fix: support LiteLLM Responses streaming

docs/meeting-assistant-configuration.md

@@ -339,6 +339,7 @@ When enabled on Windows, Meeting Assistant periodically syncs today's Outlook Cl
 | `Key` | Optional inline API key. Prefer `KeyEnv`. |
 | `KeyEnv` | Environment variable name for the agent API key. |
 | `Model` | Model id sent to the endpoint. |
+| `UseStreaming` | Uses the Responses SSE transport when `true` (the default); uses the non-streaming Responses transport when `false`. |
 | `EnableThinking` | Enables reasoning options in requests when supported by the model/backend. |
 | `ReasoningEffort` | Reasoning effort: `None`, `Low`, `Medium`, `High`, or `ExtraHigh`. |
 | `ReconnectionAttempts` | Retry count for transient model endpoint failures. |
@@ -360,9 +361,9 @@ The summary agent can add and remove meeting-note attendees when transcript or O
 
 ## Workflow Rules Editor
 
-`WorkflowRulesEditor` configures the tray-launched `Meeting Summary Agent` window. Blank values inherit from `Agent`, so it uses the summarizer endpoint, key, model, reasoning, retry, output, and compaction settings unless explicitly overridden.
+`WorkflowRulesEditor` configures the tray-launched `Meeting Summary Agent` window. Blank values inherit from `Agent`, so it uses the summarizer endpoint, key, model, Responses transport, reasoning, retry, output, and compaction settings unless explicitly overridden.
 
-The overridable fields are `Endpoint`, `Key`, `KeyEnv`, `Model`, `EnableThinking`, `ReasoningEffort`, `ReconnectionAttempts`, `ReconnectionDelay`, `ContextWindowTokens`, `MaxOutputTokens`, `EnableCompaction`, `CompactionRemainingRatio`, `ResponsesCompactPath`, and `InitialPrompt`.
+The overridable fields are `Endpoint`, `Key`, `KeyEnv`, `Model`, `UseStreaming`, `EnableThinking`, `ReasoningEffort`, `ReconnectionAttempts`, `ReconnectionDelay`, `ContextWindowTokens`, `MaxOutputTokens`, `EnableCompaction`, `CompactionRemainingRatio`, `ResponsesCompactPath`, and `InitialPrompt`.
 
 The assistant can edit workflow rules, manage speaker identities, read and replace the local appsettings file, read this configuration document, search and read copied OpenSpec specs, inspect application logs, create/search/read/write project files, and post-process past meeting artifacts by listing recent summaries and reading, writing, or searching summaries, transcripts, meeting notes, and assistant context files. For artifact metadata repairs, it has frontmatter-specific write tools that preserve the markdown body.
 

docs/meeting-workflow-engine.md

@@ -31,6 +31,7 @@ The tray menu includes `Open agent`, which opens the `Meeting Summary Agent` cha
       "Endpoint": "",
       "KeyEnv": "",
       "Model": "",
+      "UseStreaming": null,
       "EnableThinking": null,
       "ReasoningEffort": null,
       "MaxOutputTokens": null,