spec: remove Intents reference from rationale (#187)

* Update spec: drop Intents reference, rename Notify to Log

- Remove "intent" from the list of MCP-UI message types in the rationale
  section (Intents concept is being dropped)
- Rename "Notify" to "Log" in the lifecycle diagram to better reflect
  that notifications/message is for debugging/telemetry logging, not
  for sending messages to the chat (which is now ui/message)

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* spec: remove Intents reference from rationale

Remove 'intent' from the list of MCP-UI message types - Intents concept was dropped in earlier discussions.

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: ochafik

specification/draft/apps.mdx

@@ -1540,7 +1540,7 @@ This proposal synthesizes feedback from the UI CWG and MCP-UI community, host im
 
 **Alternatives considered:**
 
-- **Custom message protocol:** Current MCP-UI approach with message types like tool, intent, prompt, etc. These message types can be translated to a subset of the proposed JSON-RPC messages.
+- **Custom message protocol:** Current MCP-UI approach with message types like tool, prompt, etc. These message types can be translated to a subset of the proposed JSON-RPC messages.
 - **Global API object:** Rejected because it requires host-specific injection and doesn't work with external iframe sources. Syntactic sugar may still be added on the server/UI side.
 
 #### 3. Support Raw HTML Content Type