feat: add uninstaller scripts for all tools + restore yolo mode

Uninstallers (.sh + .ps1) for Claude, Gemini, Codex, Qwen:
- Remove npm package / binary
- Remove settings directory (~/.gemini, ~/.qwen, ~/.codex, ~/.claude)
- Remove env vars from bashrc/zshrc, /etc/environment, /etc/profile.d
- Remove npm registry config

Also: restore defaultApprovalMode=yolo (npm package now includes
Target 9a patch in settingsSchema.js)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

gemini/ugemini_install.ps1

@@ -160,7 +160,7 @@ $json = @'
     "logPrompts": false
   },
   "general": {
-    "defaultApprovalMode": "auto_edit"
+    "defaultApprovalMode": "yolo"
   }
 }
 '@

gemini/ugemini_install.sh

@@ -173,7 +173,7 @@ assert d.get('security',{}).get('auth',{}).get('selectedType') == 'gemini-api-ke
     "folderTrust": { "enabled": false }
   },
   "telemetry": { "enabled": false, "logPrompts": false },
-  "general": { "defaultApprovalMode": "auto_edit" }
+  "general": { "defaultApprovalMode": "yolo" }
 }
 SETTINGS_EOF
     # Trust common folders

gemini/ugemini_uninstall.ps1

@@ -0,0 +1,46 @@
+# Gemini CLI — Windows Uninstaller
+# Usage: powershell -ExecutionPolicy Bypass -File gemini\ugemini_uninstall.ps1
+
+$ErrorActionPreference = "Continue"
+
+Write-Host ""
+Write-Host "  +--------------------------------------+" -ForegroundColor Cyan
+Write-Host "  |   Gemini CLI -- Windows Uninstaller  |" -ForegroundColor Cyan
+Write-Host "  +--------------------------------------+" -ForegroundColor Cyan
+Write-Host ""
+
+# ---- Uninstall npm package ----
+
+Write-Host "  Removing @google/gemini-cli..." -ForegroundColor Cyan
+npm uninstall -g @google/gemini-cli 2>$null
+Write-Host "  npm package removed" -ForegroundColor Green
+
+# ---- Remove settings ----
+
+$geminiDir = "$env:USERPROFILE\.gemini"
+if (Test-Path $geminiDir) {
+    Write-Host "  Removing $geminiDir..." -ForegroundColor Cyan
+    Remove-Item -Recurse -Force $geminiDir
+    Write-Host "  Settings removed" -ForegroundColor Green
+} else {
+    Write-Host "  No settings directory found" -ForegroundColor Yellow
+}
+
+# ---- Remove env vars ----
+
+Write-Host "  Removing environment variables..." -ForegroundColor Cyan
+[System.Environment]::SetEnvironmentVariable("GEMINI_API_KEY", $null, "User")
+[System.Environment]::SetEnvironmentVariable("GOOGLE_GEMINI_BASE_URL", $null, "User")
+Remove-Item Env:GEMINI_API_KEY -ErrorAction SilentlyContinue
+Remove-Item Env:GOOGLE_GEMINI_BASE_URL -ErrorAction SilentlyContinue
+Write-Host "  Env vars removed" -ForegroundColor Green
+
+# ---- Remove npm registry config ----
+
+Write-Host "  Removing npm registry config..." -ForegroundColor Cyan
+npm config delete "@google:registry" 2>$null
+Write-Host "  Registry config removed" -ForegroundColor Green
+
+Write-Host ""
+Write-Host "  Gemini CLI fully uninstalled!" -ForegroundColor Green
+Write-Host ""

gemini/ugemini_uninstall.sh

@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+# Gemini CLI — Uninstaller
+# Removes Gemini CLI, settings, env vars, and npm registry config.
+#
+# Usage: sudo bash ugemini_uninstall.sh
+set -euo pipefail
+
+GREEN="\033[92m"
+RED="\033[91m"
+CYAN="\033[96m"
+YELLOW="\033[93m"
+BOLD="\033[1m"
+RESET="\033[0m"
+
+log()  { echo -e "${GREEN}[+]${RESET} $*"; }
+warn() { echo -e "${YELLOW}[~]${RESET} $*"; }
+info() { echo -e "${CYAN}[i]${RESET} $*"; }
+
+echo -e "${BOLD}"
+echo "  +--------------------------------------+"
+echo "  |    Gemini CLI — Uninstaller          |"
+echo "  +--------------------------------------+"
+echo -e "${RESET}"
+
+# ---- Uninstall npm package ----
+
+if command -v gemini &>/dev/null || npm list -g @google/gemini-cli &>/dev/null 2>&1; then
+    info "Removing @google/gemini-cli..."
+    npm uninstall -g @google/gemini-cli 2>/dev/null || true
+    log "npm package removed"
+else
+    warn "Gemini CLI not found in npm global packages"
+fi
+
+# ---- Remove settings ----
+
+for user_home in /root /home/*; do
+    GEMINI_DIR="$user_home/.gemini"
+    if [ -d "$GEMINI_DIR" ]; then
+        info "Removing $GEMINI_DIR..."
+        rm -rf "$GEMINI_DIR"
+        log "Removed $GEMINI_DIR"
+    fi
+done
+
+# ---- Remove env vars from shell rc files ----
+
+for user_home in /root /home/*; do
+    for rc_file in "$user_home/.bashrc" "$user_home/.zshrc"; do
+        if [ -f "$rc_file" ] && grep -q 'GEMINI_API_KEY\|GOOGLE_GEMINI_BASE_URL\|Gemini CLI' "$rc_file" 2>/dev/null; then
+            info "Cleaning env vars from $rc_file..."
+            sed -i '/# Gemini CLI/d' "$rc_file"
+            sed -i '/GEMINI_API_KEY/d' "$rc_file"
+            sed -i '/GOOGLE_GEMINI_BASE_URL/d' "$rc_file"
+            log "Cleaned $rc_file"
+        fi
+    done
+done
+
+# ---- Remove /etc/profile.d script ----
+
+if [ -f "/etc/profile.d/gemini-cli.sh" ]; then
+    info "Removing /etc/profile.d/gemini-cli.sh..."
+    rm -f "/etc/profile.d/gemini-cli.sh"
+    log "Removed /etc/profile.d/gemini-cli.sh"
+fi
+
+# ---- Remove env vars from /etc/environment ----
+
+if [ -f "/etc/environment" ] && grep -q 'GEMINI_API_KEY\|GOOGLE_GEMINI_BASE_URL' /etc/environment 2>/dev/null; then
+    info "Cleaning /etc/environment..."
+    sed -i '/GEMINI_API_KEY/d' /etc/environment
+    sed -i '/GOOGLE_GEMINI_BASE_URL/d' /etc/environment
+    log "Cleaned /etc/environment"
+fi
+
+# ---- Remove npm registry config ----
+
+info "Removing npm registry config..."
+npm config delete @google:registry 2>/dev/null || true
+log "npm registry config removed"
+
+echo ""
+echo -e "${GREEN}${BOLD}  Gemini CLI fully uninstalled!${RESET}"
+echo ""