Exit non-zero on permission denial, throttle restarts to 60s

Permission denied is an error — exit(1) so launchd knows it failed.
KeepAlive=true with ThrottleInterval=60 means launchd retries at most
once per minute. Combined with the 60s in-binary accessibility poll,
the user gets one prompt per ~2 minutes until they grant permission.
With the stable binary path, TCC recognises the same app so the prompt
only appears once.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: danielbodart

dist/install-macos.sh

@@ -86,10 +86,9 @@ $prog_args    </array>
     <key>RunAtLoad</key>
     <true/>
     <key>KeepAlive</key>
-    <dict>
-        <key>SuccessfulExit</key>
-        <false/>
-    </dict>
+    <true/>
+    <key>ThrottleInterval</key>
+    <integer>60</integer>
     <key>StandardOutPath</key>
     <string>$INSTALL_DIR/capsper.log</string>
     <key>StandardErrorPath</key>

src/main.zig

@@ -428,7 +428,7 @@ pub fn main() !void {
                 if (builtin.os.tag == .linux) {
                     std.debug.print("Check: is user in 'input' group? Is /dev/uinput accessible?\n", .{});
                 }
-                return;
+                std.process.exit(1);
             };
             type_callback = .{
                 .context = @ptrCast(&input_handler.?),