feat: add dashboard API with quick links and widgets

- Dashboard domain with Quick Links CRUD + reorder endpoints
- Dashboard widgets management endpoints
- Database migrations for quick_links and dashboard_widgets tables
- Static file controller for Organizr widgets
- Default local user when OIDC is disabled
- Domain-based architecture refactor (src/domains/, src/shared/)
- Test suite updated for new structure (285 tests passing)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/domains/dashboard/models.py

@@ -0,0 +1,76 @@
+"""
+Dashboard Domain Models
+
+SQLAlchemy models for dashboard-related data.
+"""
+from datetime import datetime
+from sqlalchemy import Column, Integer, String, Boolean, DateTime, Text, ForeignKey
+from sqlalchemy.orm import relationship
+
+from src.shared.database import Base
+
+
+class QuickLink(Base):
+    """Quick link for dashboard jump pad"""
+    __tablename__ = "quick_links"
+
+    id = Column(Integer, primary_key=True, index=True)
+
+    # Link content
+    title = Column(String(100), nullable=False)
+    url = Column(String(500), nullable=False)
+    icon = Column(String(100), nullable=True)  # Icon name or URL
+    description = Column(String(255), nullable=True)
+
+    # Categorization
+    category = Column(String(50), nullable=True)  # e.g., "services", "tools", "docs"
+
+    # User association - nullable for global links
+    user_id = Column(String(255), nullable=True, index=True)  # Authentik user ID
+
+    # Ordering and display
+    position = Column(Integer, default=0)
+    is_visible = Column(Boolean, default=True)
+
+    # Styling
+    color = Column(String(20), nullable=True)  # Hex color for the link card
+    background_color = Column(String(20), nullable=True)
+
+    # Metadata
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    def __repr__(self):
+        return f"<QuickLink(id={self.id}, title='{self.title}', user_id='{self.user_id}')>"
+
+
+class DashboardWidget(Base):
+    """Dashboard widget configuration"""
+    __tablename__ = "dashboard_widgets"
+
+    id = Column(Integer, primary_key=True, index=True)
+
+    # Widget identification
+    widget_type = Column(String(50), nullable=False)  # e.g., "quick_links", "service_status", "weather"
+
+    # User association - nullable for default widgets
+    user_id = Column(String(255), nullable=True, index=True)
+
+    # Position and sizing
+    position_x = Column(Integer, default=0)
+    position_y = Column(Integer, default=0)
+    width = Column(Integer, default=1)
+    height = Column(Integer, default=1)
+
+    # Widget-specific configuration (JSON)
+    config = Column(Text, nullable=True)  # JSON string for widget-specific settings
+
+    # Display
+    is_visible = Column(Boolean, default=True)
+
+    # Metadata
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    def __repr__(self):
+        return f"<DashboardWidget(id={self.id}, type='{self.widget_type}', user_id='{self.user_id}')>"