Add sortable columns and inline search filter

- Implemented sortable table headers with visual indicators (▲▼)
- Click any column to sort ascending/descending
- Sort state persists during auto-refresh
- Added compact inline search filter in toolbar
- Unified search across all columns (Sim Source, Artifacts, Date, Uploaded By)
- Positioned search on right side of toolbar for cleaner layout
- Real-time filtering as you type
- Combined filtering and sorting work seamlessly together

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

static/css/styles.css

@@ -99,6 +99,52 @@ header h1 {
     align-items: center;
 }
 
+.filter-inline {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 8px 12px;
+    background: #0f172a;
+    border-radius: 6px;
+    border: 1px solid #334155;
+    min-width: 250px;
+}
+
+.filter-inline input {
+    flex: 1;
+    padding: 4px 8px;
+    background: transparent;
+    border: none;
+    color: #e2e8f0;
+    font-size: 14px;
+}
+
+.filter-inline input:focus {
+    outline: none;
+}
+
+.filter-inline input::placeholder {
+    color: #64748b;
+}
+
+.btn-clear {
+    background: none;
+    border: none;
+    cursor: pointer;
+    padding: 4px;
+    border-radius: 4px;
+    color: #64748b;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: all 0.3s;
+}
+
+.btn-clear:hover {
+    background: #334155;
+    color: #e2e8f0;
+}
+
 .btn {
     padding: 10px 20px;
     border: none;
@@ -189,6 +235,33 @@ th {
     letter-spacing: 0.5px;
 }
 
+th.sortable {
+    cursor: pointer;
+    user-select: none;
+    transition: color 0.3s;
+}
+
+th.sortable:hover {
+    color: #60a5fa;
+}
+
+.sort-indicator {
+    display: inline-block;
+    margin-left: 5px;
+    font-size: 10px;
+    color: #64748b;
+}
+
+th.sort-asc .sort-indicator::after {
+    content: '▲';
+    color: #60a5fa;
+}
+
+th.sort-desc .sort-indicator::after {
+    content: '▼';
+    color: #60a5fa;
+}
+
 td {
     padding: 16px 12px;
     border-bottom: 1px solid #1e293b;
@@ -469,4 +542,8 @@ code {
     th, td {
         padding: 8px 6px;
     }
+
+    .toolbar {
+        flex-wrap: wrap;
+    }
 }