diff --git a/electron/main.ts b/electron/main.ts
index ba5ed4d..9afcbd0 100644
--- a/electron/main.ts
+++ b/electron/main.ts
@@ -5,6 +5,25 @@ import fs from 'fs';
 import net from 'net';
 import os from 'os';
 
+/**
+ * Return a copy of process.env without __NEXT_PRIVATE_* variables.
+ *
+ * The bundled Next.js standalone server sets these at runtime
+ * (e.g. __NEXT_PRIVATE_STANDALONE_CONFIG, __NEXT_PRIVATE_ORIGIN).
+ * If they leak into child-process environments they cause every
+ * other Next.js project on the machine to skip its own config
+ * loading, breaking builds and dev servers.
+ */
+function sanitizedProcessEnv(): Record<string, string> {
+  const env: Record<string, string> = {};
+  for (const [key, value] of Object.entries(process.env)) {
+    if (!key.startsWith('__NEXT_PRIVATE_') && value !== undefined) {
+      env[key] = value;
+    }
+  }
+  return env;
+}
+
 let mainWindow: BrowserWindow | null = null;
 let serverProcess: Electron.UtilityProcess | null = null;
 let serverPort: number | null = null;
@@ -388,7 +407,7 @@ function startServer(port: number): Electron.UtilityProcess {
 
   const env: Record<string, string> = {
     ...userShellEnv,
-    ...(process.env as Record<string, string>),
+    ...sanitizedProcessEnv(),
     // Ensure user shell env vars override (especially API keys)
     ...userShellEnv,
     PORT: String(port),
@@ -551,7 +570,7 @@ app.whenReady().then(async () => {
 
   ipcMain.handle('install:check-prerequisites', async () => {
     const expandedPath = getExpandedShellPath();
-    const execEnv = { ...process.env, ...userShellEnv, PATH: expandedPath };
+    const execEnv = { ...sanitizedProcessEnv(), ...userShellEnv, PATH: expandedPath };
     const execOpts = { timeout: 5000, encoding: 'utf-8' as const, env: execEnv };
 
     let hasNode = false;
@@ -615,7 +634,7 @@ app.whenReady().then(async () => {
     const expandedPath = getExpandedShellPath();
     const execEnv: Record<string, string> = {
       ...userShellEnv,
-      ...(process.env as Record<string, string>),
+      ...sanitizedProcessEnv(),
       ...userShellEnv,
       PATH: expandedPath,
     };
diff --git a/src/lib/bridge/conversation-engine.ts b/src/lib/bridge/conversation-engine.ts
index c213fd5..e097988 100644
--- a/src/lib/bridge/conversation-engine.ts
+++ b/src/lib/bridge/conversation-engine.ts
@@ -363,7 +363,7 @@ async function consumeStream(
         : contentBlocks
             .filter((b): b is Extract<MessageContentBlock, { type: 'text' }> => b.type === 'text')
             .map((b) => b.text)
-            .join('')
+            .join('\n\n')
             .trim();
 
       if (content) {
@@ -400,7 +400,7 @@ async function consumeStream(
         : contentBlocks
             .filter((b): b is Extract<MessageContentBlock, { type: 'text' }> => b.type === 'text')
             .map((b) => b.text)
-            .join('')
+            .join('\n\n')
             .trim();
       if (content) {
         addMessage(sessionId, 'assistant', content);