Fix latency: switch to bge-small and bge-reranker-base for CPU optimization

Update Groq Qwen model ID to qwen/qwen3-32b

Switch entirely to qwen-2.5-32b due to DeepSeek-R1 string deprecations

Update DeepSeek-R1 model alias to deepseek-r1-distill-qwen-32b

Update decommissioned DeepSeek-R1 model alias to specdec

Fix ui_gradio LLMService initialization and update README

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feat: add secure admin panel, session store, localStorage tracking