import {  type ProviderInstanceId,  type ProviderDriverKind,  type ResolvedKeybindingsConfig,} from "@t3tools/contracts";import { resolveSelectableModel } from "@t3tools/shared/model";import { LegendList, type LegendListRef } from "@legendapp/list/react";import {  memo,  useMemo,  useState,  useCallback,  useEffect,  useLayoutEffect,  useRef,  type ChangeEvent,  type KeyboardEvent,  type RefObject,} from "react";import { SearchIcon } from "lucide-react";import { ModelListRow } from "./ModelListRow";import { ModelPickerSidebar } from "./ModelPickerSidebar";import { isModelPickerNewModel } from "./modelPickerModelHighlights";import {  buildModelPickerSearchText,  normalizeModelPickerSearchQuery,  scoreModelPickerSearch,} from "./modelPickerSearch";import { Combobox, ComboboxEmpty, ComboboxInput, ComboboxListVirtualized } from "../ui/combobox";import { ModelEsque } from "./providerIconUtils";import {  modelPickerJumpCommandForIndex,  modelPickerJumpIndexFromCommand,  resolveShortcutCommand,  shortcutLabelForCommand,} from "../../keybindings";import { useClientSettings, useUpdateClientSettings } from "~/hooks/useSettings";import { cn } from "~/lib/utils";import { TooltipProvider } from "../ui/tooltip";import {  isProviderInstancePickerReady,  isProviderInstancePickerVisible,  type ProviderInstanceEntry,} from "../../providerInstances";import { providerModelKey, sortProviderModelItems } from "../../modelOrdering"; type ModelPickerItem = {  slug: string;  name: string;  shortName?: string;  subProvider?: string;  instanceId: ProviderInstanceId;  driverKind: ProviderDriverKind;  instanceDisplayName: string;  instanceAccentColor?: string | undefined;  continuationGroupKey?: string | undefined;}; const EMPTY_MODEL_JUMP_LABELS = new Map<string, string>(); const ModelPickerSearchInput = memo(function ModelPickerSearchInput(props: {  inputRef: RefObject<HTMLInputElement | null>;  onNormalizedSearchQueryChange: (query: string) => void;  onRequestClose?: () => void;  onSelectHighlightedModel: () => boolean;}) {  const { inputRef, onNormalizedSearchQueryChange, onRequestClose, onSelectHighlightedModel } =    props;  const [rawSearchQuery, setRawSearchQuery] = useState("");  const publishedSearchQueryRef = useRef(normalizeModelPickerSearchQuery(rawSearchQuery));   const handleSearchChange = useCallback(    (event: ChangeEvent<HTMLInputElement>) => {      const nextRawSearchQuery = event.target.value;      setRawSearchQuery(nextRawSearchQuery);       const nextSearchQuery = normalizeModelPickerSearchQuery(nextRawSearchQuery);      if (nextSearchQuery === publishedSearchQueryRef.current) {        return;      }      publishedSearchQueryRef.current = nextSearchQuery;      onNormalizedSearchQueryChange(nextSearchQuery);    },    [onNormalizedSearchQueryChange],  );   const handleSearchKeyDown = useCallback(    (event: KeyboardEvent<HTMLInputElement>) => {      if (event.key === "Escape") {        event.preventDefault();        event.stopPropagation();        onRequestClose?.();        return;      }      if (event.key === "Enter" && onSelectHighlightedModel()) {        (event as typeof event & { preventBaseUIHandler?: () => void }).preventBaseUIHandler?.();        event.preventDefault();        event.stopPropagation();        return;      }      event.stopPropagation();    },    [onRequestClose, onSelectHighlightedModel],  );   return (    <ComboboxInput      ref={inputRef}      className="[&_input]:h-6.5 [&_input]:font-sans [&_input]:leading-6.5"      inputClassName="rounded-none bg-transparent text-sm"      placeholder="Search models..."      showTrigger={false}      startAddon={        <SearchIcon className="-translate-x-0.5 size-4 shrink-0 text-muted-foreground/55" />      }      value={rawSearchQuery}      onChange={handleSearchChange}      onKeyDown={handleSearchKeyDown}      onMouseDown={(event) => event.stopPropagation()}      onTouchStart={(event) => event.stopPropagation()}      size="sm"      unstyled    />  );}); // Split a `${instanceId}:${slug}` combobox key back into its pieces. Slugs// can contain colons (e.g. some vendor model ids), so we only split on the// first colon — anything after that is the slug.function splitInstanceModelKey(key: string): { instanceId: ProviderInstanceId; slug: string } {  const colonIndex = key.indexOf(":");  if (colonIndex === -1) {    return { instanceId: key as ProviderInstanceId, slug: "" };  }  return {    instanceId: key.slice(0, colonIndex) as ProviderInstanceId,    slug: key.slice(colonIndex + 1),  };} export const ModelPickerContent = memo(function ModelPickerContent(props: {  /** The instance currently selected in the composer (combobox "value"). */  activeInstanceId: ProviderInstanceId;  model: string;  /**   * When set, the picker is locked to the given driver kind — typically   * because the user is editing a previously-sent message and can't change   * which driver served the turn. Multiple instances of the same kind   * remain selectable (e.g. locked to `codex` still lets the user switch   * between the default Codex and a custom Codex Personal).   */  lockedProvider: ProviderDriverKind | null;  lockedContinuationGroupKey?: string | null;  /**   * All configured provider instances in display order. Used to render   * the sidebar (one button per instance) and to resolve display names   * for the locked-mode header.   */  instanceEntries: ReadonlyArray<ProviderInstanceEntry>;  keybindings?: ResolvedKeybindingsConfig;  /**   * Model options per instance. Keyed by `ProviderInstanceId` so the   * default Codex instance and any custom Codex instances each have their   * own list (custom instances typically start with the same built-in   * model set but are free to diverge via customModels).   */  modelOptionsByInstance: ReadonlyMap<ProviderInstanceId, ReadonlyArray<ModelEsque>>;  terminalOpen: boolean;  onRequestClose?: () => void;  getModelDisabledReason?: (instanceId: ProviderInstanceId, model: string) => string | null;  onInstanceModelChange: (instanceId: ProviderInstanceId, model: string) => void;}) {  const {    keybindings: providedKeybindings,    modelOptionsByInstance,    instanceEntries,    getModelDisabledReason,    onInstanceModelChange,  } = props;  const [searchQuery, setSearchQuery] = useState("");  const [showTopScrollFade, setShowTopScrollFade] = useState(false);  const [showBottomScrollFade, setShowBottomScrollFade] = useState(false);  const searchInputRef = useRef<HTMLInputElement>(null);  const modelListRef = useRef<LegendListRef | null>(null);  const highlightedModelKeyRef = useRef<string | null>(null);  const favorites = useClientSettings((s) => s.favorites ?? []);  const [selectedInstanceId, setSelectedInstanceId] = useState<ProviderInstanceId | "favorites">(    () => {      if (props.lockedProvider !== null) {        // When locked, prime the sidebar to the currently-active instance        // so jumping into the picker keeps the focused instance visible.        return props.activeInstanceId;      }      return favorites.length > 0 ? "favorites" : props.activeInstanceId;    },  );  const keybindings = useMemo<ResolvedKeybindingsConfig>(    () => providedKeybindings ?? [],    [providedKeybindings],  );  const updateSettings = useUpdateClientSettings();   const focusSearchInput = useCallback(() => {    searchInputRef.current?.focus({ preventScroll: true });  }, []);   const handleSelectInstance = useCallback(    (instanceId: ProviderInstanceId | "favorites") => {      setSelectedInstanceId(instanceId);      window.requestAnimationFrame(() => {        focusSearchInput();      });    },    [focusSearchInput],  );   useLayoutEffect(() => {    focusSearchInput();    const frame = window.requestAnimationFrame(() => {      focusSearchInput();    });    const timeout = window.setTimeout(() => {      focusSearchInput();    }, 0);    return () => {      window.cancelAnimationFrame(frame);      window.clearTimeout(timeout);    };  }, [focusSearchInput]);   // Create a Set for efficient lookup. Favorites are keyed by  // `${instanceId}:${slug}`; the storage schema widened from ProviderDriverKind  // to ProviderInstanceId so pre-migration favorites keyed by driver slugs  // (e.g. `"codex:gpt-5"`) still resolve — the default instance id equals  // the driver slug.  const favoritesSet = useMemo(() => {    return new Set(favorites.map((fav) => providerModelKey(fav.provider, fav.model)));  }, [favorites]);   /**   * Lookup table keyed by `instanceId`. Used for display name + driver   * kind enrichment and for `ready`/enabled filtering before flattening   * models into the search list.   */  const entryByInstanceId = useMemo(    () => new Map(instanceEntries.map((entry) => [entry.instanceId, entry])),    [instanceEntries],  );  const matchesLockedProvider = useCallback(    (entry: Pick<ProviderInstanceEntry, "driverKind" | "continuationGroupKey">): boolean => {      if (props.lockedProvider === null) return true;      if (entry.driverKind !== props.lockedProvider) return false;      if (!props.lockedContinuationGroupKey) return true;      return entry.continuationGroupKey === props.lockedContinuationGroupKey;    },    [props.lockedContinuationGroupKey, props.lockedProvider],  );   const readyInstanceSet = useMemo(() => {    const ready = new Set<ProviderInstanceId>();    for (const entry of instanceEntries) {      if (isProviderInstancePickerReady(entry)) {        ready.add(entry.instanceId);      }    }    return ready;  }, [instanceEntries]);   // Flatten models into a searchable array. One pass over the  // instance-keyed map; each model carries its instance id + driver kind  // so the list row can render the right icon and display name without  // another lookup.  const flatModels = useMemo(() => {    const out: ModelPickerItem[] = [];    for (const [instanceId, models] of modelOptionsByInstance) {      const entry = entryByInstanceId.get(instanceId);      if (!entry) {        // Instance disappeared between renders (configuration change). Skip        // its models — stale options shouldn't appear in the picker.        continue;      }      if (!readyInstanceSet.has(instanceId)) {        continue;      }      for (const model of models) {        out.push({          slug: model.slug,          name: model.name,          ...(model.shortName ? { shortName: model.shortName } : {}),          ...(model.subProvider ? { subProvider: model.subProvider } : {}),          instanceId,          driverKind: entry.driverKind,          instanceDisplayName: entry.displayName,          ...(entry.accentColor ? { instanceAccentColor: entry.accentColor } : {}),          ...(entry.continuationGroupKey            ? { continuationGroupKey: entry.continuationGroupKey }            : {}),        });      }    }    return out;  }, [modelOptionsByInstance, entryByInstanceId, readyInstanceSet]);   const isLocked = props.lockedProvider !== null;  const isSearching = searchQuery.length > 0;  const lockedDisabledInstanceIds = useMemo(() => {    if (!isLocked) {      return undefined;    }    const disabled = new Set<ProviderInstanceId>();    for (const entry of instanceEntries) {      if (!matchesLockedProvider(entry)) {        disabled.add(entry.instanceId);      }    }    return disabled;  }, [instanceEntries, isLocked, matchesLockedProvider]);  const sidebarInstanceEntries = useMemo(() => {    const enabledEntries = instanceEntries.filter(isProviderInstancePickerVisible);    if (!isLocked) {      return enabledEntries;    }    const available: ProviderInstanceEntry[] = [];    const disabled: ProviderInstanceEntry[] = [];    for (const entry of enabledEntries) {      if (matchesLockedProvider(entry)) {        available.push(entry);      } else {        disabled.push(entry);      }    }    return [...available, ...disabled];  }, [instanceEntries, isLocked, matchesLockedProvider]);  const showSidebar = !isSearching && sidebarInstanceEntries.length > 0;  const instanceOrder = useMemo(    () => instanceEntries.map((entry) => entry.instanceId),    [instanceEntries],  );   // Filter models based on search query and selected instance  const filteredModels = useMemo(() => {    let result = flatModels;     // Apply tokenized fuzzy search across the combined provider/model search fields.    if (searchQuery) {      const rankedMatches = result        .map((model) => ({          model,          score: scoreModelPickerSearch(            {              name: model.name,              ...(model.shortName ? { shortName: model.shortName } : {}),              ...(model.subProvider ? { subProvider: model.subProvider } : {}),              driverKind: model.driverKind,              providerDisplayName: model.instanceDisplayName,              isFavorite: favoritesSet.has(providerModelKey(model.instanceId, model.slug)),            },            searchQuery,          ),          isFavorite: favoritesSet.has(providerModelKey(model.instanceId, model.slug)),          tieBreaker: buildModelPickerSearchText({            name: model.name,            ...(model.shortName ? { shortName: model.shortName } : {}),            ...(model.subProvider ? { subProvider: model.subProvider } : {}),            driverKind: model.driverKind,            providerDisplayName: model.instanceDisplayName,          }),        }))        .filter(          (            rankedModel,          ): rankedModel is {            model: ModelPickerItem;            score: number;            isFavorite: boolean;            tieBreaker: string;          } => rankedModel.score !== null,        );       // When searching, we only respect locked provider (by driver kind),      // ignoring sidebar selection so account-scoped searches can find a      // model before the user chooses a specific instance rail item.      if (props.lockedProvider !== null) {        const lockedProviderMatches: Array<(typeof rankedMatches)[number]> = [];        for (const rankedModel of rankedMatches) {          if (matchesLockedProvider(rankedModel.model)) {            lockedProviderMatches.push(rankedModel);          }        }        return lockedProviderMatches          .toSorted((a, b) => {            const scoreDelta = a.score - b.score;            if (scoreDelta !== 0) {              return scoreDelta;            }            if (a.isFavorite !== b.isFavorite) {              return a.isFavorite ? -1 : 1;            }            return a.tieBreaker.localeCompare(b.tieBreaker);          })          .map((rankedModel) => rankedModel.model);      }       return rankedMatches        .toSorted((a, b) => {          const scoreDelta = a.score - b.score;          if (scoreDelta !== 0) {            return scoreDelta;          }          if (a.isFavorite !== b.isFavorite) {            return a.isFavorite ? -1 : 1;          }          return a.tieBreaker.localeCompare(b.tieBreaker);        })        .map((rankedModel) => rankedModel.model);    }     if (props.lockedProvider !== null) {      result = result.filter((m) => matchesLockedProvider(m));      if (selectedInstanceId === "favorites") {        result = result.filter((m) => favoritesSet.has(providerModelKey(m.instanceId, m.slug)));      } else {        result = result.filter((m) => m.instanceId === selectedInstanceId);      }    } else if (selectedInstanceId === "favorites") {      result = result.filter((m) => favoritesSet.has(providerModelKey(m.instanceId, m.slug)));    } else {      result = result.filter((m) => m.instanceId === selectedInstanceId);    }     return sortProviderModelItems(result, {      favoriteModelKeys: favoritesSet,      groupFavorites: selectedInstanceId !== "favorites",      instanceOrder: selectedInstanceId === "favorites" ? instanceOrder : [],    });  }, [    favoritesSet,    flatModels,    instanceOrder,    matchesLockedProvider,    props.lockedProvider,    searchQuery,    selectedInstanceId,  ]);   const handleModelSelect = useCallback(    (modelSlug: string, instanceId: ProviderInstanceId) => {      if (getModelDisabledReason?.(instanceId, modelSlug)) {        return;      }      const options = modelOptionsByInstance.get(instanceId);      if (!options) {        return;      }      const entry = entryByInstanceId.get(instanceId);      if (!entry) {        return;      }      // `resolveSelectableModel` uses the driver kind for normalization      // (slug casing etc.). Custom instances share their driver's      // normalization rules, so pass the driver kind here.      const resolvedModel = resolveSelectableModel(entry.driverKind, modelSlug, options);      if (resolvedModel) {        onInstanceModelChange(instanceId, resolvedModel);      }    },    [entryByInstanceId, getModelDisabledReason, modelOptionsByInstance, onInstanceModelChange],  );  const selectHighlightedModel = useCallback((): boolean => {    const highlightedModelKey = highlightedModelKeyRef.current;    if (!highlightedModelKey) {      return false;    }    const { instanceId, slug } = splitInstanceModelKey(highlightedModelKey);    handleModelSelect(slug, instanceId);    return true;  }, [handleModelSelect]);   const toggleFavorite = useCallback(    (instanceId: ProviderInstanceId, model: string) => {      const newFavorites = [...favorites];      const index = newFavorites.findIndex((f) => f.provider === instanceId && f.model === model);      if (index >= 0) {        newFavorites.splice(index, 1);      } else {        newFavorites.push({ provider: instanceId, model });      }      updateSettings({ favorites: newFavorites });    },    [favorites, updateSettings],  );   const modelJumpCommandByKey = useMemo(() => {    const mapping = new Map<      string,      NonNullable<ReturnType<typeof modelPickerJumpCommandForIndex>>    >();    let selectableModelIndex = 0;    for (const model of filteredModels) {      if (getModelDisabledReason?.(model.instanceId, model.slug)) {

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