v0.7.7

Fixed

• session/prompt final response was missing the accumulated text — handle_acp_prompt previously sent the assistant's final text exclusively through Notification::TextChunk and replied with {"status": "completed"}. Upstream pipelines that consume the final response (or that treat ToolDone("llm_chat","completed") as the turn boundary and stop reading further notifications) saw an empty reply even though the chunks had been streamed. The final response now also carries text: result.text so non-streaming consumers and edge-case race conditions still get the body. Reviewer-flagged by Eren.