docs: cross-platform install/update/uninstall instructions for codex/gemini/qwen

- Add Linux / macOS / Windows PowerShell / Windows CMD sections to all CLI READMEs
- Update product table versions (claude v2.1.112, codex v0.116.0, qwen v0.14.5)
- Make qwen install/update/uninstall scripts macOS-aware (sedi wrapper, launchctl, /Users scan, ~/.zshrc)
- Make gemini uninstall script macOS-aware (matching install/update)
- Fix CRLF line endings in qwen/gemini uninstall scripts

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

qwen/uqwen_install.sh

@@ -14,7 +14,24 @@ REGISTRY_URL="https://npm.sensey24.ru/"
 NPM_SCOPE="@qwen-code"
 NPM_PACKAGE="@qwen-code/qwen-code"
 
-ENV_FILE="/etc/profile.d/qwen-code.sh"
+OS="$(uname -s)"
+IS_MACOS=false
+[ "$OS" = "Darwin" ] && IS_MACOS=true
+
+if $IS_MACOS; then
+    ENV_FILE="/etc/qwen-code-env.sh"
+else
+    ENV_FILE="/etc/profile.d/qwen-code.sh"
+fi
+
+# Cross-platform sed -i (macOS BSD sed requires -i '' while GNU sed uses -i)
+sedi() {
+    if $IS_MACOS; then
+        sed -i '' "$@"
+    else
+        sed -i "$@"
+    fi
+}
 
 GREEN="\033[92m"
 RED="\033[91m"
@@ -211,23 +228,55 @@ info "Setting environment variables..."
 API_KEY=$(python3 -c "import json; print(json.load(open('$INSTALL_DIR/qwen_config.json'))['api_key'])")
 BASE_URL=$(python3 -c "import json; print(json.load(open('$INSTALL_DIR/qwen_config.json'))['base_url'])")
 
-ETC_ENV="/etc/environment"
-for kv in "QWEN_API_KEY=\"$API_KEY\"" "QWEN_BASE_URL=\"$BASE_URL\""; do
-    KEY="${kv%%=*}"
-    if grep -q "^${KEY}=" "$ETC_ENV" 2>/dev/null; then
-        sed -i "s|^${KEY}=.*|${kv}|" "$ETC_ENV"
-    else
-        echo "$kv" >> "$ETC_ENV"
-    fi
-done
-log "Env vars written to $ETC_ENV"
+if $IS_MACOS; then
+    # macOS: no /etc/environment, no /etc/profile.d
+    launchctl setenv QWEN_API_KEY "$API_KEY" 2>/dev/null || true
+    launchctl setenv QWEN_BASE_URL "$BASE_URL" 2>/dev/null || true
+    log "Env vars set via launchctl"
 
-cat > "$ENV_FILE" << PROF_EOF
+    cat > "$ENV_FILE" << ENVEOF
+export QWEN_API_KEY="$API_KEY"
+export QWEN_BASE_URL="$BASE_URL"
+ENVEOF
+    chmod 644 "$ENV_FILE"
+    log "Env file: $ENV_FILE"
+
+    # Add source to user shell rc files
+    REAL_HOME="$HOME"
+    if [ -n "${SUDO_USER:-}" ] && [ "$SUDO_USER" != "root" ]; then
+        REAL_HOME=$(eval echo "~$SUDO_USER")
+    fi
+    for rc_file in "$REAL_HOME/.zshrc" "$REAL_HOME/.bashrc"; do
+        if [ -f "$rc_file" ] || [ "$rc_file" = "$REAL_HOME/.zshrc" ]; then
+            if [ -f "$rc_file" ]; then
+                sedi '/# Qwen env/d' "$rc_file"
+                sedi '/qwen-code-env\.sh/d' "$rc_file"
+            fi
+            echo "[ -f $ENV_FILE ] && . $ENV_FILE  # Qwen env" >> "$rc_file"
+            log "Added source to $rc_file"
+        fi
+    done
+else
+    # Linux: /etc/environment for all users
+    ETC_ENV="/etc/environment"
+    for kv in "QWEN_API_KEY=\"$API_KEY\"" "QWEN_BASE_URL=\"$BASE_URL\""; do
+        KEY="${kv%%=*}"
+        if grep -q "^${KEY}=" "$ETC_ENV" 2>/dev/null; then
+            sedi "s|^${KEY}=.*|${kv}|" "$ETC_ENV"
+        else
+            echo "$kv" >> "$ETC_ENV"
+        fi
+    done
+    log "Env vars written to $ETC_ENV"
+
+    mkdir -p /etc/profile.d
+    cat > "$ENV_FILE" << PROF_EOF
 export QWEN_API_KEY="$API_KEY"
 export QWEN_BASE_URL="$BASE_URL"
 PROF_EOF
-chmod 644 "$ENV_FILE"
-log "Env file: $ENV_FILE"
+    chmod 644 "$ENV_FILE"
+    log "Env file: $ENV_FILE"
+fi
 
 # ---- Create wrapper (auto-loads env) ----