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/inherited-env.test.js

@@ -0,0 +1,29 @@
+import { describe, expect, it } from 'vitest';
+import { stripAppImageArgv0Leak } from './inherited-env.js';
+
+describe('stripAppImageArgv0Leak', () => {
+  it('removes ARGV0 from a child env object', () => {
+    const env = {
+      PATH: '/usr/bin',
+      ARGV0: '/path/to/OpenChamber-1.17.2-linux-x86_64.AppImage',
+      SHELL: '/bin/zsh',
+    };
+
+    expect(stripAppImageArgv0Leak(env)).toBe(env);
+    expect(env).toEqual({
+      PATH: '/usr/bin',
+      SHELL: '/bin/zsh',
+    });
+  });
+
+  it('is a no-op when ARGV0 is absent', () => {
+    const env = { PATH: '/usr/bin', SHELL: '/bin/bash' };
+    stripAppImageArgv0Leak(env);
+    expect(env).toEqual({ PATH: '/usr/bin', SHELL: '/bin/bash' });
+  });
+
+  it('tolerates nullish env values', () => {
+    expect(stripAppImageArgv0Leak(null)).toBeNull();
+    expect(stripAppImageArgv0Leak(undefined)).toBeUndefined();
+  });
+});