i18n complete: all 16 components translated (CZ/HE/RU/UA)

- Custom i18n provider with React Context + localStorage
- Hebrew RTL support (dir=rtl on html)
- All pages + components use t() calls
- FullCalendar + dates locale-aware
- Language selector in Settings wired to context

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ecosystem.config.js

@@ -14,7 +14,8 @@ module.exports = {
         JWT_SECRET: "taskteam-jwt-secret-2026-secure-key",
         ANTHROPIC_API_KEY: "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",
         NOTION_API_KEY: "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",
-        NOTION_TASKS_DB: "659a5381-564a-453a-9e2b-1345c457cca9"
+        NOTION_TASKS_DB: "659a5381-564a-453a-9e2b-1345c457cca9",
+        DEPLOY_SECRET: "taskteam-deploy-2026",
       },
       max_memory_restart: "500M",
       watch: false,