feat: add task filtering and search (#16)

public/styles.css

@@ -938,3 +938,65 @@ label {
 .activity-desc {
   flex: 1;
 }
+
+/* Task Controls */
+.task-controls {
+  display: flex;
+  gap: 1rem;
+  margin-bottom: 1.5rem;
+  flex-wrap: wrap;
+}
+
+.task-search {
+  flex: 1;
+  min-width: 200px;
+}
+
+.task-search input {
+  width: 100%;
+  padding: 0.75rem 1rem;
+  background: var(--card-bg);
+  border: 1px solid var(--border-color);
+  border-radius: 8px;
+  color: var(--text-primary);
+  font-size: 0.95rem;
+}
+
+.task-search input:focus {
+  outline: none;
+  border-color: var(--primary);
+}
+
+.task-filters {
+  display: flex;
+  gap: 0.5rem;
+  flex-wrap: wrap;
+}
+
+.task-filters select {
+  padding: 0.75rem 1rem;
+  background: var(--card-bg);
+  border: 1px solid var(--border-color);
+  border-radius: 8px;
+  color: var(--text-primary);
+  cursor: pointer;
+}
+
+.task-filters select:focus {
+  outline: none;
+  border-color: var(--primary);
+}
+
+@media (max-width: 768px) {
+  .task-controls {
+    flex-direction: column;
+  }
+  
+  .task-filters {
+    width: 100%;
+  }
+  
+  .task-filters select {
+    flex: 1;
+  }
+}