Merge branch 'cloudflare:main' into main

Author: mchockal

.changeset/agents-react-lint-fix.md

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+---
+"agents": patch
+---
+
+Export `DurableObjectOAuthClientProvider` from top-level `agents` package and fix `restoreConnectionsFromStorage()` to use the Agent's `createMcpOAuthProvider()` override instead of hardcoding the default provider

.changeset/ai-chat-refactor.md

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+---
+"hono-agents": patch
+---
+
+Fix env type in `hono-agents` middleware

.changeset/auto-continue-default-true.md

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+---
+"agents": patch
+---
+
+Fix: MCP OAuth callback errors are now returned as structured results instead of throwing unhandled exceptions. Errors with an active connection properly transition to "failed" state and are surfaced to clients via WebSocket broadcast.