Fix PostgreSQL pool size setting for pgBouncer

[DhruvShah-Dev]

Summary

• add a PostgreSQL poolMaxSize built-in driver setting
• use the setting when creating the PostgreSQL connection pool, defaulting to the existing size of 10
• clamp invalid, zero, or oversized values and cover parsing edge cases

Validation

• pnpm.cmd typecheck
• pnpm.cmd lint
• pnpm.cmd exec vitest run tests/utils/driverUI.test.tsx tests/i18n/registryLocale.test.ts
• cargo test postgres_pool_max_size --lib --no-run

Refs #71

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (15 files)

• src-tauri/src/drivers/postgres/mod.rs
• src-tauri/src/pool_manager.rs
• src-tauri/src/pool_manager_tests.rs
• src/hooks/useDrivers.ts
• src/i18n/locales/de.json
• src/i18n/locales/en.json
• src/i18n/locales/es.json
• src/i18n/locales/fr.json
• src/i18n/locales/it.json
• src/i18n/locales/ja.json
• src/i18n/locales/ko.json
• src/i18n/locales/pt-BR.json
• src/i18n/locales/ru.json
• src/i18n/locales/tl.json
• src/i18n/locales/zh.json

The new poolMaxSize PostgreSQL setting mirrors the existing MySQL built-in setting pattern precisely:

• postgres_setting_value / postgres_pool_max_size_from_value in pool_manager.rs reuse the same parsing approach as the MySQL helpers, with correct edge-case handling (zero, negatives, non-numeric strings, oversized values all fall back to the default of 10 or clamp to the 64 cap).
• The pool builder now calls postgres_pool_size() instead of the hard-coded 10.
• The manifest (postgres/mod.rs) and TS fallback (useDrivers.ts) declare the setting consistently, and the default value is sourced from the shared DEFAULT_POSTGRES_POOL_MAX_SIZE constant on the Rust side.
• Tests cover the no-setting, numeric, string, invalid, zero, and oversized cases.
• i18n keys are added at the correct nesting level (pluginSettings.builtin.postgres.poolMaxSize) across all locales, matching the MySQL sibling structure.

No security, runtime, or logic issues identified in the changed lines.

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_{Reviewed by glm-5.2 · Input: 32.2K · Output: 4.4K · Cached: 304.2K}