Fix Discogs API integration with proper authentication

- Updated to use python3-discogs-client==2.8 library
- Added environment variable configuration for API keys
- Implemented proper error handling for missing API credentials
- Added .env file for configuration management
- Enhanced search functionality with graceful fallbacks
- Updated README with Discogs API setup instructions

static/style.css

@@ -0,0 +1,117 @@
+/* Custom styles for Media Inventory App */
+
+body {
+    background-color: #f8f9fa;
+}
+
+.navbar-brand {
+    font-weight: bold;
+    font-size: 1.5rem;
+}
+
+.card {
+    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
+    border: 1px solid rgba(0, 0, 0, 0.125);
+    transition: box-shadow 0.15s ease-in-out;
+}
+
+.card:hover {
+    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
+}
+
+.card-img-top {
+    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
+}
+
+.btn {
+    border-radius: 0.375rem;
+}
+
+.form-control, .form-select {
+    border-radius: 0.375rem;
+}
+
+.alert {
+    border-radius: 0.5rem;
+}
+
+/* Loading animation for search button */
+.btn:disabled {
+    opacity: 0.6;
+}
+
+/* Responsive adjustments */
+@media (max-width: 768px) {
+    .container {
+        padding-left: 15px;
+        padding-right: 15px;
+    }
+    
+    .card-body {
+        padding: 1rem;
+    }
+}
+
+/* Custom media type icons */
+.media-icon {
+    font-size: 1.2em;
+    margin-right: 0.5rem;
+}
+
+/* Results grid improvements */
+.card h5 {
+    font-size: 1.1rem;
+    line-height: 1.3;
+    margin-bottom: 0.75rem;
+}
+
+.card-text {
+    font-size: 0.9rem;
+    line-height: 1.4;
+}
+
+/* Cover image placeholder styling */
+.card-img-top.bg-light {
+    background-color: #f8f9fa !important;
+    border: 2px dashed #dee2e6;
+}
+
+/* Search form enhancements */
+.form-text {
+    font-size: 0.875rem;
+    color: #6c757d;
+}
+
+/* Button hover effects */
+.btn-primary:hover {
+    transform: translateY(-1px);
+    box-shadow: 0 0.25rem 0.5rem rgba(0, 123, 255, 0.25);
+}
+
+.btn-outline-primary:hover {
+    transform: translateY(-1px);
+}
+
+/* Card title truncation for long titles */
+.card-title {
+    display: -webkit-box;
+    -webkit-line-clamp: 2;
+    -webkit-box-orient: vertical;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    min-height: 2.6rem;
+}
+
+/* Ensure cards have equal height */
+.card.h-100 {
+    display: flex;
+    flex-direction: column;
+}
+
+.card-body.d-flex.flex-column {
+    flex: 1;
+}
+
+.mt-auto {
+    margin-top: auto !important;
+}