feat(KB-081): add provider icons to model selector with custom dropdown
- Create ProviderIcon component with provider-to-icon mappings (OpenAI, Anthropic, Google, etc.) - Build CustomModelDropdown with icon display, filtering, and keyboard navigation - Integrate custom dropdown into ModelSelectorTab replacing native select element - Add CSS styles for provider icons in dropdown items and model badges - Add comprehensive tests for ProviderIcon, CustomModelDropdown, and ModelSelectorTab
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gsxdsm
@@ -1,343 +1,16 @@
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import { useState, useEffect, useCallback, useMemo, useRef } from "react";
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import { useState, useEffect, useCallback } from "react";
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import { fetchModels, updateTask } from "../api";
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import type { ModelInfo } from "../api";
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import type { Task, TaskDetail } from "@kb/core";
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import type { ToastType } from "../hooks/useToast";
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import { filterModels } from "../utils/modelFilter";
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import { CustomModelDropdown } from "./CustomModelDropdown";
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import { ProviderIcon } from "./ProviderIcon";
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interface ModelSelectorTabProps {
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task: Task | TaskDetail;
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addToast: (message: string, type?: ToastType) => void;
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}
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interface ModelComboboxProps {
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value: string; // provider/id combo like "anthropic/claude-sonnet-4-5" or "" for default
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onChange: (value: string) => void;
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models: ModelInfo[];
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disabled?: boolean;
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placeholder?: string;
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label: string;
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id: string;
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}
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/**
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* ModelCombobox - A combobox component combining dropdown and filter input.
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*
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* Interaction pattern:
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* - Closed: Shows trigger button with current selection
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* - Open: Dropdown with search input at top, scrollable list of models grouped by provider
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* - Filtering: Real-time filtering using filterModels() utility
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* - Keyboard: Arrow keys navigate, Enter selects, Escape closes, Tab moves focus
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*/
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function ModelCombobox({
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value,
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onChange,
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models,
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disabled = false,
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placeholder = "Select a model…",
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label,
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id,
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}: ModelComboboxProps) {
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const [isOpen, setIsOpen] = useState(false);
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const [localFilter, setLocalFilter] = useState("");
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const [highlightedIndex, setHighlightedIndex] = useState(0);
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const containerRef = useRef<HTMLDivElement>(null);
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const searchInputRef = useRef<HTMLInputElement>(null);
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const listRef = useRef<HTMLDivElement>(null);
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// Filter models based on local filter text
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const filteredModels = useMemo(() =>
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filterModels(models, localFilter),
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[models, localFilter]
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);
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// Group filtered models by provider
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const modelsByProvider = useMemo(() => {
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return filteredModels.reduce<Record<string, ModelInfo[]>>((acc, m) => {
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(acc[m.provider] ??= []).push(m);
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return acc;
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}, {});
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}, [filteredModels]);
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// Build list of all selectable options (for keyboard navigation)
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const optionsList = useMemo(() => {
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const options: Array<{ type: "default" | "provider" | "model"; value: string; label: string; provider?: string }> = [
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{ type: "default", value: "", label: "Use default" },
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];
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Object.entries(modelsByProvider).forEach(([provider, providerModels]) => {
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options.push({ type: "provider", value: `__group_${provider}`, label: provider, provider });
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providerModels.forEach((m) => {
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options.push({
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type: "model",
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value: `${m.provider}/${m.id}`,
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label: m.name,
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provider: m.provider
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});
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});
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});
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return options;
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}, [modelsByProvider]);
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// Get current selection display text
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const selectedDisplayText = useMemo(() => {
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if (!value) return "Use default";
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const slashIdx = value.indexOf("/");
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if (slashIdx === -1) return value;
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const provider = value.slice(0, slashIdx);
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const modelId = value.slice(slashIdx + 1);
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const model = models.find((m) => m.provider === provider && m.id === modelId);
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return model?.name || value;
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}, [value, models]);
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// Find index of current value in options list
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const currentValueIndex = useMemo(() => {
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return optionsList.findIndex((opt) => opt.value === value);
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}, [optionsList, value]);
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// Reset highlighted index when opening
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useEffect(() => {
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if (isOpen) {
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// Start with current value highlighted, or first selectable option
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const selectableIndex = optionsList.findIndex((opt, idx) =>
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idx >= (currentValueIndex >= 0 ? currentValueIndex : 0) && opt.type !== "provider"
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);
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setHighlightedIndex(selectableIndex >= 0 ? selectableIndex : 0);
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}
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}, [isOpen, optionsList, currentValueIndex]);
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// Focus search input when opening
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useEffect(() => {
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if (isOpen) {
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setTimeout(() => searchInputRef.current?.focus(), 0);
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}
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}, [isOpen]);
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// Click outside to close
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useEffect(() => {
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if (!isOpen) return;
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const handleClickOutside = (e: MouseEvent) => {
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if (containerRef.current && !containerRef.current.contains(e.target as Node)) {
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setIsOpen(false);
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setLocalFilter("");
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}
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};
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document.addEventListener("mousedown", handleClickOutside);
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return () => document.removeEventListener("mousedown", handleClickOutside);
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}, [isOpen]);
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// Keyboard navigation
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const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
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switch (e.key) {
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case "ArrowDown":
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e.preventDefault();
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if (!isOpen) {
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setIsOpen(true);
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} else {
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// Find next selectable option (skip provider headers)
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let nextIndex = highlightedIndex;
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for (let i = 1; i <= optionsList.length; i++) {
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const idx = (highlightedIndex + i) % optionsList.length;
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if (optionsList[idx]?.type !== "provider") {
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nextIndex = idx;
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break;
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}
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}
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setHighlightedIndex(nextIndex);
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}
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break;
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case "ArrowUp":
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e.preventDefault();
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if (isOpen) {
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// Find previous selectable option (skip provider headers)
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let prevIndex = highlightedIndex;
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for (let i = 1; i <= optionsList.length; i++) {
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const idx = (highlightedIndex - i + optionsList.length) % optionsList.length;
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if (optionsList[idx]?.type !== "provider") {
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prevIndex = idx;
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break;
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}
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}
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setHighlightedIndex(prevIndex);
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}
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break;
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case "Enter":
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e.preventDefault();
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if (isOpen) {
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const option = optionsList[highlightedIndex];
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if (option && option.type !== "provider") {
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onChange(option.value);
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setIsOpen(false);
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setLocalFilter("");
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}
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} else {
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setIsOpen(true);
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}
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break;
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case "Escape":
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e.preventDefault();
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setIsOpen(false);
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setLocalFilter("");
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break;
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case "Tab":
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// Close dropdown on tab (focus moves to next field)
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if (isOpen) {
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setIsOpen(false);
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setLocalFilter("");
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}
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break;
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}
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}, [isOpen, highlightedIndex, optionsList, onChange]);
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const handleSelect = useCallback((optionValue: string) => {
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onChange(optionValue);
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setIsOpen(false);
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setLocalFilter("");
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}, [onChange]);
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const handleClearFilter = useCallback(() => {
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setLocalFilter("");
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searchInputRef.current?.focus();
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}, []);
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const handleTriggerClick = useCallback(() => {
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if (!disabled) {
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setIsOpen((prev) => !prev);
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}
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}, [disabled]);
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// Scroll highlighted option into view
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useEffect(() => {
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if (isOpen && listRef.current) {
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const highlightedEl = listRef.current.querySelector(`[data-index="${highlightedIndex}"]`);
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if (highlightedEl && typeof highlightedEl.scrollIntoView === "function") {
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highlightedEl.scrollIntoView({ block: "nearest" });
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}
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}
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}, [highlightedIndex, isOpen]);
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const hasFilter = localFilter.length > 0;
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return (
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<div ref={containerRef} className="model-combobox" onKeyDown={handleKeyDown}>
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{/* Trigger Button */}
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<button
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type="button"
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id={id}
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className="model-combobox-trigger"
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onClick={handleTriggerClick}
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disabled={disabled}
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aria-haspopup="listbox"
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aria-expanded={isOpen}
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aria-label={label}
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>
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<span className="model-combobox-trigger-text">{selectedDisplayText}</span>
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<span className="model-combobox-trigger-arrow">▼</span>
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</button>
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{/* Dropdown Panel */}
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{isOpen && (
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<div className="model-combobox-dropdown" role="listbox">
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{/* Search Input */}
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<div className="model-combobox-search-wrapper">
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<input
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ref={searchInputRef}
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type="text"
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className="model-combobox-search"
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placeholder="Filter models…"
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value={localFilter}
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onChange={(e) => setLocalFilter(e.target.value)}
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onClick={(e) => e.stopPropagation()}
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/>
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{hasFilter && (
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<button
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type="button"
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className="model-combobox-clear"
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onClick={handleClearFilter}
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aria-label="Clear filter"
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>
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×
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</button>
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)}
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</div>
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{/* Results Count */}
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<div className="model-combobox-results-count">
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{filteredModels.length} model{filteredModels.length !== 1 ? "s" : ""}
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</div>
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{/* Options List */}
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<div ref={listRef} className="model-combobox-list">
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{/* Use default option */}
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<div
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data-index={0}
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className={`model-combobox-option ${highlightedIndex === 0 ? "model-combobox-option--highlighted" : ""} ${value === "" ? "model-combobox-option--selected" : ""}`}
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onClick={() => handleSelect("")}
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onMouseEnter={() => setHighlightedIndex(0)}
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role="option"
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aria-selected={value === ""}
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>
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<span className="model-combobox-option-text model-combobox-option-text--default">Use default</span>
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</div>
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{/* Provider groups */}
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{Object.entries(modelsByProvider).map(([provider, providerModels]) => {
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const groupStartIndex = optionsList.findIndex((opt) => opt.value === `__group_${provider}`);
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return (
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<div key={provider} className="model-combobox-group">
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<div
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className="model-combobox-optgroup"
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data-index={groupStartIndex}
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>
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{provider}
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</div>
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{providerModels.map((m) => {
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const optionValue = `${m.provider}/${m.id}`;
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const optionIndex = optionsList.findIndex((opt) => opt.value === optionValue);
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const isHighlighted = highlightedIndex === optionIndex;
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const isSelected = value === optionValue;
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return (
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<div
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key={optionValue}
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data-index={optionIndex}
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className={`model-combobox-option ${isHighlighted ? "model-combobox-option--highlighted" : ""} ${isSelected ? "model-combobox-option--selected" : ""}`}
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onClick={() => handleSelect(optionValue)}
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onMouseEnter={() => setHighlightedIndex(optionIndex)}
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role="option"
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aria-selected={isSelected}
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>
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<span className="model-combobox-option-text">{m.name}</span>
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<span className="model-combobox-option-id">{m.id}</span>
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</div>
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);
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})}
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</div>
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);
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})}
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{/* No results message */}
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{filteredModels.length === 0 && hasFilter && (
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<div className="model-combobox-no-results">
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No models match '{localFilter}'
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</div>
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)}
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</div>
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</div>
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)}
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</div>
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);
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}
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export function ModelSelectorTab({ task, addToast }: ModelSelectorTabProps) {
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const [availableModels, setAvailableModels] = useState<ModelInfo[]>([]);
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const [modelsLoading, setModelsLoading] = useState(false);
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@@ -479,11 +152,12 @@ export function ModelSelectorTab({ task, addToast }: ModelSelectorTabProps) {
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<span className="model-badge model-badge-default">Using default</span>
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) : (
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<span className="model-badge model-badge-custom">
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{task.modelProvider && <ProviderIcon provider={task.modelProvider} size="sm" />}
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{task.modelProvider}/{task.modelId}
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</span>
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)}
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</div>
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<ModelCombobox
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<CustomModelDropdown
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id="executorModel"
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label="Executor Model"
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value={executorValue}
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@@ -503,11 +177,12 @@ export function ModelSelectorTab({ task, addToast }: ModelSelectorTabProps) {
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<span className="model-badge model-badge-default">Using default</span>
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) : (
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<span className="model-badge model-badge-custom">
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{task.validatorModelProvider && <ProviderIcon provider={task.validatorModelProvider} size="sm" />}
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{task.validatorModelProvider}/{task.validatorModelId}
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</span>
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)}
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</div>
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<ModelCombobox
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<CustomModelDropdown
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id="validatorModel"
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label="Validator Model"
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value={validatorValue}
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