Minor improvements

Fixes: https://github.com/sayanarijit/xplr/issues/284
Closes: https://github.com/sayanarijit/xplr/issues/286
Partially fixes: https://github.com/sayanarijit/xplr/issues/285

src/app.rs

@@ -1958,9 +1958,14 @@ impl App {
     }
 
     fn change_directory(mut self, dir: &str, save_history: bool) -> Result<Self> {
-        match env::set_current_dir(dir) {
+        let mut dir = PathBuf::from(dir);
+        if dir.is_relative() {
+            dir = PathBuf::from(self.pwd()).join(dir);
+        }
+
+        match env::set_current_dir(&dir) {
             Ok(()) => {
-                self.pwd = dir.to_owned();
+                self.pwd = dir.to_string_lossy().to_string();
                 if save_history {
                     self.history = self.history.push(format!("{}/", self.pwd));
                 }

src/lua.rs

@@ -8,7 +8,7 @@ use serde::Deserialize;
 use std::fs;
 
 const DEFAULT_LUA_SCRIPT: &str = include_str!("init.lua");
-const UPGRADE_GUIDE_LINK: &str = "https://github.com/sayanarijit/xplr/wiki/Upgrade-Guide";
+const UPGRADE_GUIDE_LINK: &str = "https://arijitbasu.in/xplr/en/upgrade-guide.html";
 
 fn parse_version(version: &str) -> Result<(u16, u16, u16, Option<u16>)> {
     let mut configv = version.split('.');

src/runner.rs

@@ -106,12 +106,15 @@ pub struct Runner {
 
 impl Runner {
     pub(crate) fn new(path: Option<PathBuf>) -> Result<Self> {
-        let mut pwd = path.unwrap_or_else(|| ".".into()).canonicalize()?;
+        let basedir = std::env::current_dir()?;
+        let mut pwd = path
+            .map(|p| if p.is_relative() { basedir.join(p) } else { p })
+            .unwrap_or_else(|| basedir.clone());
         let mut focused_path = None;
 
         if pwd.is_file() {
             focused_path = pwd.file_name().map(|p| p.into());
-            pwd = pwd.parent().map(|p| p.into()).unwrap_or_else(|| ".".into());
+            pwd = pwd.parent().map(|p| p.into()).unwrap_or(basedir);
         }
 
         Ok(Self {