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/base/forms.css

@@ -0,0 +1,60 @@
+.form-group {
+	margin-bottom: 15px;
+}
+
+.form-group label {
+	display: block;
+	margin-bottom: 8px;
+	font-weight: 500;
+	color: #4a5568;
+}
+
+.form-group input,
+.form-group textarea {
+	width: 100%;
+	padding: 10px;
+	border: 1px solid #e2e8f0;
+	border-radius: 6px;
+	font-size: 14px;
+}
+
+.form-group textarea {
+	resize: vertical;
+	min-height: 80px;
+}
+
+.button {
+	padding: 8px 16px;
+	border: none;
+	border-radius: 6px;
+	cursor: pointer;
+	font-size: 14px;
+	transition: background-color 0.2s;
+}
+
+.primary {
+	background-color: #ff5e3a;
+	color: white;
+}
+
+.primary:hover {
+	background-color: #e64a29;
+}
+
+.secondary {
+	background-color: #e2e8f0;
+	color: #4a5568;
+}
+
+.secondary:hover {
+	background-color: #cbd5e0;
+}
+
+.danger {
+	background-color: #f56565;
+	color: white;
+}
+
+.danger:hover {
+	background-color: #e53e3e;
+}

static/css/base/reset.css

@@ -0,0 +1,22 @@
+* {
+	box-sizing: border-box;
+	margin: 0;
+	padding: 0;
+	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+}
+
+body {
+	display: flex;
+	height: 100vh;
+	background-color: #f5f7fa;
+	overflow: hidden;
+}
+
+html[dir='rtl'] .fa-arrow-left::before {
+	content: "\f061";
+}
+
+html[dir='rtl'] .fa-sign-out-alt {
+	-webkit-transform: rotate(180deg);
+	transform: rotate(180deg);
+}

static/css/base/variables.css

@@ -0,0 +1,9 @@
+:root {
+    --color-bg-page: #f5f7fa;
+    --color-bg-surface: #ffffff;
+    --color-border: #e2e8f0;
+    --color-text: #2d3748;
+    --color-text-muted: #718096;
+    --color-accent: #ff5e3a;
+    --color-accent-hover: #e04520;
+}