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/usb/models/usb_device.py

@@ -0,0 +1,169 @@
+"""USB device plugin models."""
+
+from datetime import datetime
+from shopdb.extensions import db
+from shopdb.core.models.base import BaseModel, AuditMixin
+
+
+class USBDeviceType(BaseModel):
+    """
+    USB device type classification.
+
+    Examples: Flash Drive, External HDD, External SSD, Card Reader
+    """
+    __tablename__ = 'usbdevicetypes'
+
+    usbdevicetypeid = db.Column(db.Integer, primary_key=True)
+    typename = db.Column(db.String(50), unique=True, nullable=False)
+    description = db.Column(db.Text)
+    icon = db.Column(db.String(50), default='usb', comment='Icon name for UI')
+
+    def __repr__(self):
+        return f"<USBDeviceType {self.typename}>"
+
+
+class USBDevice(BaseModel, AuditMixin):
+    """
+    USB device model.
+
+    Tracks USB storage devices that can be checked out by users.
+    """
+    __tablename__ = 'usbdevices'
+
+    usbdeviceid = db.Column(db.Integer, primary_key=True)
+
+    # Identification
+    serialnumber = db.Column(db.String(100), unique=True, nullable=False)
+    label = db.Column(db.String(100), nullable=True, comment='Human-readable label')
+    assetnumber = db.Column(db.String(50), nullable=True, comment='Optional asset tag')
+
+    # Classification
+    usbdevicetypeid = db.Column(
+        db.Integer,
+        db.ForeignKey('usbdevicetypes.usbdevicetypeid'),
+        nullable=True
+    )
+
+    # Specifications
+    capacitygb = db.Column(db.Integer, nullable=True, comment='Capacity in GB')
+    vendorid = db.Column(db.String(10), nullable=True, comment='USB Vendor ID (hex)')
+    productid = db.Column(db.String(10), nullable=True, comment='USB Product ID (hex)')
+    manufacturer = db.Column(db.String(100), nullable=True)
+    productname = db.Column(db.String(100), nullable=True)
+
+    # Current status
+    ischeckedout = db.Column(db.Boolean, default=False)
+    currentuserid = db.Column(db.String(50), nullable=True, comment='SSO of current user')
+    currentusername = db.Column(db.String(100), nullable=True, comment='Name of current user')
+    currentcheckoutdate = db.Column(db.DateTime, nullable=True)
+
+    # Location
+    storagelocation = db.Column(db.String(200), nullable=True, comment='Where device is stored when not checked out')
+
+    # Notes
+    notes = db.Column(db.Text, nullable=True)
+
+    # Relationships
+    devicetype = db.relationship('USBDeviceType', backref='devices')
+
+    # Indexes
+    __table_args__ = (
+        db.Index('idx_usb_serial', 'serialnumber'),
+        db.Index('idx_usb_checkedout', 'ischeckedout'),
+        db.Index('idx_usb_type', 'usbdevicetypeid'),
+        db.Index('idx_usb_currentuser', 'currentuserid'),
+    )
+
+    def __repr__(self):
+        return f"<USBDevice {self.label or self.serialnumber}>"
+
+    @property
+    def display_name(self):
+        """Get display name (label if set, otherwise serial number)."""
+        return self.label or self.serialnumber
+
+    def to_dict(self):
+        """Convert to dictionary with related data."""
+        result = super().to_dict()
+
+        # Add type info
+        if self.devicetype:
+            result['typename'] = self.devicetype.typename
+            result['typeicon'] = self.devicetype.icon
+
+        # Add computed property
+        result['displayname'] = self.display_name
+
+        return result
+
+
+class USBCheckout(BaseModel):
+    """
+    USB device checkout history.
+
+    Tracks when devices are checked out and returned.
+    """
+    __tablename__ = 'usbcheckouts'
+
+    usbcheckoutid = db.Column(db.Integer, primary_key=True)
+
+    # Device reference
+    usbdeviceid = db.Column(
+        db.Integer,
+        db.ForeignKey('usbdevices.usbdeviceid', ondelete='CASCADE'),
+        nullable=False
+    )
+
+    # User info
+    userid = db.Column(db.String(50), nullable=False, comment='SSO of user')
+    username = db.Column(db.String(100), nullable=True, comment='Name of user')
+
+    # Checkout details
+    checkoutdate = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
+    checkindate = db.Column(db.DateTime, nullable=True)
+    expectedreturndate = db.Column(db.DateTime, nullable=True)
+
+    # Metadata
+    purpose = db.Column(db.String(500), nullable=True, comment='Reason for checkout')
+    notes = db.Column(db.Text, nullable=True)
+    checkedoutby = db.Column(db.String(50), nullable=True, comment='Admin who processed checkout')
+    checkedinby = db.Column(db.String(50), nullable=True, comment='Admin who processed checkin')
+
+    # Relationships
+    device = db.relationship('USBDevice', backref=db.backref('checkouts', lazy='dynamic'))
+
+    # Indexes
+    __table_args__ = (
+        db.Index('idx_usbcheckout_device', 'usbdeviceid'),
+        db.Index('idx_usbcheckout_user', 'userid'),
+        db.Index('idx_usbcheckout_dates', 'checkoutdate', 'checkindate'),
+    )
+
+    def __repr__(self):
+        return f"<USBCheckout device={self.usbdeviceid} user={self.userid}>"
+
+    @property
+    def is_active(self):
+        """Check if this checkout is currently active (not returned)."""
+        return self.checkindate is None
+
+    @property
+    def duration_days(self):
+        """Get duration of checkout in days."""
+        end = self.checkindate or datetime.utcnow()
+        delta = end - self.checkoutdate
+        return delta.days
+
+    def to_dict(self):
+        """Convert to dictionary with computed fields."""
+        result = super().to_dict()
+
+        result['isactivecheckout'] = self.is_active
+        result['durationdays'] = self.duration_days
+
+        # Add device info if loaded
+        if self.device:
+            result['devicelabel'] = self.device.label
+            result['deviceserialnumber'] = self.device.serialnumber
+
+        return result