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/BaseTextarea.vue

@@ -0,0 +1,62 @@
+<script setup lang="ts">
+import { computed, useAttrs } from 'vue'
+
+defineOptions({ inheritAttrs: false })
+
+const props = withDefaults(
+  defineProps<{
+    modelValue: string
+    placeholder?: string
+    rows?: number
+    maxLength?: number
+    label?: string
+    disabled?: boolean
+  }>(),
+  {
+    placeholder: '',
+    rows: 4,
+    label: '',
+    disabled: false,
+  },
+)
+
+const emit = defineEmits<{ 'update:modelValue': [string] }>()
+const attrs = useAttrs()
+const uid = `textarea-${Math.random().toString(36).slice(2, 9)}`
+
+const textareaId = computed(() => (attrs.id as string) || uid)
+
+const textareaClasses = computed(() => [
+  'input-magic w-full px-4 py-3 rounded-xl text-gray-700 placeholder-gray-400 focus:outline-none resize-none',
+  props.disabled ? 'opacity-60 cursor-not-allowed' : '',
+])
+
+const passthroughAttrs = computed(() => {
+  const { class: _class, id: _id, ...rest } = attrs
+  return rest
+})
+</script>
+
+<template>
+  <div class="space-y-2">
+    <label v-if="props.label" :for="textareaId" class="text-sm font-medium text-gray-700">
+      {{ props.label }}
+    </label>
+    <div class="relative">
+      <textarea
+        :id="textareaId"
+        :rows="props.rows"
+        :placeholder="props.placeholder"
+        :value="props.modelValue"
+        :maxlength="props.maxLength"
+        :disabled="props.disabled"
+        :class="[textareaClasses, attrs.class]"
+        v-bind="passthroughAttrs"
+        @input="emit('update:modelValue', ($event.target as HTMLTextAreaElement).value)"
+      ></textarea>
+      <div v-if="props.maxLength" class="absolute bottom-3 right-4 text-xs text-gray-400">
+        {{ props.modelValue.length }} / {{ props.maxLength }}
+      </div>
+    </div>
+  </div>
+</template>