fix(cli): distinguish unavailable permission prompts

[primorLee]

Description

Fixes #13178.

When an ask-tier tool call reaches the CLI without an onToolPermissionRequest callback, the CLI now distinguishes the unavailable interactive prompt from an explicit user rejection.

• represent the missing callback as a dedicated callback_missing denial reason
• surface Interactive permission prompt unavailable instead of Permission denied by user
• preserve the existing user-denial and policy-denial behavior

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Checklist

• I've read the contributing guide
• The relevant docs, if any, have been updated or created
• The relevant tests, if any, have been updated or created

Screen recording or screenshot

Not applicable; this corrects the CLI's permission result and message when no interactive callback is available.

Tests

• npm test -- src/stream/streamChatResponse.permissions.test.ts
• prettier --check src/stream/streamChatResponse.helpers.ts src/stream/streamChatResponse.permissions.test.ts src/stream/toolPermissionResult.ts
• eslint src/stream/streamChatResponse.helpers.ts src/stream/streamChatResponse.permissions.test.ts src/stream/toolPermissionResult.ts

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[primorLee]

I have read the CLA Document and I hereby sign the CLA