fix: correct path construction in install script

- Fix duplicate .openclaw in env file path
- Use consistent installDir variable throughout
- Fix skills path in OpenClaw config update
- Fix fallback path in uninstall function

install.mjs

@@ -440,16 +440,17 @@ async function configure(env) {
 
   // Create environment config
   log('  Creating environment configuration...', 'blue');
+  const installDir = env.openclawDir || join(homedir(), '.openclaw');
   const envConfig = [
     '# PaddedCell Environment Configuration',
     `export PATH="${dirname(passMgrPath)}:$PATH"`,
     'export PASS_MGR_PATH="pass_mgr"',
     '',
     '# PaddedCell skills',
-    `export PADDEDCELL_SKILLS_DIR="${join(env.openclawDir || homedir(), '.openclaw', 'skills', 'paddedcell')}"`,
+    `export PADDEDCELL_SKILLS_DIR="${join(installDir, 'skills', 'paddedcell')}"`,
   ].join('\n');
 
-  const envFile = join(env.openclawDir || homedir(), '.openclaw', 'paddedcell.env');
+  const envFile = join(installDir, 'paddedcell.env');
   writeFileSync(envFile, envConfig);
   logSuccess(`Environment config written to ${envFile}`);
   
@@ -458,7 +459,7 @@ async function configure(env) {
 
   // Update OpenClaw plugins.load.paths configuration
   log('\n  Updating OpenClaw plugin configuration...', 'blue');
-  const openclawConfigPath = join(env.openclawDir || homedir(), '.openclaw', 'config.json');
+  const openclawConfigPath = join(installDir, 'config.json');
   
   if (existsSync(openclawConfigPath)) {
     try {
@@ -477,7 +478,7 @@ async function configure(env) {
       }
       
       // Add paddedcell skills path if not already present
-      const skillsPath = join(env.openclawDir || homedir(), '.openclaw', 'skills', 'paddedcell');
+      const skillsPath = join(installDir, 'skills', 'paddedcell');
       if (!config.plugins.load.paths.includes(skillsPath)) {
         config.plugins.load.paths.push(skillsPath);
         writeFileSync(openclawConfigPath, JSON.stringify(config, null, 2));
@@ -491,7 +492,7 @@ async function configure(env) {
   } else {
     logWarning(`OpenClaw config not found at ${openclawConfigPath}`);
     log('  Please manually add the following to your OpenClaw config:', 'yellow');
-    log(`    plugins.load.paths: ["${join(env.openclawDir || homedir(), '.openclaw', 'skills', 'paddedcell')}"]`, 'cyan');
+    log(`    plugins.load.paths: ["${join(installDir, 'skills', 'paddedcell')}"]`, 'cyan');
   }
 }
 
@@ -613,7 +614,7 @@ function printSummary(env) {
 async function uninstall(env) {
   logStep(1, 'Uninstalling PaddedCell...');
 
-  const installDir = options.prefix || env.openclawDir;
+  const installDir = options.prefix || env.openclawDir || join(homedir(), '.openclaw');
   const binDir = join(installDir, 'bin');
   const skillsDir = join(installDir, 'skills', 'paddedcell');
   const envFile = join(installDir, 'paddedcell.env');