初始化：私有维护版 Gemini-in-Chrome 安装脚本

从 appsail/Gemini-in-Chrome (MIT) fork 并重写 install.sh / install.ps1：
- 原脚本用正则/sed 做“仅替换已存在字段”，字段本不存在时静默不生效
- 改为 JSON 感知读写（jq 优先，探测/自动装失败时降级为 sed+awk 零依赖兜底）
- 修复过程中实测发现并修掉的坑：BSD sed 不支持 GNU 的 0,/re/ 插入语法、
  正则不容忍冒号后空格导致插入重复 key、macOS 系统自带 bash 3.2 在脚本文件模式下
  中文紧跟未加花括号的 $VAR 会解析错位丢字节
- 新增 test-fixtures/ 下完全人工构造（非真实数据脱敏）的多 profile 测试样本
- README 改为中文，下载链接指向本仓库，补充 MIT LICENSE 及上游致谢

.gitignore

@@ -0,0 +1,11 @@
+# macOS
+.DS_Store
+
+# Backup files
+*.bak
+
+# Editor
+.vscode/
+.idea/
+*.swp
+*.swo

LICENSE

@@ -0,0 +1,28 @@
+MIT License
+
+Copyright (c) 2026 Shunzhi Jiang
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---
+
+This project is a fork/rewrite of appsail/Gemini-in-Chrome
+(https://github.com/appsail/Gemini-in-Chrome), which is stated by its README
+to be MIT licensed (no LICENSE file was present in the upstream source at the
+time of forking).

README.md

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+# Gemini in Chrome
+
+> Fork 自：[appsail/Gemini-in-Chrome](https://github.com/appsail/Gemini-in-Chrome)（MIT License）
+
+一键脚本，用于强制启用 Chrome 内置的 Gemini AI 功能（绕过非美区的资格限制）。
+
+基于上述原项目重写，修复了原脚本"字段不存在时静默不生效"的问题，改为 JSON 感知读写
+（`jq` 优先，装不上时自动降级为 `sed`+`awk` 零依赖兜底方案），并支持同一台机器上的
+多个 Chrome 账号（profile）。
+
+## 快速开始
+
+### macOS / Linux
+
+```bash
+curl -fsSL https://gitea.rk-health.com/jiangshunzhi/Gemini-in-Chrome/raw/branch/main/install.sh | bash
+```
+
+### Windows
+
+打开 PowerShell 执行：
+
+```powershell
+irm https://gitea.rk-health.com/jiangshunzhi/Gemini-in-Chrome/raw/branch/main/install.ps1 | iex
+```
+
+## 脚本做了什么
+
+1. ✅ 检查 Chrome 是否在运行（在运行的话会提示你先完全退出——Local State 会在 Chrome 退出时被覆写，不退出改了也白改）
+2. 💾 备份原配置文件（`Local State.bak`）
+3. 🔧 修补以下字段（存在则替换、不存在则插入，而不是原脚本那种"只替换已存在字段"的逻辑）：
+   - 顶层 `variations_country` → `"us"`
+   - 顶层 `variations_permanent_consistency_country` → `[当前 Chrome 版本号, "us"]`
+   - `profile.info_cache` 下**每一个** profile 的 `is_glic_eligible` → `true`（不只是已存在该字段的那个）
+4. ✓ 写回前后都做合法性校验，`sed`+`awk` 兜底路径下用括号配平检查兜底；校验不过就自动放弃改动，不会覆盖原文件
+5. ✓ 汇报本次实际用的是 `jq` 路径还是 `sed`+`awk` 兜底路径，以及各字段是否生效
+
+## 还原原始配置
+
+**macOS：**
+```bash
+mv ~/Library/Application\ Support/Google/Chrome/Local\ State.bak \
+   ~/Library/Application\ Support/Google/Chrome/Local\ State
+```
+
+**Linux：**
+```bash
+mv ~/.config/google-chrome/Local\ State.bak \
+   ~/.config/google-chrome/Local\ State
+```
+
+**Windows PowerShell：**
+```powershell
+Move-Item -Path "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State.bak" `
+          -Destination "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State" -Force
+```
+
+## 安全性
+
+- 改动前一定会先备份原配置
+- 只改本地 Chrome 配置，不上传任何数据、不访问网络（除了下载脚本本身，以及 `jq` 缺失时按需自动安装）
+- 改动前后都做合法性校验，写坏了会自动回滚、不覆盖原文件
+- 随时可还原
+- 非官方脚本，仅供个人研究/自用，风险自负
+
+## jq 依赖说明
+
+macOS 上如果检测到 `jq` 就直接用；没有的话，检测到 Homebrew 会尝试 `brew install jq`，
+没有 Homebrew 就直接走零依赖兜底，不会替你装 Homebrew。
+
+Linux 上会按顺序探测 `apt-get`/`dnf`/`yum`/`pacman`/`apk` 并尝试自动安装（可能会弹 `sudo`
+密码提示）；装不上（比如设备网络受限）同样自动降级为 `sed`+`awk` 方案。
+
+`install.ps1`（Windows）用 PowerShell 原生的 `ConvertFrom-Json`/`ConvertTo-Json`，本身就不
+依赖 `jq`。
+
+## 配置文件路径
+
+| 系统 | 路径 |
+|----|------|
+| macOS | `~/Library/Application Support/Google/Chrome/Local State` |
+| Linux | `~/.config/google-chrome/Local State` |
+| Windows | `%LOCALAPPDATA%\Google\Chrome\User Data\Local State` |
+
+## 测试
+
+`test-fixtures/` 下有一份完全人工构造（非真实账号脱敏）的多 profile 测试样本，
+覆盖了"字段缺失 / 已是 false / 已是 true"三种场景，用法见该目录下的 README。
+
+## License
+
+MIT，见 [LICENSE](./LICENSE)。基于 [appsail/Gemini-in-Chrome](https://github.com/appsail/Gemini-in-Chrome) 重写。

install.ps1

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+# 强制启用 Chrome 中的 Gemini（Project Glic）(PowerShell 版本)
+# 通过修补 Chrome 的 Local State 配置文件，绕过地区资格限制
+# 支持系统：Windows
+#
+# PowerShell 原生自带 ConvertFrom-Json / ConvertTo-Json，天然是 JSON 感知的，
+# 不需要像 macOS/Linux 那边为了避免依赖 jq 而手写括号深度扫描兜底方案。
+
+Write-Host ""
+Write-Host "🚀 Gemini in Chrome Enabler" -ForegroundColor Cyan
+Write-Host ""
+
+# Chrome 配置文件路径
+$chromeStatePath = "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State"
+
+# 检查 Chrome 是否在运行；Local State 会在 Chrome 退出时被覆写，
+# 所以修改前必须确保 Chrome 完全退出
+$chromeProcesses = Get-Process -Name "chrome" -ErrorAction SilentlyContinue
+if ($chromeProcesses) {
+    Write-Host "⚠️  Chrome 正在运行，请先完全退出再继续。" -ForegroundColor Yellow
+    Read-Host "关闭 Chrome 后按回车继续"
+    $chromeProcesses = Get-Process -Name "chrome" -ErrorAction SilentlyContinue
+    if ($chromeProcesses) {
+        Write-Host "❌ Chrome 仍在运行，请退出后重试。" -ForegroundColor Red
+        exit 1
+    }
+}
+
+# 检查配置文件是否存在
+if (-not (Test-Path $chromeStatePath)) {
+    Write-Host "❌ 未找到 Chrome 配置文件：$chromeStatePath" -ForegroundColor Red
+    exit 1
+}
+
+# 备份原文件
+$backupPath = "$chromeStatePath.bak"
+Copy-Item -Path $chromeStatePath -Destination $backupPath -Force
+Write-Host "✓ 已备份：Local State.bak" -ForegroundColor Green
+
+# 探测本机安装的 Chrome 版本号（写入 variations_permanent_consistency_country 用）
+function Get-ChromeVersion {
+    $candidates = @(
+        "$env:ProgramFiles\Google\Chrome\Application\chrome.exe",
+        "${env:ProgramFiles(x86)}\Google\Chrome\Application\chrome.exe",
+        "$env:LOCALAPPDATA\Google\Chrome\Application\chrome.exe"
+    )
+    foreach ($path in $candidates) {
+        if (Test-Path $path) {
+            return (Get-Item $path).VersionInfo.ProductVersion
+        }
+    }
+    return ""
+}
+
+$chromeVersion = Get-ChromeVersion
+if (-not $chromeVersion) {
+    Write-Host "⚠️  未能自动探测 Chrome 版本号，variations_permanent_consistency_country 的版本位会留空" -ForegroundColor Yellow
+}
+
+# 读取并解析 JSON（-Depth 需要给够，避免嵌套结构在读取阶段被截断）
+$json = Get-Content -Path $chromeStatePath -Raw -Encoding UTF8 | ConvertFrom-Json -Depth 100
+
+# 对可能不存在的属性做"存在则改、不存在则插入"的统一封装，
+# 因为 PSCustomObject 对不存在的属性不能直接用 `=` 赋值
+function Set-JsonProperty {
+    param(
+        [Parameter(Mandatory)] $Object,
+        [Parameter(Mandatory)] [string] $Name,
+        [Parameter(Mandatory)] $Value
+    )
+    if ($Object.PSObject.Properties.Name -contains $Name) {
+        $Object.$Name = $Value
+    } else {
+        $Object | Add-Member -NotePropertyName $Name -NotePropertyValue $Value -Force
+    }
+}
+
+Set-JsonProperty -Object $json -Name "variations_country" -Value "us"
+Set-JsonProperty -Object $json -Name "variations_permanent_consistency_country" -Value @($chromeVersion, "us")
+
+# profile.info_cache 下每个 profile 都补 is_glic_eligible，而不仅仅是已存在该字段的 profile
+if (-not ($json.PSObject.Properties.Name -contains "profile")) {
+    $json | Add-Member -NotePropertyName "profile" -NotePropertyValue ([PSCustomObject]@{}) -Force
+}
+if (-not ($json.profile.PSObject.Properties.Name -contains "info_cache")) {
+    $json.profile | Add-Member -NotePropertyName "info_cache" -NotePropertyValue ([PSCustomObject]@{}) -Force
+}
+foreach ($entry in $json.profile.info_cache.PSObject.Properties) {
+    Set-JsonProperty -Object $entry.Value -Name "is_glic_eligible" -Value $true
+}
+
+# 写回：UTF-8 无 BOM（Chrome 要求），-Depth 同样要给够——
+# 默认的 -Depth 2 会把深层嵌套对象压成 "System.Object[]" 之类的字符串，直接写坏配置
+$newContent = $json | ConvertTo-Json -Depth 100 -Compress
+$utf8NoBom = New-Object System.Text.UTF8Encoding $false
+$tmpPath = "$chromeStatePath.tmp"
+[System.IO.File]::WriteAllText($tmpPath, $newContent, $utf8NoBom)
+
+# 校验写回的内容仍是合法 JSON，且目标字段确实生效；不合法就回滚、不覆盖原文件
+try {
+    $verify = Get-Content -Path $tmpPath -Raw -Encoding UTF8 | ConvertFrom-Json -Depth 100
+    if ($verify.variations_country -ne "us") {
+        throw "variations_country 未生效"
+    }
+    Move-Item -Path $tmpPath -Destination $chromeStatePath -Force
+} catch {
+    Write-Host "❌ 校验失败，已放弃本次修改（原文件未被触碰）：$_" -ForegroundColor Red
+    Remove-Item -Path $tmpPath -ErrorAction SilentlyContinue
+    exit 1
+}
+
+# 汇报结果
+Write-Host ""
+$errors = 0
+$final = Get-Content -Path $chromeStatePath -Raw -Encoding UTF8 | ConvertFrom-Json -Depth 100
+if ($final.variations_country -eq "us") {
+    Write-Host "✓ variations_country 已设为 us" -ForegroundColor Green
+} else {
+    Write-Host "⚠️  variations_country 未生效" -ForegroundColor Yellow
+    $errors++
+}
+$allEligible = $true
+foreach ($entry in $final.profile.info_cache.PSObject.Properties) {
+    if ($entry.Value.is_glic_eligible -ne $true) { $allEligible = $false }
+}
+if ($allEligible) {
+    Write-Host "✓ is_glic_eligible 已对所有 profile 启用" -ForegroundColor Green
+} else {
+    Write-Host "⚠️  部分 profile 的 is_glic_eligible 未生效" -ForegroundColor Yellow
+    $errors++
+}
+
+Write-Host ""
+if ($errors -eq 0) {
+    Write-Host "✅ 完成！请完全重启 Chrome 使改动生效。" -ForegroundColor Green
+} else {
+    Write-Host "⚠️  部分改动可能未生效，请检查 Chrome 版本。" -ForegroundColor Yellow
+}

install.sh

@@ -0,0 +1,358 @@
+#!/bin/bash
+
+# 强制启用 Chrome 中的 Gemini（Project Glic）
+# 通过修补 Chrome 的 Local State 配置文件，绕过地区资格限制
+# 支持系统：macOS、Linux
+#
+# 设计说明：
+#   - 优先用 jq 做 JSON 级别的读写（准确、可读性好）；
+#   - 没有 jq 时按系统类型自动尝试安装（macOS 用 brew，Linux 探测常见包管理器）；
+#   - 自动安装失败（例如设备网络受限）时，降级为 sed（处理两个顶层标量/数组字段）
+#     + awk（对 profile.info_cache 做带引号转义感知的括号深度扫描，逐个 profile 插入字段）
+#     的零依赖兜底方案，只重写 info_cache 这一小段字节范围，其余内容原样透传。
+#
+# 编码注意事项（实测踩过的坑）：
+#   macOS 自带 /bin/bash 是 3.2.57（苹果因 GPLv3 许可问题多年未升级）。以脚本文件方式
+#   运行时，一旦某个多字节 UTF-8 字符（中文、全角标点等）紧跟一个**未加花括号**的
+#   `$VAR`，bash 3.2 的分词会解析错位、丢字节，输出会出现乱码或字段被吞掉——交互式敲同样
+#   的命令反而不会复现。本文件里所有紧跟中文/全角字符之后的变量引用一律写成 `${VAR}`。
+
+set -e
+
+echo ""
+echo "🚀 Gemini in Chrome Enabler"
+echo ""
+
+# 探测系统类型，确定配置文件路径
+OS_TYPE=$(uname -s)
+case "$OS_TYPE" in
+    Darwin)
+        CHROME_STATE=~/Library/Application\ Support/Google/Chrome/Local\ State
+        CHROME_PROCESS="Google Chrome"
+        ;;
+    Linux)
+        CHROME_STATE=~/.config/google-chrome/Local\ State
+        CHROME_PROCESS="chrome"
+        ;;
+    *)
+        echo "💡 Windows 用户请直接运行同目录下的 install.ps1"
+        exit 1
+        ;;
+esac
+
+# 跨 BSD sed（macOS）/ GNU sed（Linux）的原地编辑封装
+sed_inplace() {
+    if [[ "$OS_TYPE" == "Darwin" ]]; then
+        sed -i '' "$@"
+    else
+        sed -i "$@"
+    fi
+}
+
+# 检查 Chrome 是否在运行；Local State 会在 Chrome 退出时被覆写，
+# 所以修改前必须确保 Chrome 完全退出
+check_chrome_running() {
+    pgrep -x "$CHROME_PROCESS" > /dev/null 2>&1
+}
+
+if check_chrome_running; then
+    echo "⚠️  Chrome 正在运行！"
+    if [[ "$OS_TYPE" == "Darwin" ]]; then
+        echo "📌 请先完全退出 Chrome（Cmd+Q）再继续"
+    else
+        echo "📌 请先完全退出 Chrome 再继续"
+    fi
+    echo ""
+    read -p "关闭 Chrome 后按回车继续... " -r
+    echo ""
+
+    if check_chrome_running; then
+        echo "❌ Chrome 仍在运行，请退出后重试。"
+        exit 1
+    fi
+fi
+
+# 检查配置文件是否存在
+if [ ! -f "$CHROME_STATE" ]; then
+    echo "❌ 未找到 Chrome 配置文件：${CHROME_STATE}"
+    exit 1
+fi
+
+# 备份原文件
+cp "$CHROME_STATE" "$CHROME_STATE.bak"
+echo "✓ 已备份：Local State.bak"
+
+# 探测本机安装的 Chrome 版本号（写入 variations_permanent_consistency_country 用）
+detect_chrome_version() {
+    local version=""
+    if [[ "$OS_TYPE" == "Darwin" ]]; then
+        version=$(mdls -name kMDItemVersion -raw "/Applications/Google Chrome.app" 2>/dev/null || true)
+        if [[ -z "$version" || "$version" == "(null)" ]]; then
+            version=$(defaults read "/Applications/Google Chrome.app/Contents/Info" CFBundleShortVersionString 2>/dev/null || true)
+        fi
+    else
+        if command -v google-chrome >/dev/null 2>&1; then
+            version=$(google-chrome --version 2>/dev/null | grep -oE '[0-9]+(\.[0-9]+){2,3}' | head -1 || true)
+        elif command -v google-chrome-stable >/dev/null 2>&1; then
+            version=$(google-chrome-stable --version 2>/dev/null | grep -oE '[0-9]+(\.[0-9]+){2,3}' | head -1 || true)
+        fi
+    fi
+    echo "$version"
+}
+
+CHROME_VERSION=$(detect_chrome_version)
+if [[ -z "$CHROME_VERSION" ]]; then
+    echo "⚠️  未能自动探测 Chrome 版本号，variations_permanent_consistency_country 的版本位会留空"
+fi
+
+# 探测 jq；没有则按系统类型自动尝试安装（绝不自动安装 Homebrew 本身）
+ensure_jq() {
+    if command -v jq >/dev/null 2>&1; then
+        return 0
+    fi
+
+    echo "ℹ️  未检测到 jq，尝试自动安装..."
+    case "$OS_TYPE" in
+        Darwin)
+            if command -v brew >/dev/null 2>&1; then
+                brew install jq || true
+            else
+                echo "⚠️  未检测到 Homebrew，跳过自动安装（不会自动装 Homebrew）"
+            fi
+            ;;
+        Linux)
+            if command -v apt-get >/dev/null 2>&1; then
+                sudo apt-get update -y && sudo apt-get install -y jq || true
+            elif command -v dnf >/dev/null 2>&1; then
+                sudo dnf install -y jq || true
+            elif command -v yum >/dev/null 2>&1; then
+                sudo yum install -y jq || true
+            elif command -v pacman >/dev/null 2>&1; then
+                sudo pacman -Sy --noconfirm jq || true
+            elif command -v apk >/dev/null 2>&1; then
+                sudo apk add jq || true
+            else
+                echo "⚠️  未找到已知的包管理器，跳过自动安装"
+            fi
+            ;;
+    esac
+
+    if command -v jq >/dev/null 2>&1; then
+        echo "✓ jq 安装成功"
+        return 0
+    else
+        echo "⚠️  jq 安装失败或被跳过，降级为 sed+awk 零依赖方案"
+        return 1
+    fi
+}
+
+TMP_FILE="${CHROME_STATE}.tmp.$$"
+PATCH_METHOD=""
+
+if ensure_jq; then
+    PATCH_METHOD="jq"
+    # -c 保持压缩单行输出：一是跟 Chrome 自己写出来的格式一致、改动面最小，
+    # 二是脚本末尾的校验用 grep 做字面量匹配，没有 -c 的话 jq 会输出带缩进的多行
+    # JSON，字段其实生效了，但 grep 会因为格式不匹配而误报"未生效"——实测踩过这个坑。
+    jq -c --arg ver "$CHROME_VERSION" '
+        .variations_country = "us"
+        | .variations_permanent_consistency_country = [$ver, "us"]
+        | .profile.info_cache = ((.profile.info_cache // {}) | with_entries(.value.is_glic_eligible = true))
+    ' "$CHROME_STATE" > "$TMP_FILE"
+else
+    PATCH_METHOD="sed+awk"
+
+    cp "$CHROME_STATE" "$TMP_FILE"
+
+    # 顶层字段：存在则替换，不存在则插入到根对象的第一个 '{' 之后。
+    # 注意：这里用 `1s/{/.../ `（POSIX 通用写法，Local State 本身就是单行 JSON）
+    # 而不是 `0,/{/s//.../ ` —— 后者是 GNU sed 的扩展语法，在 macOS 自带的 BSD sed
+    # 上会静默不生效（退出码仍是 0，但完全没有插入），实测踩过这个坑。
+    # 冒号两侧允许出现空白再匹配——真实 Chrome 写出的 Local State 是压缩无空格的单行
+    # JSON，理论上用不到这个容错，但如果“判断是否存在”和“实际替换”的正则宽松度不一致，
+    # 一旦真的遇到带空格的输入，会把“判断为不存在”和“已存在但没匹配上替换”这两种情况
+    # 搞混，插入一个重复 key（JSON 语法上合法，但解析器通常只认最后一个，等于新值被
+    # 静默吞掉）。这里两处判断都用同一个宽松正则，避免这种不一致。
+    if grep -Eq '"variations_country"[[:space:]]*:[[:space:]]*"[^"]*"' "$TMP_FILE"; then
+        sed_inplace -E 's/"variations_country"[[:space:]]*:[[:space:]]*"[^"]*"/"variations_country":"us"/' "$TMP_FILE"
+    else
+        sed_inplace "1s/{/{\"variations_country\":\"us\",/" "$TMP_FILE"
+    fi
+
+    if grep -Eq '"variations_permanent_consistency_country"[[:space:]]*:[[:space:]]*\[' "$TMP_FILE"; then
+        sed_inplace -E "s/\"variations_permanent_consistency_country\"[[:space:]]*:[[:space:]]*\[[^]]*\]/\"variations_permanent_consistency_country\":[\"${CHROME_VERSION}\",\"us\"]/" "$TMP_FILE"
+    else
+        sed_inplace "1s/{/{\"variations_permanent_consistency_country\":[\"${CHROME_VERSION}\",\"us\"],/" "$TMP_FILE"
+    fi
+
+    # 已存在 is_glic_eligible:false 的 profile 直接原地翻转为 true——
+    # 这个字段是布尔标量，全文只会以 profile 的直接子字段形式出现，
+    # 用简单正则翻转是安全的，不需要结构感知
+    sed_inplace -e 's/"is_glic_eligible":[[:space:]]*false/"is_glic_eligible":true/g' "$TMP_FILE"
+
+    # profile.info_cache 下完全没有 is_glic_eligible 字段的 profile 补插入：需要结构感知，
+    # 用 awk 做带引号转义感知的括号深度扫描，只重写 info_cache 这一小段
+    AWK_SCRIPT="${TMP_FILE}.awk"
+    cat > "$AWK_SCRIPT" <<'AWK_EOF'
+{
+    if (NR == 1) content = $0
+    else content = content "\n" $0
+}
+END {
+    # 定位 "info_cache" 键之后的 '{'，冒号两侧允许空白（跟顶层字段那两处保持同一容错水平，
+    # 避免"字符串精确匹配"这个原脚本的老问题在这里换了个地方重新出现）
+    key = "\"info_cache\""
+    keyPos = index(content, key)
+    if (keyPos == 0) {
+        # 没有 info_cache（理论上不该发生，Chrome 至少会有一个 profile），原样输出
+        printf "%s\n", content
+        exit
+    }
+    p = keyPos + length(key)
+    n0 = length(content)
+    while (p <= n0 && substr(content, p, 1) ~ /[ \t\r\n]/) p++
+    if (substr(content, p, 1) != ":") {
+        printf "%s\n", content
+        exit
+    }
+    p++
+    while (p <= n0 && substr(content, p, 1) ~ /[ \t\r\n]/) p++
+    if (substr(content, p, 1) != "{") {
+        printf "%s\n", content
+        exit
+    }
+    objStart = p
+
+    # 第一遍扫描：定位 info_cache 对象的匹配右括号
+    depth = 0
+    inStr = 0
+    n = length(content)
+    i = objStart
+    objEnd = 0
+    while (i <= n) {
+        c = substr(content, i, 1)
+        if (inStr) {
+            if (c == "\\") { i += 2; continue }
+            else if (c == "\"") { inStr = 0 }
+        } else {
+            if (c == "\"") { inStr = 1 }
+            else if (c == "{" || c == "[") { depth++ }
+            else if (c == "}" || c == "]") {
+                depth--
+                if (depth == 0) { objEnd = i; break }
+            }
+        }
+        i++
+    }
+
+    if (objEnd == 0) {
+        # 括号没配平，说明文件本身有问题，不做任何改动，原样输出并报错
+        printf "%s\n", content > "/dev/stderr"
+        print "AWK_BRACE_MISMATCH" > "/dev/stderr"
+        exit 1
+    }
+
+    span = substr(content, objStart, objEnd - objStart + 1)
+
+    # 第二遍扫描：只在 info_cache 的直接子对象（每个 profile）里检查/插入 is_glic_eligible
+    out = ""
+    depth2 = 0
+    inStr2 = 0
+    childStart = 0
+    m = length(span)
+    j = 1
+    while (j <= m) {
+        c = substr(span, j, 1)
+        out = out c
+        if (inStr2) {
+            if (c == "\\") {
+                j++
+                if (j <= m) out = out substr(span, j, 1)
+            } else if (c == "\"") {
+                inStr2 = 0
+            }
+        } else if (c == "\"") {
+            inStr2 = 1
+        } else if (c == "{" || c == "[") {
+            depth2++
+            if (depth2 == 2 && c == "{") childStart = length(out)
+        } else if (c == "}" || c == "]") {
+            if (depth2 == 2 && c == "}") {
+                childSlice = substr(out, childStart + 1, length(out) - childStart - 1)
+                if (index(childSlice, "\"is_glic_eligible\"") == 0) {
+                    out = substr(out, 1, length(out) - 1) ",\"is_glic_eligible\":true}"
+                }
+            }
+            depth2--
+        }
+        j++
+    }
+
+    newContent = substr(content, 1, objStart - 1) out substr(content, objEnd + 1)
+    printf "%s\n", newContent
+}
+AWK_EOF
+
+    awk -f "$AWK_SCRIPT" "$TMP_FILE" > "${TMP_FILE}.out"
+    mv "${TMP_FILE}.out" "$TMP_FILE"
+    rm -f "$AWK_SCRIPT"
+
+    # 零依赖场景下没有真正的 JSON 解析器可用，做一个括号配平 + 首尾定界符的
+    # 保守合法性检查兜底（不是完整 JSON 校验，但能拦住most常见的写坏场景）
+    balance_check() {
+        awk '
+        {
+            if (NR == 1) content = $0
+            else content = content "\n" $0
+        }
+        END {
+            depth = 0
+            inStr = 0
+            n = length(content)
+            for (i = 1; i <= n; i++) {
+                c = substr(content, i, 1)
+                if (inStr) {
+                    if (c == "\\") { i++; continue }
+                    else if (c == "\"") inStr = 0
+                } else {
+                    if (c == "\"") inStr = 1
+                    else if (c == "{" || c == "[") depth++
+                    else if (c == "}" || c == "]") depth--
+                }
+            }
+            exit (depth == 0) ? 0 : 1
+        }' "$1"
+    }
+
+    if ! balance_check "$TMP_FILE"; then
+        echo "❌ 兜底方案生成的内容括号不配平，判定为写坏，已放弃本次修改（原文件未被触碰）"
+        rm -f "$TMP_FILE"
+        exit 1
+    fi
+fi
+
+mv "$TMP_FILE" "$CHROME_STATE"
+
+# 校验结果
+echo ""
+echo "（本次修补方式：${PATCH_METHOD}）"
+errors=0
+if grep -q '"variations_country":"us"' "$CHROME_STATE"; then
+    echo "✓ variations_country 已设为 us"
+else
+    echo "⚠️  variations_country 未生效"
+    ((errors++)) || true
+fi
+if grep -q '"is_glic_eligible":true' "$CHROME_STATE"; then
+    echo "✓ is_glic_eligible 已启用"
+else
+    echo "⚠️  is_glic_eligible 未生效"
+    ((errors++)) || true
+fi
+
+echo ""
+if [ $errors -eq 0 ]; then
+    echo "✅ 完成！请完全重启 Chrome 使改动生效。"
+else
+    echo "⚠️  部分改动可能未生效，请检查 Chrome 版本或改用 --force-glic-eligible 之类的实验开关。"
+fi

test-fixtures/Local State.sample.json

@@ -0,0 +1 @@
+{"autofill":{"ablation_seed":"AAAAAAAAAAA="},"breadcrumbs":{"enabled":false,"enabled_time":"13400000000000000"},"browser":{"first_run_finished":true,"last_whats_new_version":151,"whats_new":{"enabled_order":["VerticalTabsLaunch"]}},"demographics_birth_year_offset":0,"enterprise_reporting":{"saas_usage":{"last_trigger_time":"13400000000000000"}},"hardware_acceleration_mode_previous":true,"legacy":{"profile":{"name":{"migrated":true}}},"management":{"platform":{"enterprise_mdm_mac":0,"last_log_time":"13400000000000000"}},"network_time":{"network_time_mapping":{"local":1700000000000.0,"network":1700000000000.0,"ticks":90000000000.0,"uncertainty":1000000.0}},"optimization_guide":{"model_cache_key_mapping":{"TESTKEY000000001":"TESTMODEL0000001"},"model_store_metadata":{"1":{"TESTMODEL0000001":{"et":"13400000000000000","kbvd":true,"mbd":"1/TESTKEY000000001/TESTBLOB00000001","v":"1"}}},"on_device":{"last_version":"151.0.7922.138","model_crash_count":0,"performance_class":5,"performance_class_version":"151.0.7922.138","vram_mb":"8192"},"predictionmodelfetcher":{"last_fetch_attempt":"13400000000000000","last_fetch_success":"13400000000000000"}},"password_manager":{"had_biometrics_available":false},"performance_intervention":{"last_daily_sample":"13400000000000000"},"performance_tuning":{"last_battery_use":{"timestamp":"13400000000000000"}},"policy":{"last_statistics_update":"13400000000000000"},"profile":{"info_cache":{"Default":{"active_time":1700000000.0,"ai_subscription_tier":1,"avatar_icon":"chrome://theme/IDR_PROFILE_AVATAR_26","background_apps":false,"default_avatar_fill_color":-14868944,"default_avatar_stroke_color":-3816227,"enterprise_label":"","force_signin_profile_locked":false,"gaia_given_name":"Test","gaia_id":"100000000000000000001","gaia_name":"Test User One","gaia_picture_file_name":"Google Profile Picture.png","hosted_domain":"NO_HOSTED_DOMAIN","is_consented_primary_account":true,"is_ephemeral":false,"is_managed":0,"is_using_default_avatar":true,"is_using_default_name":false,"last_downloaded_gaia_picture_url_with_size":"https://example.com/fake-avatar-1.png","managed_user_id":"","metrics_bucket_index":1,"name":"Test","profile_color_seed":-16775169,"profile_highlight_color":-14868944,"signin.with_credential_provider":false,"user_accepted_account_management":false,"user_name":"test.user.one@example.com"},"Profile 1":{"active_time":1700000001.0,"ai_subscription_tier":0,"avatar_icon":"chrome://theme/IDR_PROFILE_AVATAR_5","gaia_given_name":"Work","gaia_id":"100000000000000000002","gaia_name":"Test User Two","hosted_domain":"NO_HOSTED_DOMAIN","is_glic_eligible":false,"is_using_default_avatar":false,"name":"Work","user_name":"test.user.two@example.com"},"Profile 2":{"active_time":1700000002.0,"ai_subscription_tier":1,"avatar_icon":"chrome://theme/IDR_PROFILE_AVATAR_9","gaia_given_name":"Personal","gaia_id":"100000000000000000003","gaia_name":"Test User Three","hosted_domain":"NO_HOSTED_DOMAIN","is_glic_eligible":true,"is_using_default_avatar":true,"name":"Personal","user_name":"test.user.three@example.com"}},"last_active_profiles":["Profile 1","Profile 2"],"metrics":{"next_bucket_index":4},"profile_counts_reported":"13400000000000000","profiles_order":["Default","Profile 1","Profile 2"]},"restart":{"last":{"session":{"on":{"shutdown":false}}}},"segmentation_platform":{"ukm_most_recent_allowed_time_key":"13400000000000000"},"session_id_generator_last_value":"1000000000","signin":{"active_accounts":{"FAKEHASH0000000000000000000000000000000001=":"13400000000000000"},"active_accounts_last_emitted":"13400000000000000","active_accounts_managed":{"FAKEHASH0000000000000000000000000000000001=":false}},"subresource_filter":{"ruleset_version":{"checksum":0,"content":"9.70.0","format":38}},"tab_stats":{"discards_external":0,"discards_frozen":0,"discards_proactive":0,"discards_suggested":0,"discards_urgent":0,"last_daily_sample":"13400000000000000","max_tabs_per_window":1,"reloads_external":0,"reloads_frozen":0,"reloads_proactive":0,"reloads_suggested":0,"reloads_urgent":0,"total_tab_count_max":1,"window_count_max":1},"toast":{"non_milestone_update_toast_version":"151.0.7922.138"},"ukm":{"client_id":"1000000000000000000","persisted_logs":[{"data":"FAKEBASE64DATA0000000000000000000000000000","hash":"FAKEHASH00000000000000000000=","signature":"FAKESIGNATURE0000000000000000000000000000=","timestamp":"1700000000","type":0}],"session_id":1},"uninstall_metrics":{"installation_date2":"1700000000"},"updateclientdata":{"apps":{"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa":{"cohort":"1:0000:","cohortname":"Stable","dlrc":1,"fp":"","installdate":1,"max_pv":"0.0.0.0","pf":"00000000-0000-0000-0000-000000000000","pv":"1.0.0.0"}}},"was":{"restarted":false}}

test-fixtures/README.md

@@ -0,0 +1,35 @@
+# 测试用 Local State fixture
+
+`Local State.sample.json` 是**完全人工构造**的样本文件，不是从任何真实 Chrome 安装脱敏而来——
+所有 `gaia_id`、姓名、邮箱、头像 URL 等字段都是占位符（`test.user.one@example.com` 之类），
+不包含任何真实账号信息，可以放心提交到仓库、拿去别的机器测试。
+
+结构上覆盖了 `profile.info_cache` 的三种场景，用来验证 `install.sh` / `install.ps1`
+对每个 profile 的处理是否正确：
+
+| profile | 初始状态 | 用来验证什么 |
+|---|---|---|
+| `Default` | 完全没有 `is_glic_eligible` 字段 | 插入逻辑 |
+| `Profile 1` | `is_glic_eligible: false` | 翻转逻辑 |
+| `Profile 2` | `is_glic_eligible: true` | 已生效时保持不变、不产生重复 key |
+
+顶层也没有 `variations_country` / `variations_permanent_consistency_country`，用来验证插入逻辑。
+
+## 在 Windows 上测试 install.ps1
+
+1. 先备份你自己真实的 Local State（如果要在真实 Chrome 目录下测）：
+   ```powershell
+   Copy-Item "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State" "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State.real.bak"
+   ```
+2. 把这份 fixture 拷贝过去顶替（**记得测完要恢复**）：
+   ```powershell
+   Copy-Item ".\test-fixtures\Local State.sample.json" "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State"
+   ```
+3. 运行 `..\install.ps1`，检查输出里三个 profile 是否都提示 `is_glic_eligible` 已启用。
+4. 测完恢复真实文件：
+   ```powershell
+   Copy-Item "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State.real.bak" "$env:LOCALAPPDATA\Google\Chrome\User Data\Local State" -Force
+   ```
+
+也可以不碰真实路径，直接改一份 `install.ps1` 的副本把 `$chromeStatePath` 硬编码指向这份
+fixture，跑完直接看输出文件内容，更安全、不依赖"记得恢复"这一步。