redbear-power: show live process filter input in keybar

Mirror the local process_filter_input buffer into App so render_keybar can display it. While filtering, the keybar shows "Filter: <buffer>  (N matches)  Enter:apply  Esc:clear  ↑↓:select" in a warm style instead of the normal hints. Build, 224 tests, clippy, and fmt clean.

local/recipes/system/redbear-power/source/src/app.rs

@@ -251,6 +251,7 @@ pub struct App {
     pub toast_expires: Option<std::time::Instant>,
     pub bench_line: String,
     pub interval_input: Option<String>,
+    pub process_filter_input: Option<String>,
     pub current_tab: TabId,
     pub bench_start_time: Option<Instant>,
     pub collector_stats: crate::collector::CollectorStats,
@@ -432,6 +433,7 @@ impl App {
             toast_expires: None,
             bench_line: String::new(),
             interval_input: None,
+            process_filter_input: None,
             current_tab: TabId::PerCpu,
             bench_start_time: None,
             meminfo: crate::meminfo::read_meminfo(),

local/recipes/system/redbear-power/source/src/main.rs

@@ -420,7 +420,10 @@ fn main() -> io::Result<()> {
         }
         app.interval_input = interval_input.clone();
         if let Some(buf) = process_filter_input.as_ref() {
+            app.process_filter_input = Some(buf.clone());
             app.process_filter = buf.clone();
+        } else {
+            app.process_filter_input = None;
         }
         terminal.draw(|f| {
             let full = f.area();

local/recipes/system/redbear-power/source/src/render.rs

@@ -2122,6 +2122,25 @@ pub fn render_cpu_table<'a>(
 
 pub fn render_keybar<'a>(app: &'a App) -> Paragraph<'a> {
     let theme = &app.theme;
+    if let Some(ref buf) = app.process_filter_input {
+        let line = format!(
+            "Filter: {}  ({} match{})  Enter:apply  Esc:clear  ↑↓:select",
+            if buf.is_empty() {
+                "<type to filter>"
+            } else {
+                buf.as_str()
+            },
+            app.visible_processes().len(),
+            if app.visible_processes().len() == 1 {
+                ""
+            } else {
+                "es"
+            }
+        );
+        return Paragraph::new(line)
+            .style(theme.value_warm)
+            .block(Block::default().borders(Borders::NONE));
+    }
     let gov = format!(" g:{}", app.cpufreq.active.as_str());
     let interval = format!(" [/]:{}ms", app.poll_ms);
     let tab_hints: &str = if app.current_tab == crate::app::TabId::Process {