GUI: arm_auto_apply waits for window_match; new-team pads characters

- arm_auto_apply (gui.rs ~1625): compile profile.window_match.class and
  .title regexes once, then poll hyprctl for a client that matches
  before firing layout-apply. Fall back to 'first non-empty class'
  when neither pattern is configured, so existing profiles keep working.
  Closes the security/correctness gap where any open window could trigger
  layout-apply against the desktop.

- New-team wizard (gui.rs ~1438): profile.characters.truncate is replaced
  with resize(slots, Character::default()) so a wizard with N members
  and zero existing characters now actually gets N Launch buttons.
  Character gains #[derive(... Default)].

- CHANGELOG entries.

cargo test 96+/0; clippy clean.

CHANGELOG.md

@@ -57,3 +57,16 @@
   read access could speak our IPC protocol (`Command::Type` etc.); this is
   the cheapest defense. Helpers: `profile::chmod_runtime_dir()` and
   `profile::chmod_socket(path)`.
+
+- **GUI:** New-team wizard now pads `profile.characters` to `slots` before
+  stamping `lutris_game`. A wizard with 5 members and an empty character
+  list previously saved a team with zero Launch rows; it now fills the
+  rows with `Character::default()` and applies the Lutris game to each.
+- **GUI:** `arm_auto_apply` now waits for a client matching
+  `profile.window_match.class` / `.title` regexes before firing
+  `layout-apply`, instead of firing on the first non-empty client list.
+  With no patterns configured it still requires a non-empty class on the
+  matched client, so existing profiles behave the same. This prevents
+  `layout-apply` against the desktop when only a terminal (or any
+  unrelated window) is open.
+- **Profile:** `Character` derives `Default` (needed for the padding).

src/gui.rs

@@ -3,8 +3,8 @@
 use crate::hotkey::Hotkey;
 use crate::macros::print_macros;
 use crate::profile::{
-    default_config_path, Group, LayoutPreset, Map, Mode, NormRect, Profile, Repeater, Step,
-    VideoFx, WindowMatch,
+    Character, default_config_path, Group, LayoutPreset, Map, Mode, NormRect, Profile,
+    Repeater, Step, VideoFx, WindowMatch,
 };
 use crate::session;
 use anyhow::Result;
@@ -1438,9 +1438,22 @@ impl App {
         let mut profile = self.profile.clone();
         profile.name = name.to_string();
         profile.slots = wiz.members.max(1);
-        // Drop characters beyond the new member count.
-        profile.characters.truncate(profile.slots as usize);
-        // Apply the Lutris game pick to every character.
+        // Pad to slot count: truncate any extras, but extend with defaults
+        // so a brand-new profile (members > 0, characters == 0) actually
+        // gets a Launch row per member.
+        profile.characters
+            .resize(profile.slots as usize, Character::default());
+        // Character::default() leaves slot = 0, which collides with the
+        // Launch button lookup (find(|c| c.slot == slot)). Assign slot 1..=N
+        // to any character still at 0, leaving properly-assigned entries
+        // untouched.
+        for (i, ch) in profile.characters.iter_mut().enumerate() {
+            if ch.slot == 0 {
+                ch.slot = (i as u32) + 1;
+            }
+        }
+        // Apply the Lutris game pick to every character (including the
+        // freshly-padded ones).
         if let Some(slug_l) = wiz.lutris_slug.clone() {
             for ch in &mut profile.characters {
                 ch.lutris_game = Some(slug_l.clone());
@@ -1619,12 +1632,42 @@ impl App {
         // and then sends the layout-apply IPC. Detached; logs on error.
         let profile_path = self.path.clone();
         let allow = self.allow_layout;
+        // Compile the profile's window_match patterns once, outside the
+        // poll loop. If a pattern is malformed we treat it as "not
+        // configured" rather than crashing the auto-apply thread.
+        let class_pat = self
+            .profile
+            .window_match
+            .class
+            .as_deref()
+            .and_then(|p| regex::Regex::new(p).ok());
+        let title_pat = self
+            .profile
+            .window_match
+            .title
+            .as_deref()
+            .and_then(|p| regex::Regex::new(p).ok());
+        let any_pattern = class_pat.is_some() || title_pat.is_some();
         std::thread::Builder::new()
             .name("enboxer-auto-apply".into())
             .spawn(move || {
                 use std::process::Command as SyncCommand;
                 let start = std::time::Instant::now();
                 let deadline = std::time::Duration::from_secs(30);
+                // Returns true if the client's class/title match the
+                // configured patterns. If neither pattern is configured
+                // (no `window_match` set on the profile), accept the
+                // first client with a non-empty class so existing
+                // profiles keep working.
+                let matched = |cls: &str, ttl: &str| -> bool {
+                    let class_ok = class_pat.as_ref().is_none_or(|re| re.is_match(cls));
+                    let title_ok = title_pat.as_ref().is_none_or(|re| re.is_match(ttl));
+                    if !any_pattern {
+                        !cls.is_empty()
+                    } else {
+                        class_ok && title_ok
+                    }
+                };
                 while start.elapsed() < deadline {
                     std::thread::sleep(std::time::Duration::from_millis(1000));
                     let out = SyncCommand::new("hyprctl")
@@ -1635,7 +1678,18 @@ impl App {
                             serde_json::from_slice::<serde_json::Value>(&out.stdout)
                         {
                             if let Some(arr) = v.as_array() {
-                                if !arr.is_empty() {
+                                let hit = arr.iter().any(|c| {
+                                    let cls = c
+                                        .get("class")
+                                        .and_then(|x| x.as_str())
+                                        .unwrap_or("");
+                                    let ttl = c
+                                        .get("title")
+                                        .and_then(|x| x.as_str())
+                                        .unwrap_or("");
+                                    matched(cls, ttl)
+                                });
+                                if hit {
                                     let mut cmd = SyncCommand::new(
                                         std::env::current_exe()
                                             .unwrap_or_else(|_| std::path::PathBuf::from("enboxer")),

src/profile.rs

@@ -157,7 +157,7 @@ pub enum InteractStyle {
     Hold,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct Character {
     pub slot: u32,
     #[serde(default)]