refactor: zigify imports and correct minor mistakes

examples/demo.zig

@@ -1,11 +1,3 @@
-const std = @import("std");
-const zterm = @import("zterm");
-
-const input = zterm.input;
-const App = zterm.App(union(enum) {});
-
-const log = std.log.scoped(.default);
-
 const QuitText = struct {
     const text = "Press ctrl+c to quit. Press ctrl+n to launch helix.";
 
@@ -158,6 +150,7 @@ pub fn main() !void {
 
                 if (key.eql(.{ .cp = 'n', .mod = .{ .ctrl = true } })) {
                     try app.interrupt();
+                    renderer.size = .{}; // reset size, such that next resize will cause a full re-draw!
                     defer app.start() catch @panic("could not start app event loop");
                     var child = std.process.Child.init(&.{"hx"}, allocator);
                     _ = child.spawnAndWait() catch |err| app.postEvent(.{
@@ -188,10 +181,16 @@ pub fn main() !void {
             else => {},
         }
 
-        try renderer.resize();
-        container.resize(renderer.size);
+        container.resize(try renderer.resize());
         container.reposition(.{});
         try renderer.render(@TypeOf(container), &container);
         try renderer.flush();
     }
 }
+
+const log = std.log.scoped(.default);
+
+const std = @import("std");
+const zterm = @import("zterm");
+const input = zterm.input;
+const App = zterm.App(union(enum) {});