维护者确认: #2445 fix(desktop): allow localhost browser previews

## 触发原因

**arch**: 核心路径改动 1039 行(≥ 150) + huge-diff(1039 行 ≥ 800)

## 关联 PR

https://github.com/makecindy/cindy/pull/2445

作者: yuaiccc

## 确认方式

- 直接在 PR 上 **Approve** = 放行
- **Request Changes** = 需要作者修改,作者改完后重新 Approve 即放行

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_本 issue 由自动审查流程创建,用于跟踪维护者确认状态。_

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关联 PR:#2445(作者 @yuaiccc);本 issue 由 review-pr 流程自动创建,用于先讨论该 PR 涉及的技术架构调整,维护者确认后 PR 会恢复推进。

Start by reviewing PR #2445 and its 1,039-line diff; no source files or tests are named in this issue. Done means a maintainer has approved the architectural change, or requested changes are addressed and the PR is approved.

Written by the indexing model from the issue text.