feat(spaceshd): GetConfig/SetConfig handlers with live ConfigChanged broadcast

crates/spaceshd/src/config.rs

@@ -35,6 +35,27 @@ pub struct Config {
 }
 
 impl Config {
+    /// Resolve to a client-facing view, applying defaults and the shell resolver.
+    pub fn to_view(&self) -> spacesh_proto::config_view::ConfigView {
+        spacesh_proto::config_view::ConfigView {
+            default_shell: self.resolved_shell(),
+            font_family: self.terminal.font_family.clone().unwrap_or_else(|| "JetBrains Mono".into()),
+            font_size: self.terminal.font_size.unwrap_or(13).clamp(10, 20),
+            theme: self.appearance.theme.clone().unwrap_or_else(|| "dark".into()),
+            accent: self.appearance.accent.clone().unwrap_or_else(|| "blue".into()),
+        }
+    }
+
+    /// Shell for a plain panel using THIS in-memory config
+    /// (env -> config -> passwd -> $SHELL -> /bin/sh).
+    pub fn resolved_shell(&self) -> String {
+        if let Ok(s) = std::env::var("SPACESH_SHELL") { if !s.is_empty() { return s; } }
+        if let Some(s) = &self.default_shell { if !s.is_empty() { return s.clone(); } }
+        if let Some(s) = login_shell() { return s; }
+        if let Ok(s) = std::env::var("SHELL") { if !s.is_empty() { return s; } }
+        "/bin/sh".into()
+    }
+
     /// Load `~/.spacesh/config.toml`. Any error (missing file, bad TOML) yields defaults.
     pub fn load() -> Self {
         let Ok(dir) = crate::lifecycle::spacesh_dir() else { return Self::default() };
@@ -71,6 +92,8 @@ impl Config {
 /// Order: `SPACESH_SHELL` env → `config.toml` `default_shell` → login shell
 /// from the passwd DB → `$SHELL` → `/bin/sh`. The passwd lookup matters under
 /// launchd, where `$SHELL` is typically absent (so a bash fallback would win).
+// retained for the env-override test and potential startup use
+#[allow(dead_code)]
 pub fn default_shell() -> String {
     if let Ok(s) = std::env::var("SPACESH_SHELL") {
         if !s.is_empty() { return s; }
@@ -158,6 +181,17 @@ mod tests {
         assert!(c.appearance.theme.is_none());
     }
 
+    #[test]
+    fn to_view_applies_defaults_and_clamp() {
+        let mut c = Config::default();
+        c.terminal.font_size = Some(99);
+        let v = c.to_view();
+        assert_eq!(v.font_size, 20);
+        assert_eq!(v.theme, "dark");
+        assert_eq!(v.accent, "blue");
+        assert!(!v.font_family.is_empty());
+    }
+
     #[test]
     fn save_then_reload_round_trips() {
         let dir = std::env::temp_dir().join(format!("spacesh-cfg-save-{}", std::process::id()));