Initial commit: clean project structure

- Backend: FastAPI + SQLAlchemy + Celery (Python 3.11+)
- Frontend: Vue 3 + TypeScript + Pinia + Tailwind
- Admin Frontend: separate Vue 3 app for management
- Docker Compose: 9 services orchestration
- Specs: design prototypes, memory system PRD, product roadmap

Cleanup performed:
- Removed temporary debug scripts from backend root
- Removed deprecated admin_app.py (embedded UI)
- Removed duplicate docs from admin-frontend
- Updated .gitignore for Vite cache and egg-info

frontend/src/components/ui/BaseSelect.vue

@@ -0,0 +1,67 @@
+<script setup lang="ts">
+import { computed, useAttrs } from 'vue'
+
+defineOptions({ inheritAttrs: false })
+
+type Option = { value: string | number; label: string }
+
+const props = withDefaults(
+  defineProps<{
+    modelValue?: string | number | null
+    options: Option[]
+    label?: string
+    placeholder?: string
+    disabled?: boolean
+  }>(),
+  {
+    label: '',
+    placeholder: '',
+    disabled: false,
+  },
+)
+
+const emit = defineEmits<{ 'update:modelValue': [string | number] }>()
+const attrs = useAttrs()
+const uid = `select-${Math.random().toString(36).slice(2, 9)}`
+
+const selectId = computed(() => (attrs.id as string) || uid)
+
+const selectClasses = computed(() => [
+  'input-magic w-full px-4 py-3 rounded-xl text-gray-700 focus:outline-none',
+  props.disabled ? 'opacity-60 cursor-not-allowed' : '',
+])
+
+const passthroughAttrs = computed(() => {
+  const { class: _class, id: _id, ...rest } = attrs
+  return rest
+})
+
+function handleChange(event: Event) {
+  const value = (event.target as HTMLSelectElement).value
+  const matched = props.options.find(option => String(option.value) === value)
+  emit('update:modelValue', matched ? matched.value : value)
+}
+</script>
+
+<template>
+  <div class="space-y-2">
+    <label v-if="props.label" :for="selectId" class="text-sm font-medium text-gray-700">
+      {{ props.label }}
+    </label>
+    <select
+      :id="selectId"
+      :value="props.modelValue ?? ''"
+      :disabled="props.disabled"
+      :class="[selectClasses, attrs.class]"
+      v-bind="passthroughAttrs"
+      @change="handleChange"
+    >
+      <option v-if="props.placeholder" value="">
+        {{ props.placeholder }}
+      </option>
+      <option v-for="option in props.options" :key="option.value" :value="option.value">
+        {{ option.label }}
+      </option>
+    </select>
+  </div>
+</template>