Add system memory monitoring, Bedrock support, and Discord integrations

- Add CPU/GPU memory monitoring endpoint and frontend widget
- Add Amazon Bedrock model support (API key / inference profiles) plus model selector entries
- Add Discord weather/laundry notification job (JMA forecast + LLM-generated message)
- Add Discord bot that replies to mentions via the configured LLM, with weather-aware context
- Add scheduled "useless tips" job with separate webhook and quiet-hours skip
- Switch FastAPI startup to lifespan handler, log viewer, markdown rendering, and toast UI additions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/ModelSelector.vue

@@ -4,11 +4,17 @@ import { useChatStore } from '../stores/chat'
 const store = useChatStore()
 
 const presets = [
-  { label: 'GPT-4o', value: 'gpt-4o' },
-  { label: 'GPT-4o mini', value: 'gpt-4o-mini' },
+  { label: 'GPT-5.5', value: 'gpt-5.5' },
+  { label: 'GPT-5.4', value: 'gpt-5.4' },
+  { label: 'GPT-5.4 mini', value: 'gpt-5.4-mini' },
   { label: 'Claude Sonnet 4.6', value: 'claude-sonnet-4-6' },
   { label: 'Claude Haiku 4.5', value: 'claude-haiku-4-5-20251001' },
   { label: 'Ollama llama3', value: 'ollama/llama3' },
+  { label: 'Ollama Gemma4', value: 'ollama/gemma4' },
+  { label: 'Gemma 4 12B (llama-server)', value: 'gpt-3.5-turbo' },
+  { label: 'Claude Sonnet 4.6 (Bedrock)', value: 'bedrock/jp.anthropic.claude-sonnet-4-6' },
+  { label: 'Llama 3 70B (Bedrock)', value: 'bedrock/meta.llama3-70b-instruct-v1:0' },
+  { label: 'Nova 2 Lite (Bedrock)', value: 'bedrock/jp.amazon.nova-2-lite-v1:0' },
 ]
 </script>