Add USB, Notifications, Network plugins and reusable EmployeeSearch component

New Plugins:
- USB plugin: Device checkout/checkin with employee lookup, checkout history
- Notifications plugin: Announcements with types, scheduling, shopfloor display
- Network plugin: Network device management with subnets and VLANs
- Equipment and Computers plugins: Asset type separation

Frontend:
- EmployeeSearch component: Reusable employee lookup with autocomplete
- USB views: List, detail, checkout/checkin modals
- Notifications views: List, form with recognition mode
- Network views: Device list, detail, form
- Calendar view with FullCalendar integration
- Shopfloor and TV dashboard views
- Reports index page
- Map editor for asset positioning
- Light/dark mode fixes for map tooltips

Backend:
- Employee search API with external lookup service
- Collector API for PowerShell data collection
- Reports API endpoints
- Slides API for TV dashboard
- Fixed AppVersion model (removed BaseModel inheritance)
- Added checkout_name column to usbcheckouts table

Styling:
- Unified detail page styles
- Improved pagination (page numbers instead of prev/next)
- Dark/light mode theme improvements

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

plugins/network/models/network_device.py

@@ -0,0 +1,121 @@
+"""Network device plugin models."""
+
+from shopdb.extensions import db
+from shopdb.core.models.base import BaseModel
+
+
+class NetworkDeviceType(BaseModel):
+    """
+    Network device type classification.
+
+    Examples: Switch, Router, Access Point, Camera, IDF, Firewall, etc.
+    """
+    __tablename__ = 'networkdevicetypes'
+
+    networkdevicetypeid = db.Column(db.Integer, primary_key=True)
+    networkdevicetype = db.Column(db.String(100), unique=True, nullable=False)
+    description = db.Column(db.Text)
+    icon = db.Column(db.String(50), comment='Icon name for UI')
+
+    def __repr__(self):
+        return f"<NetworkDeviceType {self.networkdevicetype}>"
+
+
+class NetworkDevice(BaseModel):
+    """
+    Network device-specific extension data.
+
+    Links to core Asset table via assetid.
+    Stores network device-specific fields like hostname, firmware, ports, etc.
+    """
+    __tablename__ = 'networkdevices'
+
+    networkdeviceid = db.Column(db.Integer, primary_key=True)
+
+    # Link to core asset
+    assetid = db.Column(
+        db.Integer,
+        db.ForeignKey('assets.assetid', ondelete='CASCADE'),
+        unique=True,
+        nullable=False,
+        index=True
+    )
+
+    # Network device classification
+    networkdevicetypeid = db.Column(
+        db.Integer,
+        db.ForeignKey('networkdevicetypes.networkdevicetypeid'),
+        nullable=True
+    )
+
+    # Vendor
+    vendorid = db.Column(
+        db.Integer,
+        db.ForeignKey('vendors.vendorid'),
+        nullable=True
+    )
+
+    # Network identity
+    hostname = db.Column(
+        db.String(100),
+        index=True,
+        comment='Network hostname'
+    )
+
+    # Firmware/software version
+    firmwareversion = db.Column(db.String(100), nullable=True)
+
+    # Physical characteristics
+    portcount = db.Column(
+        db.Integer,
+        nullable=True,
+        comment='Number of ports (for switches)'
+    )
+
+    # Features
+    ispoe = db.Column(
+        db.Boolean,
+        default=False,
+        comment='Power over Ethernet capable'
+    )
+    ismanaged = db.Column(
+        db.Boolean,
+        default=False,
+        comment='Managed device (SNMP, web interface, etc.)'
+    )
+
+    # For IDF/closet locations
+    rackunit = db.Column(
+        db.String(20),
+        nullable=True,
+        comment='Rack unit position (e.g., U1, U5)'
+    )
+
+    # Relationships
+    asset = db.relationship(
+        'Asset',
+        backref=db.backref('network_device', uselist=False, lazy='joined')
+    )
+    networkdevicetype = db.relationship('NetworkDeviceType', backref='networkdevices')
+    vendor = db.relationship('Vendor', backref='network_devices')
+
+    __table_args__ = (
+        db.Index('idx_netdev_type', 'networkdevicetypeid'),
+        db.Index('idx_netdev_hostname', 'hostname'),
+        db.Index('idx_netdev_vendor', 'vendorid'),
+    )
+
+    def __repr__(self):
+        return f"<NetworkDevice {self.hostname or self.assetid}>"
+
+    def to_dict(self):
+        """Convert to dictionary with related names."""
+        result = super().to_dict()
+
+        # Add related object names
+        if self.networkdevicetype:
+            result['networkdevicetype_name'] = self.networkdevicetype.networkdevicetype
+        if self.vendor:
+            result['vendor_name'] = self.vendor.vendor
+
+        return result