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>

claude/uclaude_uninstall.ps1

@@ -0,0 +1,51 @@
+# Claude Code — Windows Uninstaller
+# Usage: powershell -ExecutionPolicy Bypass -File claude\uclaude_uninstall.ps1
+
+$ErrorActionPreference = "Continue"
+
+Write-Host ""
+Write-Host "  +--------------------------------------+" -ForegroundColor Cyan
+Write-Host "  |  Claude Code -- Windows Uninstaller  |" -ForegroundColor Cyan
+Write-Host "  +--------------------------------------+" -ForegroundColor Cyan
+Write-Host ""
+
+# ---- Uninstall npm package ----
+
+Write-Host "  Removing @anthropic-ai/claude-code..." -ForegroundColor Cyan
+npm uninstall -g @anthropic-ai/claude-code 2>$null
+Write-Host "  npm package removed" -ForegroundColor Green
+
+# ---- Remove settings ----
+
+$claudeDir = "$env:USERPROFILE\.claude"
+if (Test-Path $claudeDir) {
+    Write-Host "  Removing $claudeDir..." -ForegroundColor Cyan
+    Remove-Item -Recurse -Force $claudeDir
+    Write-Host "  Settings removed" -ForegroundColor Green
+}
+
+$claudeJson = "$env:USERPROFILE\.claude.json"
+if (Test-Path $claudeJson) {
+    Remove-Item -Force $claudeJson
+    Write-Host "  Removed .claude.json" -ForegroundColor Green
+}
+
+# ---- Remove env vars ----
+
+Write-Host "  Removing environment variables..." -ForegroundColor Cyan
+[System.Environment]::SetEnvironmentVariable("ANTHROPIC_API_KEY", $null, "User")
+[System.Environment]::SetEnvironmentVariable("ANTHROPIC_BASE_URL", $null, "User")
+[System.Environment]::SetEnvironmentVariable("CLAUDE_CODE_USE_BEDROCK", $null, "User")
+Remove-Item Env:ANTHROPIC_API_KEY -ErrorAction SilentlyContinue
+Remove-Item Env:ANTHROPIC_BASE_URL -ErrorAction SilentlyContinue
+Write-Host "  Env vars removed" -ForegroundColor Green
+
+# ---- Remove npm registry config ----
+
+Write-Host "  Removing npm registry config..." -ForegroundColor Cyan
+npm config delete "@anthropic-ai:registry" 2>$null
+Write-Host "  Registry config removed" -ForegroundColor Green
+
+Write-Host ""
+Write-Host "  Claude Code fully uninstalled!" -ForegroundColor Green
+Write-Host ""

claude/uclaude_uninstall.sh

@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+# Claude Code — Uninstaller
+# Removes Claude Code CLI, settings, env vars, and npm registry config.
+#
+# Usage: sudo bash uclaude_uninstall.sh
+set -euo pipefail
+
+GREEN="\033[92m"
+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 "  |    Claude Code — Uninstaller         |"
+echo "  +--------------------------------------+"
+echo -e "${RESET}"
+
+# ---- Uninstall npm package ----
+
+if npm list -g @anthropic-ai/claude-code &>/dev/null 2>&1; then
+    info "Removing @anthropic-ai/claude-code..."
+    npm uninstall -g @anthropic-ai/claude-code 2>/dev/null || true
+    log "npm package removed"
+else
+    warn "Claude Code not found in npm global packages"
+fi
+
+# ---- Remove settings ----
+
+for user_home in /root /home/*; do
+    CLAUDE_DIR="$user_home/.claude"
+    if [ -d "$CLAUDE_DIR" ]; then
+        info "Removing $CLAUDE_DIR..."
+        rm -rf "$CLAUDE_DIR"
+        log "Removed $CLAUDE_DIR"
+    fi
+    CLAUDE_JSON="$user_home/.claude.json"
+    if [ -f "$CLAUDE_JSON" ]; then
+        rm -f "$CLAUDE_JSON"
+        log "Removed $CLAUDE_JSON"
+    fi
+done
+
+# ---- Remove env vars from shell rc files ----
+
+for user_home in /root /home/*; do
+    for rc_file in "$user_home/.bashrc" "$user_home/.zshrc"; do
+        if [ -f "$rc_file" ] && grep -q 'ANTHROPIC_API_KEY\|CLAUDE_CODE\|Claude Code\|ANTHROPIC_BASE_URL' "$rc_file" 2>/dev/null; then
+            info "Cleaning env vars from $rc_file..."
+            sed -i '/# Claude Code/d' "$rc_file"
+            sed -i '/# UnlimitedCoding.*[Cc]laude/d' "$rc_file"
+            sed -i '/ANTHROPIC_API_KEY/d' "$rc_file"
+            sed -i '/ANTHROPIC_BASE_URL/d' "$rc_file"
+            sed -i '/CLAUDE_CODE/d' "$rc_file"
+            log "Cleaned $rc_file"
+        fi
+    done
+done
+
+# ---- Remove /etc/profile.d script ----
+
+for f in /etc/profile.d/claude-code.sh /etc/profile.d/claude_code.sh; do
+    if [ -f "$f" ]; then
+        rm -f "$f"
+        log "Removed $f"
+    fi
+done
+
+# ---- Remove env vars from /etc/environment ----
+
+if [ -f "/etc/environment" ] && grep -q 'ANTHROPIC_API_KEY\|ANTHROPIC_BASE_URL\|CLAUDE_CODE' /etc/environment 2>/dev/null; then
+    info "Cleaning /etc/environment..."
+    sed -i '/ANTHROPIC_API_KEY/d' /etc/environment
+    sed -i '/ANTHROPIC_BASE_URL/d' /etc/environment
+    sed -i '/CLAUDE_CODE/d' /etc/environment
+    log "Cleaned /etc/environment"
+fi
+
+# ---- Remove npm registry config ----
+
+info "Removing npm registry config..."
+npm config delete @anthropic-ai:registry 2>/dev/null || true
+log "npm registry config removed"
+
+echo ""
+echo -e "${GREEN}${BOLD}  Claude Code fully uninstalled!${RESET}"
+echo ""