refactor(ui): centralize muted_style in style::common

Delete the byte-identical 0.68 muted_style copies across 13 window modules and import crate::ui::style::common::muted_style instead. print_all keeps its local name via muted_style as muted so call sites are untouched. Divergent alphas (0.60/0.62/0.65/0.72) and missing_fonts weak.text left alone to avoid visual changes. Net: +13 / -78, no visual change. Verified: cargo check --all-targets clean, cargo test --lib ui::style (3 passed).

src/ui/window/plugin_manager.rs

@@ -8,6 +8,7 @@
 
 use crate::app::Message;
 use crate::plugin::external::{ExternalPlugin, RegistryEntry, ReleaseInfo};
+use crate::ui::style::common::muted_style;
 use iced::widget::{
     button, column, container, markdown, row, rule, scrollable, text, text_input, Space,
 };
@@ -48,12 +49,6 @@ inventory::submit!(crate::command::CommandRegistration {
     names: &["PLUGINS", "PLUGINMANAGER"]
 });
 
-fn muted_style(theme: &Theme) -> iced::widget::text::Style {
-    iced::widget::text::Style {
-        color: Some(theme.palette().background.base.text.scale_alpha(0.68)),
-    }
-}
-
 fn primary_style(theme: &Theme) -> iced::widget::text::Style {
     iced::widget::text::Style {
         color: Some(theme.palette().primary.base.color),