[Requests and ideas] Please add native VIM-style keybindings for everything.

**Mood:** 😔
**Category:** Requests and ideas

Please add native VIM-style keybindings for everything. Prompt editing is the big one, but also general navigation, scrolling, tab switching, reviewing diffs, splits, etc.

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| Field | Value |
| --- | --- |
| App version | 1.0.0 |
| OS | Ubuntu 24.4.0 |
| Theme | Chai |
| Path | / |
| Tenure | Day 1 |

该 issue 未指明文件、测试或入口点。首先定义除提示编辑之外，哪些 VIM 风格行为属于范围，包括导航、滚动、标签页切换、diff 审查和分屏。完成的要求是为所选区域制定一致认可的验收标准。

由索引模型根据 Issue 内容生成。