i18n: the find box, sort and filter builders and password toggle in Chinese

The find counts, toggles, replace buttons, the builders' add, join and
direction labels, the filter tests and the password tooltip read the
builtin catalog. Test::label becomes Test::key, the choice's value; its
label is the catalog's. The shipped-copy scan checks button, segment and
match-arm text on every match, and zh-CN render tests cover both.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/forms/input.rs

@@ -199,11 +199,15 @@ impl RenderOnce for PasswordInput {
                     },
                 )
                 .size(ControlSize::Sm)
-                .tooltip(if masked {
-                    "Show password"
-                } else {
-                    "Hide password"
-                })
+                .tooltip(i18n::text(
+                    cx,
+                    if masked {
+                        "input.show_password"
+                    } else {
+                        "input.hide_password"
+                    },
+                    &[],
+                ))
                 .on_click(move |_, _, cx| {
                     toggle.update(cx, |input, cx| {
                         let masked = input.is_masked();