Add custom fields + warranty plugin, rework settings into two-pane shell

Feature work from the 2026-07 session:

Settings IA
- Replace the flat 27-card settings hub with a persistent two-pane shell
  (SettingsLayout.vue): grouped, searchable left rail + content pane.
- Nest all settings/* routes under the shell via router post-processing;
  shared nav catalog in settingsNav.js. Group by asset class (PCs, Printers,
  Equipment, Network) so per-type settings stop scattering.

Custom fields (core)
- customfields + customfieldvalues tables (migration 7d14), CRUD API at
  /api/customfields, per-asset value get/save.
- Settings management page + reusable CustomFieldsSection (detail) and
  CustomFieldsInputs (form) wired into all four asset types.

Warranty (new plugin)
- plugins/warranty: warranties + warrantyassets (migration 7d15), derived
  coverage status, provider abstraction (manual now; Dell/Lenovo/HP stubs).
- API CRUD + per-asset panel + report buckets; WarrantyPanel on all four
  detail pages; Warranties management page; Warranty report + Reports card.
- Seed warranty.* permissions.

Printer drivers
- printerdrivers table (migration 7d13) linked to printer models; drivers now
  surface on the matching printer's detail page.

Other
- PCDetail rebalanced (Network + Status + Warranty + custom fields on the right).
- Rename PCs list "Features" column to "Remote Access"; fix badge hover underline.
- Drop equipment islocationonly field.
- Centralize asset-type label/route maps into utils/assetTypes.js.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plugins/printers/models/__init__.py

@@ -1,6 +1,7 @@
 """Printers plugin models."""
 
 from .printer import Printer, PrinterType  # Asset-based models
+from .printer_driver import PrinterDriver
 from .model_supply import (  # data-driven model -> toner/drum/waste mapping
     ModelSupply,
     SUPPLY_TYPES,
@@ -11,6 +12,7 @@ from .model_supply import (  # data-driven model -> toner/drum/waste mapping
 __all__ = [
     'Printer',
     'PrinterType',
+    'PrinterDriver',
     'ModelSupply',
     'SUPPLY_TYPES',
     'SUPPLY_COLORS',

plugins/printers/models/printer.py

@@ -15,6 +15,7 @@ class PrinterType(BaseModel):
     printertype = 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')
+    color = db.Column(db.String(20), comment='CSS color for UI/map markers')
 
     def __repr__(self):
         return f"<PrinterType {self.printertype}>"

plugins/printers/models/printer_driver.py

@@ -0,0 +1,33 @@
+"""Printer driver: a named link (SMB path or HTTP URL) to driver files."""
+
+from shopdb.api import db
+
+
+class PrinterDriver(db.Model):
+    __tablename__ = 'printerdrivers'
+
+    driverid = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(150), nullable=False)
+    # SMB path (\\\\server\\share\\...) or HTTP URL to the driver package
+    location = db.Column(db.String(500), nullable=False)
+    description = db.Column(db.Text)
+    # Optional: attach a driver to a specific printer model
+    modelnumberid = db.Column(
+        db.Integer,
+        db.ForeignKey('models.modelnumberid'),
+        nullable=True
+    )
+    isactive = db.Column(db.Boolean, default=True, nullable=False)
+
+    model = db.relationship('Model')
+
+    def to_dict(self):
+        return {
+            'driverid': self.driverid,
+            'name': self.name,
+            'location': self.location,
+            'description': self.description,
+            'modelnumberid': self.modelnumberid,
+            'modelname': self.model.modelnumber if self.model else None,
+            'isactive': bool(self.isactive),
+        }