fix(profile): reject digit-leading names; pass --profile to autostart

Digit-leading profiles (e.g. '1work') pass the alphanumeric check but
produce invalid D-Bus well-known-name elements on Linux, preventing
single-instance registration and startup.  Fix: require the first char
to be a letter (is_ascii_alphabetic).

Autostart did not preserve the selected profile: the OS login item was
registered without arguments, so every relaunch resolved to 'default'.
Fix: pass ['--profile', name] to tauri_plugin_autostart::init when the
active profile is not 'default'.

Addresses Greptile P1 findings on PR #241.

Author: TimeToBuildBob

src-tauri/src/lib.rs

@@ -937,7 +937,13 @@ pub fn run() {
         .plugin(tauri_plugin_dialog::init())
         .plugin(tauri_plugin_autostart::init(
             MacosLauncher::AppleScript,
-            Some(vec![]),
+            // Pass --profile so the OS login item relaunches the selected
+            // profile, not always `default`.
+            if profile::is_default(&cli_args.profile) {
+                Some(vec![])
+            } else {
+                Some(vec!["--profile", cli_args.profile.as_str()])
+            },
         ))
         .plugin(single_instance_plugin(&cli_args.profile))
         // Serve the module-alert HTML with a valid Origin for the webview.

src-tauri/src/profile.rs

@@ -29,9 +29,9 @@ pub fn validate_profile(name: &str) -> Result<(), String> {
         ));
     }
     let first = name.chars().next().unwrap();
-    if !first.is_ascii_alphanumeric() {
+    if !first.is_ascii_alphabetic() {
         return Err(format!(
-            "profile name must start with a letter or digit, got '{first}'"
+            "profile name must start with a letter, got '{first}'"
         ));
     }
     for c in name.chars() {
@@ -160,7 +160,14 @@ mod tests {
             validate_profile("Research").is_err(),
             "uppercase should be rejected"
         );
-        assert!(validate_profile("-bad").is_err(), "must start with alnum");
+        assert!(
+            validate_profile("-bad").is_err(),
+            "must start with a letter"
+        );
+        assert!(
+            validate_profile("1work").is_err(),
+            "digit-leading profiles produce invalid D-Bus names"
+        );
         assert!(validate_profile("bad name").is_err(), "spaces not allowed");
         assert!(
             validate_profile("a/b").is_err(),