improve reasoning toggle tests and refactor model capability checks

public/app/modelCapabilities.js

@@ -1,6 +1,12 @@
 // Conservative allowlist for models supporting the boolean think API.
 // Unknown models remain usable for normal chat.
-export function supportsReasoning(model) {
-    const id = String(typeof model === "string" ? model : model?.model || model?.name || "").toLowerCase().split("/").at(-1);
-    return /^(qwen3|deepseek-r1|deepseek-v3\.1)(:|$)/.test(id);
+const reasoningFamilies = new Set(["qwen3", "deepseek-r1", "deepseek-v3.1"]);
+
+export function getModelFamily(model) {
+    const id = typeof model === "string" ? model : model?.model || model?.name || model?.id || "";
+    return String(id).trim().toLowerCase().split("/").at(-1).split(":")[0];
+}
+
+export function supportsReasoning(model) {
+    return reasoningFamilies.has(getModelFamily(model));
 }

public/app/reasoning.js

@@ -1,4 +1,4 @@
-import {supportsReasoning} from "./modelCapabilities.js";
+import {supportsReasoning} from "./modelCapabilities.js?v=20260921-reasoning-capability";
 
 export function createReasoningToggle(button) {
     let reasoningEnabled = false;

public/chat.html

@@ -358,7 +358,7 @@
 
 <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js" defer></script>
 <script src="https://cdn.jsdelivr.net/npm/dompurify@3.0.6/dist/purify.min.js" defer></script>
-<script type="module" src="/script.js?v=20260909-account-controls"></script>
+<script type="module" src="/script.js?v=20260921-reasoning-capability"></script>
 <script type="module" src="/app/workspaceNavigation.js?v=20260909-account-controls"></script>
 </body>
 </html>

public/script.js

@@ -1,6 +1,6 @@
 import {del, get, post, put, stream} from "./app/api.js?v=20260909-account-controls";
 import {appendSources, createWebSearchToggle} from "./app/webSearch.js";
-import {createReasoningToggle, finishReasoning, updateReasoning} from "./app/reasoning.js";
+import {createReasoningToggle, finishReasoning, updateReasoning} from "./app/reasoning.js?v=20260921-reasoning-capability";
 import {closeChatDrawer, openChatDrawer} from "./app/chatDrawer.js?v=20260909-account-controls";
 import {onboardingPrompts, requestedChatId} from "./app/constants.js?v=20260909-account-controls";
 import {getModelProfile} from "./app/modelProfiles.js?v=20260909-account-controls";