secret}"))
+
+        self.assertNotIn(secret, result)
+        self.assertIn("MASKIERT", result)

uv.lock

@@ -218,6 +218,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/98/2b/f97f1c193fb855c345d678f5077d6926034db0722df74c8f057020e05a25/charset_normalizer-3.4.9-py3-none-any.whl", hash = "sha256:68e5f26a1ad57ded6d1cfb85331d1c1a195314756471d97758c48498bb4dcdf5", size = 64538, upload-time = "2026-07-07T14:34:56.993Z" },
 ]
 
+[[package]]
+name = "colorama"
+version = "0.4.6"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/d8/53/6f443c9a4a8358a93a6792e2acffb9d9d5cb0a5cfd8802644b7b1c9a02e4/colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44", size = 27697, upload-time = "2022-10-25T02:36:22.414Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/d1/d6/3965ed04c63042e047cb6a3e6ed1a63a35087b6a609aa3a15ed8ac56c221/colorama-0.4.6-py2.py3-none-any.whl", hash = "sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6", size = 25335, upload-time = "2022-10-25T02:36:20.889Z" },
+]
+
 [[package]]
 name = "cryptography"
 version = "49.0.0"
@@ -380,6 +389,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/38/3d/2d244233ac4f76e38533cfcb2991c9eb4c7bf688ae0a036d30725b8faafe/importlib_metadata-9.0.0-py3-none-any.whl", hash = "sha256:2d21d1cc5a017bd0559e36150c21c830ab1dc304dedd1b7ea85d20f45ef3edd7", size = 27789, upload-time = "2026-03-20T06:42:55.665Z" },
 ]
 
+[[package]]
+name = "iniconfig"
+version = "2.3.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/72/34/14ca021ce8e5dfedc35312d08ba8bf51fdd999c576889fc2c24cb97f4f10/iniconfig-2.3.0.tar.gz", hash = "sha256:c76315c77db068650d49c5b56314774a7804df16fee4402c1f19d6d15d8c4730", size = 20503, upload-time = "2025-10-18T21:55:43.219Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/cb/b1/3846dd7f199d53cb17f49cba7e651e9ce294d8497c8c150530ed11865bb8/iniconfig-2.3.0-py3-none-any.whl", hash = "sha256:f631c04d2c48c52b84d0d0549c99ff3859c98df65b3101406327ecc7d53fbf12", size = 7484, upload-time = "2025-10-18T21:55:41.639Z" },
+]
+
 [[package]]
 name = "jaraco-classes"
 version = "3.4.0"
@@ -423,10 +441,12 @@ source = { editable = "." }
 dependencies = [
     { name = "google-genai" },
     { name = "keyring" },
+    { name = "pyside6" },
 ]
 
 [package.dev-dependencies]
 dev = [
+    { name = "pytest" },
     { name = "ruff" },
 ]
 
@@ -434,10 +454,14 @@ dev = [
 requires-dist = [
     { name = "google-genai", specifier = ">=2.6,<3" },
     { name = "keyring", specifier = ">=25.7,<26" },
+    { name = "pyside6", specifier = ">=6.8,<7" },
 ]
 
 [package.metadata.requires-dev]
-dev = [{ name = "ruff", specifier = ">=0.12,<1" }]
+dev = [
+    { name = "pytest", specifier = ">=8,<9" },
+    { name = "ruff", specifier = ">=0.12,<1" },
+]
 
 [[package]]
 name = "jeepney"
@@ -475,6 +499,24 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e8/3d/1087453384dbde46a8c7f9356eead2c58be8a7bf156bca40243377c85715/more_itertools-11.1.0-py3-none-any.whl", hash = "sha256:4b65538ae22f6fed0ce4874efd317463a7489796a0939fa66824dd542125a192", size = 72226, upload-time = "2026-05-22T14:14:28.824Z" },
 ]
 
+[[package]]
+name = "packaging"
+version = "26.2"
+source = { registry = "https://pypi.org/simple" }
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