feat(sqlserver): add Encrypt dropdown to connection dialog

[saurabh500]

Summary

Adds an Encrypt dropdown to the New Connection modal when the driver is SQL Server. Three options: Yes (default), No, Strict.

The backend already accepts the encrypt field on ConnectionParams and maps it correctly in pool.rs::build_config (strict → Required, no → NotSupported, default → On). This PR only adds the missing UI control.

Changes

• src/components/modals/NewConnectionModal.tsx — local interface field, formData seed, driver-change reset, and conditional <Select> rendered for driver === "sqlserver" between the host/port grid and credentials block.
• src/i18n/locales/en.json — newConnection.encrypt label + encryptModes.{yes,no,strict} option labels (mirroring the existing sslModes pattern).

Why draft

The new encrypt value is not yet threaded into the connection save/load path (i.e., the Config mapping where saved connections are reloaded into the dialog). Marking draft until that round-trip is wired so a saved connection re-opens with the previously chosen Encrypt setting.

Manual test

1. Open New Connection → choose SQL Server → confirm the Encrypt dropdown appears between Host/Port and User/Password.
2. Switch driver away from SQL Server → confirm the dropdown disappears and encrypt is reset.
3. Pick Strict → connect to a server requiring TLS → confirms the value reaches the backend (existing build_config test coverage already validates the mapping).

Out of scope

• trust_server_certificate UI control (field exists on the interface, no surface yet).
• Persisting encrypt on saved connections (the "why draft" item above).
• Other locale files; English-only for now, falls back via defaultValue.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (4 files)

• src/components/modals/NewConnectionModal.tsx — Adds encrypt field to local interface, form state, driver-change reset, update-connection delete-guard, and conditional <Select> rendered for driver === "sqlserver". Follows the existing ssl_mode Select pattern.
• src/i18n/locales/en.json — Adds newConnection.encrypt label and encryptModes.{yes,no,strict} translations, mirroring the existing sslModes structure.
• src/utils/connections.ts — Backfills ssl_mode, encrypt, trust_server_certificate, and auth_mode into the shared ConnectionParams interface.
• src/utils/credentials.ts — Adds encrypt, trust_server_certificate, and auth_mode to the credentials-layer ConnectionParams interface.

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_{Reviewed by kimi-k2.6 · 259,128 tokens}

[saurabh500]

This still needs work