fix: support slash-containing model IDs (#1074)

* fix: support slash-containing model IDs

* fix: parse worktree default model identifiers

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/lib/modelIdentifier.ts

@@ -0,0 +1,20 @@
+export interface ParsedModelIdentifier {
+  providerId: string;
+  modelId: string;
+}
+
+export const parseModelIdentifier = (value: string | undefined): ParsedModelIdentifier | null => {
+  if (!value) {
+    return null;
+  }
+
+  const separatorIndex = value.indexOf('/');
+  if (separatorIndex <= 0 || separatorIndex >= value.length - 1) {
+    return null;
+  }
+
+  return {
+    providerId: value.slice(0, separatorIndex),
+    modelId: value.slice(separatorIndex + 1),
+  };
+};

packages/ui/src/lib/worktreeSessionCreator.ts

@@ -12,6 +12,7 @@ import { useContextStore } from '@/stores/contextStore';
 import { useDirectoryStore } from '@/stores/useDirectoryStore';
 import { checkIsGitRepository, previewGitWorktree } from '@/lib/gitApi';
 import { generateBranchName } from '@/lib/git/branchNameGenerator';
+import { parseModelIdentifier } from '@/lib/modelIdentifier';
 import { getRootBranch } from '@/lib/worktrees/worktreeStatus';
 import { getWorktreeSetupCommands } from '@/lib/openchamberConfig';
 import {
@@ -87,12 +88,12 @@ const applyDefaultAgentAndModelSelection = (sessionId: string, configState = use
       return;
     }
 
-    const parts = settingsDefaultModel.split('/');
-    if (parts.length !== 2) {
+    const parsed = parseModelIdentifier(settingsDefaultModel);
+    if (!parsed) {
       return;
     }
 
-    const [providerId, modelId] = parts;
+    const { providerId, modelId } = parsed;
     const modelMetadata = configState.getModelMetadata(providerId, modelId);
     if (!modelMetadata) {
       return;