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/ToastList.vue

@@ -0,0 +1,56 @@
+<script setup lang="ts">
+import { useChatStore } from '../stores/chat'
+
+const store = useChatStore()
+</script>
+
+<template>
+  <div class="toast-list">
+    <div
+      v-for="toast in store.toasts"
+      :key="toast.id"
+      class="toast"
+      @click="store.dismissToast(toast.id)"
+    >
+      <span class="icon">⚠</span>
+      <span class="msg">{{ toast.message }}</span>
+      <button class="close">✕</button>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.toast-list {
+  position: fixed;
+  bottom: 24px;
+  right: 24px;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  z-index: 1000;
+  pointer-events: none;
+}
+.toast {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 10px 14px;
+  background: #1f0a0a;
+  border: 1px solid #7f1d1d;
+  border-radius: 8px;
+  color: #f87171;
+  font-size: 13px;
+  max-width: 360px;
+  cursor: pointer;
+  pointer-events: all;
+  animation: slide-in 0.2s ease;
+  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
+}
+.icon { flex-shrink: 0; }
+.msg { flex: 1; word-break: break-word; }
+.close { background: none; border: none; color: #f87171; cursor: pointer; font-size: 11px; padding: 0; }
+@keyframes slide-in {
+  from { opacity: 0; transform: translateY(8px); }
+  to   { opacity: 1; transform: translateY(0); }
+}
+</style>