Initial commit: LlamaLink Go rewrite

Complete rewrite from Python/FastAPI to Go/Gin:
- Go backend: auth (API keys + bcrypt), llama.cpp subprocess manager,
  hot-swap multi-model, rate limiting, quota system, webhooks
- Vue 3 SPA admin panel (src/) with Tailwind CSS
- Deployment: Docker multi-stage, docker-compose, nginx, systemd
- GORM/SQLite models: ApiKey, Model, UsageLog, Quota, Webhook
- REST API: /api/v1/admin/* (keys, models, chat, usage, health)
- Embedded frontend via go:embed (build output at web/dist/)

Removed legacy Python artifacts (app/, tests/, pyproject.toml, etc.)

web/frontend/src/stores/auth.ts

@@ -0,0 +1,43 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import { api } from '@/lib/api'
+
+export const useAuthStore = defineStore('auth', () => {
+  const token = ref<string | null>(localStorage.getItem('admin_token'))
+  const loading = ref(false)
+  const error = ref<string | null>(null)
+
+  const isAuthenticated = computed(() => !!token.value)
+
+  async function login(adminToken: string) {
+    loading.value = true
+    error.value = null
+
+    try {
+      const response = await api.post('/api/v1/admin/login', { admin_token: adminToken })
+      token.value = response.data.token
+      localStorage.setItem('admin_token', response.data.token)
+      api.defaults.headers.common['Authorization'] = `Bearer ${response.data.token}`
+      return true
+    } catch (err: any) {
+      error.value = err.response?.data?.error?.message || 'Login failed'
+      return false
+    } finally {
+      loading.value = false
+    }
+  }
+
+  function logout() {
+    token.value = null
+    localStorage.removeItem('admin_token')
+    delete api.defaults.headers.common['Authorization']
+  }
+
+  function init() {
+    if (token.value) {
+      api.defaults.headers.common['Authorization'] = `Bearer ${token.value}`
+    }
+  }
+
+  return { token, loading, error, isAuthenticated, login, logout, init }
+})