feat(frontend): update chat composables and vite config

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

frontend/vite.config.ts

@@ -1,10 +1,44 @@
 import { defineConfig, loadEnv } from 'vite'
 import vue from '@vitejs/plugin-vue'
 import path from 'path'
+import fs from 'fs'
 
 export default defineConfig(({ mode }) => {
   const env = loadEnv(mode, __dirname, '')
 
+  function parseDotenvFile(filePath: string) {
+    try {
+      if (!fs.existsSync(filePath)) return {}
+      const text = fs.readFileSync(filePath, 'utf-8')
+      const result: Record<string, string> = {}
+      for (const rawLine of text.split(/\r?\n/)) {
+        const line = rawLine.trim()
+        if (!line || line.startsWith('#')) continue
+        const eq = line.indexOf('=')
+        if (eq <= 0) continue
+        const key = line.slice(0, eq).trim()
+        let value = line.slice(eq + 1).trim()
+        if ((value.startsWith('"') && value.endsWith('"')) || (value.startsWith("'") && value.endsWith("'"))) {
+          value = value.slice(1, -1)
+        }
+        result[key] = value
+      }
+      return result
+    } catch {
+      return {}
+    }
+  }
+
+  // Vite only loads env files under `frontend/` by default.
+  // Many Jarvis setups keep HOST/PORT in repo root `.env`, so we read it explicitly as a fallback.
+  const rootEnvPath = path.resolve(__dirname, '../.env')
+  const rootEnv = parseDotenvFile(rootEnvPath)
+  const rootHost = (rootEnv.HOST || '127.0.0.1').trim()
+  const rootPort = (rootEnv.PORT || '').trim()
+  const rootApi = (rootEnv.VITE_API_URL || (rootPort ? `http://${rootHost}:${rootPort}` : '')).trim()
+
+  const apiTarget = env.VITE_API_URL || rootApi || 'http://localhost:8000'
+
   return {
   plugins: [vue()],
   resolve: {
@@ -15,7 +49,7 @@ export default defineConfig(({ mode }) => {
   server: {
     proxy: {
       '/api': {
-        target: env.VITE_API_URL,
+        target: apiTarget,
         changeOrigin: true,
       },
     },