feat: add hidden files configuration with per-vault settings for includeHidden and hiddenWhitelist, supporting environment variables and UI controls for selective indexing of dot-prefixed files and folders

frontend/style.css

@@ -3408,6 +3408,99 @@ body.resizing-v {
   background: #22c55e;
 }
 
+/* ---------------------------------------------------------------------------
+   Hidden Files Configuration
+   --------------------------------------------------------------------------- */
+.hidden-files-vault-card {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 16px;
+  margin-bottom: 16px;
+}
+
+.hidden-files-vault-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 16px;
+  padding-bottom: 12px;
+  border-bottom: 1px solid var(--border);
+}
+
+.hidden-files-vault-header h3 {
+  font-size: 1rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin: 0;
+}
+
+.hidden-files-vault-type {
+  font-size: 0.75rem;
+  padding: 2px 8px;
+  background: var(--tag-bg);
+  color: var(--tag-text);
+  border-radius: 4px;
+  font-family: var(--mono);
+}
+
+.hidden-files-whitelist {
+  margin-top: 16px;
+  padding-top: 16px;
+  border-top: 1px solid var(--border);
+}
+
+.hidden-files-whitelist-items {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  margin-bottom: 12px;
+  min-height: 32px;
+}
+
+.hidden-files-whitelist-item {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 4px 8px 4px 12px;
+  background: var(--tag-bg);
+  color: var(--tag-text);
+  border-radius: 6px;
+  font-size: 0.875rem;
+  font-family: var(--mono);
+  border: 1px solid color-mix(in srgb, var(--tag-text) 30%, transparent);
+}
+
+.whitelist-item-text {
+  user-select: none;
+}
+
+.whitelist-item-remove {
+  background: none;
+  border: none;
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 1.2rem;
+  line-height: 1;
+  padding: 0 4px;
+  transition: color 150ms ease;
+}
+
+.whitelist-item-remove:hover {
+  color: var(--danger);
+}
+
+.hidden-files-add-row {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+}
+
+.hidden-files-add-row .config-input {
+  flex: 1;
+  max-width: 300px;
+}
+
 /* ---------------------------------------------------------------------------
    Utility — hidden class
    --------------------------------------------------------------------------- */