phi config: replace HTML editor with full-screen TUI

CHANGELOG.md

@@ -12,10 +12,30 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ### Changed
 
+- `phi config` is now a full-screen terminal editor (`internal/tui/configui`)
+  instead of a loopback web page. The form edits the same keys with inline text
+  fields, choice pickers (model list, thinking level, api, permission mode),
+  tri-state toggles, and expandable bash allow/deny rule lists. Nothing is
+  written until a save, and the previous file is kept as `config.yaml.bak`.
+- The editable config schema moved to `internal/project` (`project.ConfigDoc`,
+  `ReadConfigDoc`, `Save`, `Validate`). The runtime parser and the editor now
+  share one definition instead of two hand-kept copies, and empty `api_key` /
+  `base_url` values are omitted when a file is written.
+- The `phi config` form gives its two columns one job each: labels and values the
+  file does not set share a single quiet tone, real values are body text, and
+  state (`on`, `default`, `not set`) is the only thing that spends a color. The
+  label column no longer relies on `Dim`, which terminals render anywhere from
+  soft to invisible, and a filled `api_key` now reads as data instead of as an
+  empty field.
+
 ### Deprecated
 
 ### Removed
 
+- The embedded HTML config page and its `/api/config` and `/api/models`
+  endpoints, along with the local HTTP server, origin checks, and browser
+  launch that served them.
+
 ### Fixed
 
 - `diff` pane notes no longer persist. `i` / `x` / `a` keep working, but drafts
@@ -28,6 +48,15 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
   file-operation lists are refreshed once instead of accumulating duplicate blocks.
 - Picker hints (`/` commands, `@` files, `?` shortcuts) now start in one shared
   column instead of trailing each label's own length.
+- `phi config` model headers now sit on the same grid as every other row: the
+  model name owns the label column (truncated when it does not fit) and the
+  `default` badge plus the api/context summary share the value column. A long
+  name used to reach into the summary and eat the badge's last letter.
+
+- The `phi config` confirm modal read its arrows backwards: `↑`/`←` selected No
+  and `↓`/`→` selected Yes, so pressing a key in the visible direction looked
+  dead. The keys now pick the row above / below like every other decision
+  panel, and the footer says `↑↓ move` instead of pointing at a horizontal axis.
 
 ### Security
 

README.md

@@ -30,6 +30,8 @@ A lean, high-performance terminal coding agent harness in Go — a sibling to Pi
 
 ![phi diff review](assets/diff.png)
 
+![phi config viewer](assets/phi-config.png)
+
 - [Docs](https://pulseaiclub.github.io/docs/getting-started/)
 - [Quick start](#quick-start)
 - [Footprint](#footprint)
@@ -136,10 +138,20 @@ figures.
 ## Configuration
 
 phi reads `~/.phi/config.yaml` (standard YAML). Environment variables
-override it for one-off runs. `phi config` opens an HTML editor for the same
-file in your browser.
+override it for one-off runs. `phi config` opens a full-screen terminal editor
+for the same file — nothing is written until you save, and the previous file is
+kept as `config.yaml.bak`.
+
+```
+phi config keys
+  ↑↓ ←→      move / cycle a value        a   add a model
+  ⏎          edit or open a picker       d   delete the focused row
+  esc        close, or quit              f   fetch model ids from the provider
+  ^s         save                        s   save        q  quit
+```
 
-![phi config](assets/config.png)
+An empty field means "not set", i.e. the value the loader would fill in; the
+placeholder shows that value.
 
 ```yaml
 # ~/.phi/config.yaml

README.zh-CN.md

@@ -136,9 +136,18 @@ TUI 给模型提供四个核心工具——`read`、`write`、`edit` 和 `bash`
 ## 配置
 
 phi 读取 `~/.phi/config.yaml`（标准 YAML）。环境变量可覆盖配置，用于一次性运行。
-`phi config` 会在浏览器中打开一个 HTML 编辑器来编辑同一个文件。
+`phi config` 会在终端里打开全屏编辑器来编辑同一个文件；不保存就不落盘，保存前
+的旧文件会留作 `config.yaml.bak`。
 
-![phi config](assets/config.png)
+```
+phi config 按键
+  ↑↓ ←→      移动 / 切换取值            a   新增模型
+  ⏎          编辑，或打开选择列表       d   删除当前行
+  esc        收起列表 / 退出            f   从服务商拉取模型列表
+  ^s         保存                       s   保存     q  退出
+```
+
+留空表示「未设置」，也就是交给加载器填默认值；占位符显示的就是那个值。
 
 ```yaml
 # ~/.phi/config.yaml