fix: add OpenCode setup provider aliases (#4700)

Co-authored-by: Kevin <120500656+oooindefatigable@users.noreply.github.com>

tests/test_slash_setup_provider_aliases.py

@@ -0,0 +1,29 @@
+import re
+import subprocess
+from pathlib import Path
+
+
+def test_opencode_setup_provider_aliases_resolve():
+    source = Path("static/js/slashCommands.js").read_text()
+    match = re.search(
+        r"const SETUP_PROVIDER_URLS = \{[\s\S]*?\nfunction _normalizeSetupBaseUrl",
+        source,
+    )
+    assert match, "setup provider helper block not found"
+    helper_source = match.group(0).removesuffix("\nfunction _normalizeSetupBaseUrl")
+    script = helper_source + r"""
+function assert(condition, message) {
+  if (!condition) throw new Error(message);
+}
+const zenFromCommand = _setupProviderFromInput('opencode zen');
+assert(zenFromCommand && zenFromCommand.url === 'https://opencode.ai/zen/v1', 'opencode zen command alias failed');
+const goFromCommand = _setupProviderFromInput('opencode-go');
+assert(goFromCommand && goFromCommand.url === 'https://opencode.ai/zen/go/v1', 'opencode-go command alias failed');
+const zenCredential = _extractSetupProviderCredential('opencode-zen sk-test');
+assert(zenCredential && zenCredential.provider.name === 'OpenCode Zen', 'opencode-zen credential provider failed');
+assert(zenCredential.credential === 'sk-test', 'opencode-zen credential extraction failed');
+const goCredential = _extractSetupProviderCredential('opencode go sk-test');
+assert(goCredential && goCredential.provider.name === 'OpenCode Go', 'opencode go credential provider failed');
+assert(goCredential.credential === 'sk-test', 'opencode go credential extraction failed');
+"""
+    subprocess.run(["node", "-e", script], check=True)