feat: add file storage settings and uploads

apps/web/src/styles/pages.css

@@ -1812,6 +1812,121 @@
   justify-content: flex-end;
 }
 
+.fileStoragePanel {
+  display: grid;
+  gap: 14px;
+}
+
+.fileStorageToolbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 14px 16px;
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  background: #fff;
+}
+
+.fileStorageSettingsCard {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) minmax(260px, 380px) auto;
+  align-items: center;
+  gap: 14px;
+  padding: 14px 16px;
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  background: #fff;
+}
+
+.fileStorageSettingsCard > div {
+  display: grid;
+  gap: 3px;
+}
+
+.fileStorageSettingsCard > label {
+  min-width: 0;
+}
+
+.fileStorageToolbar > div {
+  display: grid;
+  gap: 3px;
+}
+
+.fileStorageToolbar strong {
+  color: var(--text-normal);
+}
+
+.fileStorageToolbar span,
+.fileStorageSettingsCard span,
+.fileStorageMeta span {
+  color: var(--muted-foreground);
+  font-size: var(--font-size-xs);
+  line-height: 1.45;
+}
+
+.fileStorageGrid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 14px;
+}
+
+.fileStorageCard {
+  display: grid;
+  gap: 12px;
+  padding: 16px;
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  background: #fff;
+}
+
+.fileStorageCard header,
+.fileStorageCard footer {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.fileStorageCard header > div:nth-child(2) {
+  display: grid;
+  min-width: 0;
+  flex: 1;
+  gap: 3px;
+}
+
+.fileStorageCard strong,
+.fileStorageCard header span,
+.fileStorageMeta span {
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.fileStorageMeta {
+  display: grid;
+  gap: 7px;
+}
+
+.fileStorageMeta span {
+  padding: 7px 9px;
+  border: 1px solid var(--border-subtle);
+  border-radius: 8px;
+  background: var(--surface-subtle);
+}
+
+.fileStorageCard footer {
+  justify-content: flex-end;
+}
+
+.fileStorageDialogBody {
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+}
+
+.fileStorageSceneGrid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 10px;
+}
+
 .runtimePolicyDialog {
   width: min(980px, 100%);
 }
@@ -1983,6 +2098,7 @@
   .providerCatalogGrid,
   .baseModelGrid,
   .runtimePolicyGrid,
+  .fileStorageGrid,
   .platformGrid,
   .accessPermissionGrid,
   .platformModelChoices {
@@ -2023,7 +2139,11 @@
   .platformModelRow,
   .platformModelToolbar,
   .runtimePolicyGrid,
+  .fileStorageGrid,
+  .fileStorageSettingsCard,
+  .fileStorageSceneGrid,
   .runtimePolicyFormBody,
+  .fileStorageDialogBody,
   .runtimePolicyRows,
   .runnerActionGrid,
   .accessPermissionGrid,

apps/web/src/styles/playground.css

@@ -63,6 +63,88 @@
   transform: rotate(-8deg);
 }
 
+.composerUpload:disabled {
+  cursor: not-allowed;
+  opacity: 0.58;
+}
+
+.composerUploadSpinner {
+  animation: composer-upload-spin 0.9s linear infinite;
+}
+
+.composerInputStack {
+  display: grid;
+  min-width: 0;
+  gap: 8px;
+}
+
+.composerUploadArea {
+  display: grid;
+  gap: 6px;
+}
+
+.composerUploadList {
+  display: flex;
+  min-width: 0;
+  flex-wrap: wrap;
+  gap: 6px;
+}
+
+.composerUploadChip {
+  display: inline-flex;
+  max-width: min(100%, 320px);
+  min-height: 28px;
+  align-items: center;
+  gap: 6px;
+  padding: 4px 7px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: var(--surface-muted);
+  color: var(--text-normal);
+  font-size: var(--font-size-xs);
+}
+
+.composerUploadChip span {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.composerUploadChip small {
+  flex: 0 0 auto;
+  color: var(--muted-foreground);
+}
+
+.composerUploadChip button {
+  display: grid;
+  width: 18px;
+  height: 18px;
+  place-items: center;
+  border: 0;
+  border-radius: 999px;
+  background: transparent;
+  color: var(--text-soft);
+  padding: 0;
+}
+
+.composerUploadChip button:hover {
+  background: var(--surface);
+  color: var(--text-normal);
+}
+
+.composerUploadMessage {
+  color: var(--muted-foreground);
+  font-size: var(--font-size-xs);
+  line-height: var(--line-height-relaxed);
+}
+
+@keyframes composer-upload-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
 .composerBody .shTextarea {
   min-height: 88px;
   border: 0;