add Pinia axios and VITE config to frontend.

frontend/src/config/index.ts

@@ -0,0 +1,29 @@
+const env = (key: string): string => {
+    const value = import.meta.env[key];
+    if (value === undefined || value === null) {
+        return '';
+    }
+    return String(value);
+};
+
+const envInt = (key: string, fallback: number): number => {
+    const raw = env(key);
+    if (!raw) {
+        return fallback;
+    }
+    const parsed = parseInt(raw, 10);
+    return Number.isFinite(parsed) ? parsed : fallback;
+};
+
+export const config = {
+    api: {
+        baseUrl: env('VITE_API_BASE_URL')
+    },
+    share: {
+        clearnetDomain: env('VITE_CLEARNET_DOMAIN'),
+        onionHostname: env('VITE_ONION_HOSTNAME')
+    },
+    limits: {
+        maxImagesPerUpload: envInt('VITE_MAX_IMAGES_PER_UPLOAD', 10)
+    }
+};

frontend/src/lib/api.ts

@@ -0,0 +1,10 @@
+import axios from 'axios';
+import { config } from '@/config';
+
+export const api = axios.create({
+    baseURL: config.api.baseUrl,
+    headers: {
+        Accept: 'application/json',
+        'Content-Type': 'application/json'
+    }
+});

frontend/src/main.ts

@@ -1,6 +1,9 @@
 import { createApp } from 'vue';
+import { createPinia } from 'pinia';
 import '@/assets/css/main.css';
 import App from './App.vue';
 import router from './router';
 
-createApp(App).use(router).mount('#app');
+const pinia = createPinia();
+
+createApp(App).use(pinia).use(router).mount('#app');

frontend/src/utils/http/resolveAxiosErrorMessage.ts

@@ -0,0 +1,23 @@
+import axios from 'axios';
+
+export function resolveAxiosErrorMessage(error: unknown, fallback = 'Request failed'): string {
+    if (axios.isAxiosError(error)) {
+        const data = error.response?.data;
+        if (typeof data === 'object' && data !== null && 'message' in data) {
+            const message = (data as { message: unknown }).message;
+            if (typeof message === 'string') {
+                return message;
+            }
+            if (Array.isArray(message)) {
+                return message.map(String).join(', ');
+            }
+        }
+        if (error.message) {
+            return error.message;
+        }
+    }
+    if (error instanceof Error) {
+        return error.message;
+    }
+    return fallback;
+}

frontend/src/vite-env.d.ts

@@ -1 +1,12 @@
 /// <reference types="vite/client" />
+
+interface ImportMetaEnv {
+    readonly VITE_API_BASE_URL: string;
+    readonly VITE_CLEARNET_DOMAIN: string;
+    readonly VITE_ONION_HOSTNAME: string;
+    readonly VITE_MAX_IMAGES_PER_UPLOAD: string;
+}
+
+interface ImportMeta {
+    readonly env: ImportMetaEnv;
+}