feat: implement full breadcrumb path navigation in Files tab

- Add breadcrumbPath array to app state for tracking folder hierarchy
- Rewrite updateBreadcrumb() to render full path: Home > folder > subfolder
- Each breadcrumb segment is clickable to navigate back to that level
- Current folder shown in bold (non-clickable), parent folders as links
- Reset breadcrumb path on tab switch, home navigation, and initial load
- Update navigateFolder/selectFolder to push to breadcrumb path
- Enhanced breadcrumb CSS with hover effects and dark mode support

static/css/components/buttons.css

@@ -0,0 +1,107 @@
+.btn {
+	padding: 12px 24px;
+	border-radius: 12px;
+	border: none;
+	cursor: pointer;
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	font-size: 14px;
+	font-weight: 500;
+	gap: 8px;
+	transition: all 0.2s ease;
+}
+
+.btn i {
+	font-size: 15px;
+}
+
+.btn-primary {
+	background: linear-gradient(135deg, #ff5e3a 0%, #ff2d55 100%);
+	color: white;
+	box-shadow: 0 4px 15px rgba(255, 94, 58, 0.3);
+}
+
+.btn-primary:hover {
+	transform: translateY(-2px);
+	box-shadow: 0 6px 20px rgba(255, 94, 58, 0.4);
+}
+
+.btn-primary:active {
+	transform: translateY(0);
+	box-shadow: 0 2px 10px rgba(255, 94, 58, 0.3);
+}
+
+.btn-secondary {
+	background-color: #f8fafc;
+	color: #4a5568;
+	border: 2px solid #e2e8f0;
+}
+
+.btn-secondary:hover {
+	background-color: #edf2f7;
+	border-color: #cbd5e0;
+	transform: translateY(-2px);
+	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
+}
+
+.btn-secondary:active {
+	transform: translateY(0);
+	background-color: #e2e8f0;
+}
+
+.btn-danger {
+	background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
+	color: white;
+	box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
+}
+
+.btn-danger:hover {
+	transform: translateY(-2px);
+	box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
+}
+
+.btn-danger:active {
+	transform: translateY(0);
+	box-shadow: 0 2px 10px rgba(239, 68, 68, 0.3);
+}
+
+/* View Toggle Buttons */
+.view-toggle {
+	display: flex;
+	gap: 6px;
+	padding: 4px;
+	background-color: #f0f3f7;
+	border-radius: 12px;
+	border: 1px solid #e2e8f0;
+}
+
+.toggle-btn {
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	width: 40px;
+	height: 36px;
+	background-color: transparent;
+	border: none;
+	border-radius: 8px;
+	cursor: pointer;
+	color: #64748b;
+	font-size: 16px;
+	transition: all 0.2s ease;
+}
+
+.toggle-btn:hover {
+	background-color: #e2e8f0;
+	color: #4a5568;
+}
+
+.toggle-btn.active {
+	background-color: white;
+	color: #ff5e3a;
+	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
+}
+
+.toggle-btn i {
+	pointer-events: none;
+}