feat: Upgrade Claude adapter to ACP SDK v0.22.2

[charlesvien]

Problem

Claude adapter was on SDK v0.21.0 (ACP 0.15.0, agent-sdk 0.2.71)

Changes

1. Bump @agentclientprotocol/sdk to 0.16.1 and @anthropic-ai/claude-agent-sdk to 0.2.76
2. Add SessionConfigOption union type (select + boolean) and guard all config access with type narrowing
3. Add session reuse via getExistingSessionState for resume/load flows
4. Add local-only command handling (/context, /heapdump, /extra-usage) and prompt replay tracking
5. Add model alias resolution (resolveModelPreference) for human-friendly model names
6. Add "bypass all permissions" option to ExitPlanMode and additionalRoots support
7. Clean up permission handler interrupt flags and remove /context special-case hack in sdk-to-acp

How did you test this?

Manually

[charlesvien]

• fix: Fix context window size and redesign usage indicator #1328
• feat: Upgrade Claude adapter to ACP SDK v0.22.2 #1330 👈 (View in Graphite)
• main

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[charlesvien]

Merge activity

• Mar 25, 5:48 PM UTC: A user started a stack merge that includes this pull request via Graphite.
• Mar 25, 5:48 PM UTC: @charlesvien merged this pull request with Graphite.