feat(agents): add agent configuration and thinking aliases

src/services/agentModelPicker.ts

@@ -0,0 +1,52 @@
+import type { ModelOption } from './modelService';
+
+const normalized = (value: string) => value.trim().toLocaleLowerCase();
+
+const matchScore = (model: ModelOption, query: string) => {
+  const name = normalized(model.name);
+  const alias = normalized(model.alias ?? '');
+  if (!query) return 10;
+  if (name === query) return 0;
+  if (alias === query) return 1;
+  if (name.startsWith(query)) return 2;
+  if (alias.startsWith(query)) return 3;
+  if (name.includes(query)) return 4;
+  if (alias.includes(query)) return 5;
+  return Number.POSITIVE_INFINITY;
+};
+
+export function filterAgentModels(models: ModelOption[], search: string): ModelOption[] {
+  const query = normalized(search);
+  return models
+    .map((model, index) => ({ model, index, score: matchScore(model, query) }))
+    .filter((item) => Number.isFinite(item.score))
+    .sort((left, right) => (
+      left.score - right.score
+      || left.model.name.localeCompare(right.model.name, undefined, { sensitivity: 'base' })
+      || left.index - right.index
+    ))
+    .map((item) => item.model);
+}
+
+export function hasExactAgentModel(models: ModelOption[], value: string): boolean {
+  const query = normalized(value);
+  if (!query) return false;
+  return models.some((model) => (
+    normalized(model.name) === query || normalized(model.alias ?? '') === query
+  ));
+}
+
+export function agentModelAlias(models: ModelOption[], value: string): string {
+  const query = normalized(value);
+  return models.find((model) => normalized(model.name) === query)?.alias ?? '';
+}
+
+export function findAgentModel(models: ModelOption[], value: string): ModelOption | null {
+  const query = normalized(value);
+  if (!query) return null;
+  return models.find((model) => normalized(model.name) === query) ?? null;
+}
+
+export function resolveAgentModelSelection(models: ModelOption[], previous: string): string {
+  return findAgentModel(models, previous)?.name ?? models[0]?.name.trim() ?? '';
+}