westfarn
331cff4730
## Summary - Closes #84. - Same-chat history now defaults on, and existing accounts are switched on. The account toggle stays an opt-out. Follow-ups such as "I don't know, why?" and "put that list in a table" can see the previous turn. - Grounded answers may use the conversation for follow-ups. Citations stay on facts that come from live sources. A pure follow-up skips web search; a follow-up that asks for a price or rating still searches. - Conversation prompts are loaded oldest-first (`created`, then `id`) for the model and for `conversation_details`. The current user turn is dropped from history by matching its text. - Display order of the bubbles is chat_web_app#136. ## Test plan - [ ] `manage.py test chat_backend.tests.test_services_llm chat_backend.tests.test_grounding_search.GroundingPrepassTestCase chat_backend.tests.test_views_conversations chat_backend.tests.test_models.CompanyAndUserTestCase chat_backend.tests.test_migration_graph chat_backend.tests.test_consumers.DatabaseHelperTestCase chat_backend.tests.test_services_rag` - [ ] Apply migration `0036_enable_conversation_context`. - [ ] Ask for a joke, then "I don't know, why?". The reply explains the joke and does not cite an unrelated page. - [ ] Ask for stroller options, then ask for that list in a table with prices and ratings. The table uses the products already named. Missing prices are called out as missing, not the list. - [ ] Turn "Remember this chat" off. The next reply ignores earlier turns. Turn it back on and a follow-up uses them again. - [ ] Reload a multi-turn chat. Bubbles stay oldest at the top. Reviewed-on: #85