refactor(ui): remove unused helper exports

ui/src/ui/chat/attachment-support.ts

@@ -3,10 +3,6 @@ export const CHAT_ATTACHMENT_ACCEPT =
   "image/*,audio/*,application/pdf,text/*,.csv,.json,.md,.txt,.zip," +
   ".doc,.docx,.xls,.xlsx,.ppt,.pptx";
 
-export function isSupportedChatAttachmentMimeType(mimeType: string | null | undefined): boolean {
-  return typeof mimeType === "string" && !mimeType.startsWith("video/");
-}
-
 export function isSupportedChatAttachmentFile(file: Pick<File, "name" | "type">): boolean {
   if (file.type.startsWith("video/")) {
     return false;

ui/src/ui/navigation.ts

@@ -84,24 +84,6 @@ const PATH_ALIASES: Record<string, Tab> = {
   "/dreams": "dreams",
 };
 
-/**
- * Maps a tab to its parent tab when it should render as an indented sub-item
- * under the parent in the sidebar. Sub-items still get their own routes.
- */
-export const TAB_PARENTS: Partial<Record<Tab, Tab>> = {
-  skillWorkshop: "skills",
-};
-
-export function isChildTab(tab: Tab): boolean {
-  return Object.hasOwn(TAB_PARENTS, tab);
-}
-
-export function childTabsOf(parent: Tab): Tab[] {
-  return (Object.entries(TAB_PARENTS) as Array<[Tab, Tab]>)
-    .filter(([, p]) => p === parent)
-    .map(([child]) => child);
-}
-
 const PATH_TO_TAB = new Map<string, Tab>([
   ...Object.entries(TAB_PATHS).map(([tab, path]) => [path, tab as Tab] as const),
   ...Object.entries(PATH_ALIASES),

ui/src/ui/thinking.ts

@@ -9,25 +9,6 @@ export type ThinkingCatalogEntry = {
 
 const BASE_THINKING_LEVELS = ["off", "minimal", "low", "medium", "high"] as const;
 
-export function normalizeThinkingProviderId(provider?: string | null): string {
-  if (!provider) {
-    return "";
-  }
-  const normalized = normalizeLowercaseStringOrEmpty(provider);
-  if (normalized === "z.ai" || normalized === "z-ai") {
-    return "zai";
-  }
-  if (normalized === "bedrock" || normalized === "aws-bedrock") {
-    return "amazon-bedrock";
-  }
-  return normalized;
-}
-
-export function isBinaryThinkingProvider(provider?: string | null): boolean {
-  void provider;
-  return false;
-}
-
 export function normalizeThinkLevel(raw?: string | null): string | undefined {
   if (!raw) {
     return undefined;