feat: add Client billing fields to store, /clients route, and reorder NavRail

src/stores/clients.ts

@@ -0,0 +1,76 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+import { invoke } from '@tauri-apps/api/core'
+
+export interface Client {
+  id?: number
+  name: string
+  email?: string
+  address?: string
+  company?: string
+  phone?: string
+  tax_id?: string
+  payment_terms?: string
+  notes?: string
+}
+
+export const useClientsStore = defineStore('clients', () => {
+  const clients = ref<Client[]>([])
+  const loading = ref(false)
+
+  async function fetchClients() {
+    loading.value = true
+    try {
+      clients.value = await invoke<Client[]>('get_clients')
+    } catch (error) {
+      console.error('Failed to fetch clients:', error)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function createClient(client: Client): Promise<number | null> {
+    try {
+      const id = await invoke<number>('create_client', { client })
+      clients.value.push({ ...client, id: Number(id) })
+      return Number(id)
+    } catch (error) {
+      console.error('Failed to create client:', error)
+      return null
+    }
+  }
+
+  async function updateClient(client: Client): Promise<boolean> {
+    try {
+      await invoke('update_client', { client })
+      const index = clients.value.findIndex(c => c.id === client.id)
+      if (index !== -1) {
+        clients.value[index] = client
+      }
+      return true
+    } catch (error) {
+      console.error('Failed to update client:', error)
+      return false
+    }
+  }
+
+  async function deleteClient(id: number): Promise<boolean> {
+    try {
+      await invoke('delete_client', { id })
+      clients.value = clients.value.filter(c => c.id !== id)
+      return true
+    } catch (error) {
+      console.error('Failed to delete client:', error)
+      return false
+    }
+  }
+
+  return {
+    clients,
+    loading,
+    fetchClients,
+    createClient,
+    updateClient,
+    deleteClient
+  }
+})