Merge origin/main into deferred OpenCode restart branch.

Resolve ProvidersPage and lifecycle conflicts with custom providers and
AppImage ARGV0 stripping. Address review follow-ups: OAuth index helper +
tests, single auth-methods load trigger, shared Google env-alias module with
VS Code parity coverage, and deferred restart for custom provider upsert.

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

packages/web/server/lib/opencode/provider-env-aliases.d.ts

@@ -0,0 +1,3 @@
+export function applyProviderEnvAliases(
+  env: Record<string, string | undefined> | null | undefined,
+): Record<string, string | undefined>;