feat: Implement admin settings UI, enhance admin authentication with password hashing, and add new streaming runtime logic for Claude and OpenAI adapters with extensive compatibility tests.

tests/compat/expected/sse_split_tool_json.json

@@ -0,0 +1,8 @@
+{
+  "parts": [
+    {"text": "{\"", "type": "text"},
+    {"text": "tool_calls\":[{\"name\":\"read_file\",\"input\":{\"path\":\"README.MD\"}}]}", "type": "text"}
+  ],
+  "finished": false,
+  "new_type": "text"
+}