fix(desktop): strip AppImage ARGV0 before child shells (#2588)

AppImage exports ARGV0 into the process environment. zsh treats that as
argv[0] for every external command, which broke Python venv detection in
the integrated terminal and managed OpenCode sessions.

Clear ARGV0 in Electron before login-shell probing, refuse to re-apply it
from shell snapshots, and strip it from terminal PTY and managed OpenCode
launch environments.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

packages/web/server/lib/opencode/lifecycle.js

@@ -1,5 +1,6 @@
 import { spawn, spawnSync } from 'node:child_process';
 import net from 'node:net';
+import { stripAppImageArgv0Leak } from '../inherited-env.js';
 import { registerManagedProcess, unregisterManagedProcess, reapOrphanedProcesses } from './managed-process-registry.js';
 import { recordStartupPerformance } from './startup-performance.js';
 
@@ -518,13 +519,13 @@ export const createOpenCodeLifecycleRuntime = (deps) => {
         timeout: 30000,
         cwd: state.openCodeWorkingDirectory,
         shellEnvKeysCount: Object.keys(shellEnv).length,
-        env: {
+        env: stripAppImageArgv0Leak({
           ...shellEnv,
           ...process.env,
           ...managedOpenCodeEnv,
           PATH: envPath,
           OPENCODE_SERVER_PASSWORD: openCodePassword,
-        },
+        }),
       });
 
       if (!serverInstance || !serverInstance.url) {