diff --git a/.husky/pre-commit b/.husky/pre-commit
index 54333a0..f314350 100644
--- a/.husky/pre-commit
+++ b/.husky/pre-commit
@@ -1,18 +1,23 @@
 #!/bin/sh
 
-# Run lint-staged for frontend files (Biome)
-cd app
-npx lint-staged
-cd ..
+# Run lint-staged for frontend files (Biome) only if there are relevant files staged
+STAGED_FRONTEND_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E '^app/.*\.(js|ts|tsx|json)$' || true)
+if [ -n "$STAGED_FRONTEND_FILES" ]; then
+  echo "Running Biome on staged frontend files..."
+  cd app
+  npx lint-staged || exit 1
+  cd ..
+fi
 
 # Run Ruff for Python backend files
-if command -v ruff >/dev/null 2>&1; then
-  # Get staged Python files in api directory
-  STAGED_PY_FILES=$(git diff --cached --name-only --diff-filter=ACM -- '*.py' | grep '^api/')
-  if [ -n "$STAGED_PY_FILES" ]; then
+STAGED_PY_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E '^api/.*\.py$' || true)
+if [ -n "$STAGED_PY_FILES" ]; then
+  if command -v ruff >/dev/null 2>&1; then
     echo "Running Ruff on staged Python files..."
     echo "$STAGED_PY_FILES" | xargs ruff check --fix
     # Re-add fixed files to staging
     echo "$STAGED_PY_FILES" | xargs git add
   fi
 fi
+
+exit 0
diff --git a/README.md b/README.md
index 186afad..f96d9a7 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # PrintQue - 3D Printer Management System
 
+[![Discord](https://img.shields.io/badge/Discord-PrintQue-5865F2?logo=discord&logoColor=white)](https://discord.gg/UhFBCKdq)
+
 PrintQue is a powerful and easy-to-use management system designed for 3D print farms. It provides centralized control, monitoring, and queue management for multiple 3D printers, helping you maximize efficiency and productivity.
 
 ## Quick Start
@@ -258,8 +260,7 @@ Logs are stored in your user directory:
 ### Support
 
 For assistance with PrintQue:
-- **Email**: zhartley@hotmail.ca
-- **Website**: www.printque.ca
+- **Discord**: [Join our community](https://discord.gg/UhFBCKdq)
 
 ## Development
 
diff --git a/api/services/state.py b/api/services/state.py
index ebaaa15..ddf37c0 100644
--- a/api/services/state.py
+++ b/api/services/state.py
@@ -13,7 +13,8 @@
 from flask import current_app
 
 # Set up logging directory
-LOG_DIR = os.path.join(os.path.expanduser("~"), "PrintQueData")
+# Support DATA_DIR environment variable for test isolation
+LOG_DIR = os.path.join(os.getenv('DATA_DIR', os.path.expanduser("~")), "PrintQueData")
 os.makedirs(LOG_DIR, exist_ok=True)
 LOG_FILE = os.path.join(LOG_DIR, "app.log")
 
diff --git a/app/src/__tests__/components/PrinterCard.test.tsx b/app/src/__tests__/components/PrinterCard.test.tsx
index 7e403e0..0596887 100644
--- a/app/src/__tests__/components/PrinterCard.test.tsx
+++ b/app/src/__tests__/components/PrinterCard.test.tsx
@@ -15,6 +15,15 @@ vi.mock('../../hooks', () => ({
   useResumePrint: () => ({ mutate: vi.fn(), isPending: false }),
   useMarkReady: () => ({ mutate: vi.fn(), isPending: false }),
   useClearError: () => ({ mutate: vi.fn(), isPending: false }),
+  useDeletePrinter: () => ({ mutate: vi.fn(), mutateAsync: vi.fn(), isPending: false }),
+}))
+
+// Mock sonner toast
+vi.mock('sonner', () => ({
+  toast: {
+    success: vi.fn(),
+    error: vi.fn(),
+  },
 }))
 
 const createWrapper = () => {
diff --git a/app/src/components/printers/PrinterCard.tsx b/app/src/components/printers/PrinterCard.tsx
index b5f5dd6..d55001f 100644
--- a/app/src/components/printers/PrinterCard.tsx
+++ b/app/src/components/printers/PrinterCard.tsx
@@ -9,6 +9,7 @@ import {
   Square,
   Thermometer,
 } from 'lucide-react'
+import { toast } from 'sonner'
 import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
@@ -19,7 +20,14 @@ import {
   DropdownMenuTrigger,
 } from '@/components/ui/dropdown-menu'
 import { Progress } from '@/components/ui/progress'
-import { useClearError, useMarkReady, usePausePrint, useResumePrint, useStopPrint } from '@/hooks'
+import {
+  useClearError,
+  useDeletePrinter,
+  useMarkReady,
+  usePausePrint,
+  useResumePrint,
+  useStopPrint,
+} from '@/hooks'
 import type { Printer } from '@/types'
 
 interface PrinterCardProps {
@@ -56,12 +64,23 @@ export function PrinterCard({ printer }: PrinterCardProps) {
   const resumePrint = useResumePrint()
   const markReady = useMarkReady()
   const clearError = useClearError()
+  const deletePrinter = useDeletePrinter()
 
   const handleStop = () => stopPrint.mutate(printer.name)
   const handlePause = () => pausePrint.mutate(printer.name)
   const handleResume = () => resumePrint.mutate(printer.name)
   const handleMarkReady = () => markReady.mutate(printer.name)
   const handleClearError = () => clearError.mutate(printer.name)
+  const handleDelete = async () => {
+    if (confirm(`Are you sure you want to delete printer "${printer.name}"?`)) {
+      try {
+        await deletePrinter.mutateAsync(printer.name)
+        toast.success('Printer deleted')
+      } catch (_error) {
+        toast.error('Failed to delete printer')
+      }
+    }
+  }
 
   const isPrinting = printer.status === 'PRINTING'
   const isPaused = printer.status === 'PAUSED'
@@ -237,7 +256,9 @@ export function PrinterCard({ printer }: PrinterCardProps) {
               </DropdownMenuTrigger>
               <DropdownMenuContent align="end">
                 <DropdownMenuItem>Edit</DropdownMenuItem>
-                <DropdownMenuItem className="text-destructive">Delete</DropdownMenuItem>
+                <DropdownMenuItem className="text-destructive" onClick={handleDelete}>
+                  Delete
+                </DropdownMenuItem>
               </DropdownMenuContent>
             </DropdownMenu>
           </div>