fix: ChatBubble crash and DeepSeek API compatibility

- Fix ChatBubble to handle non-string content with String() wrapper
- Fix API route to use generateText for non-streaming requests
- Add @ai-sdk/openai-compatible for non-OpenAI providers (DeepSeek, etc.)
- Use Chat Completions API instead of Responses API for compatible providers
- Update ChatBubble tests and fix component exports to kebab-case
- Remove stale PascalCase ChatBubble.tsx file

_bmad/core/config.yaml

@@ -0,0 +1,9 @@
+# CORE Module Configuration
+# Generated by BMAD installer
+# Version: 6.0.0-alpha.23
+# Date: 2026-01-19T04:24:02.769Z
+
+user_name: Max
+communication_language: English
+document_output_language: English
+output_folder: "{project-root}/_bmad-output"