#25 · Add `isTakConfigured()` guard before TAK Service calls

Context

TeamCO crashes (or returns 500) when TAK Service isn't deployed. Per bot-utils convention, gate every tak-client.ts call behind a configuration guard.

Acceptance criteria

• [ ] isTakConfigured() returns false if TAK_SERVICE_URL env is unset
• [ ] All call sites short-circuit with a graceful empty response
• [ ] UI shows "TAK integration not enabled" pill when guard returns false

Technical hints

• Pattern: packages/shared-utils/src/bot-utils/tak.ts already has it for the bot — extract to a generic helper if needed

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