chore: baseline snapshot before moderation-strictness feature

Repo .git was damaged (refs/ missing, index truncated, object store near-empty).
Repaired via git init (rebuilt refs), stale index preserved as .git/index.corrupt-20260910.bak,
then full worktree committed as a rollback baseline.

route/auth/logout.go

@@ -0,0 +1,14 @@
+// Copyright 2022 E99p1ant. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package auth
+
+import (
+	"github.com/tamakyi/TamaBox/internal/context"
+)
+
+func Logout(ctx context.Context) {
+	ctx.Session.Flush()
+	ctx.Redirect("/")
+}