反spam: 堵住五个静默绕过 + 新增签到探针层

Tidy: drop vestigial device field + rewrite READMEs for the flagship

Phase 2: 中文黑话词库 + I-Lang v5.0 判定参考 + 修子串误判

Phase 1: 去 Gemini，AI 改走 OpenAI 兼容 provider（默认硅基流动）

v4.3: pre-filter layer — zero API cost spam defense

fix: pass BLOCK_NONE safety_settings on every API call, not just constructor

fix: safe Gemini response extraction + startup logging

v3.0: international edition — universal prompts, English UI, multilingual bot

fix: relax Gemini safety filters — BLOCK_NONE for all categories

v1.0: TelegramGuard - AI-powered group guardian with I-Lang Prompt Spec