The Ollama stream function requested `stream: true` from the API but
accumulated all content chunks internally, emitting only a single `done`
event at the end. This prevented downstream consumers (block streaming
pipeline, typing indicators, draft stream) from receiving incremental
text updates during generation.
Emit the full `start → text_start → text_delta* → text_end → done`
event sequence matching the AssistantMessageEvent contract used by
Anthropic, OpenAI, and Google providers. Each `text_delta` carries both
the incremental `delta` and an accumulated `partial` snapshot.
Tool-call-only responses (no text content) continue to emit only the
`done` event, preserving backward compatibility.
---------
Signed-off-by: Jakub Rusz <jrusz@proton.me>
Co-authored-by: Claude <claude-opus-4-6> <noreply@anthropic.com>
Co-authored-by: Bruce MacDonald <brucewmacdonald@gmail.com>
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