redbear-power: clear PkgW status, remove redundant per-CPU PkgW column

- app.rs: rapl_status field shows 'n/a (run as root)' or
  'n/a (unsupported)' or 'sampling...' depending on state
- render.rs: header PkgW shows rapl_status when unavailable;
  removed per-CPU PkgW column (package power is socket-wide)

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

@@ -153,6 +153,8 @@ pub meminfo: crate::meminfo::MemInfo,
     pub pkg_power_w: Option<f64>,
     /// Previous RAPL energy reading for delta computation.
     rapl_prev: Option<(u64, std::time::Instant)>,
+    /// Why RAPL package power is unavailable (empty if working).
+    pub rapl_status: String,
     /// Per-PID IO rate history (normalized KiB/s samples,
     /// 0..=255 against the per-history max). Used by the
     /// Process tab to render a small sparkline per process.
@@ -395,6 +397,7 @@ impl App {
             folded: std::collections::BTreeSet::new(),
             pkg_power_w: None,
             rapl_prev: None,
+            rapl_status: "probing...".into(),
             io_history: std::collections::BTreeMap::new(),
             last_clicked_cpu: None,
             sort_ascending: false,
@@ -662,10 +665,19 @@ impl App {
                 self.rapl_prev = Some(next);
                 if w > 0.0 {
                     self.pkg_power_w = Some(w);
+                    self.rapl_status.clear();
                 }
             } else {
                 self.rapl_prev = Some(curr);
+                self.rapl_status = "sampling...".into();
             }
+        } else if self.msr_available {
+            // MSR device exists but we can't read it (permission denied).
+            // RAPL sysfs also needs root on Linux.
+            self.rapl_status = "n/a (run as root)".into();
+        } else {
+            // No MSR device at all — RAPL unsupported (QEMU, old CPU).
+            self.rapl_status = "n/a (unsupported)".into();
         }
         // Re-read cpufreq state (catches external governor changes).
         self.cpufreq.refresh();

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

@@ -9,7 +9,7 @@
 //!   │  MSR / Daemons /    │ │  ...        │
 //!   └─────────────────────┘ └────────────┘
 //!   ┌─ Per-CPU ───────────────┐
-//!   │  CPU  Freq  PkgW  Temp  │
+//!   │  CPU  Freq  Temp  │
 //!   │   0  2400  15.0  72▏▌·· │
 //!   │   1  2400  15.0  70▏▎·· │
 //!   └────────────────────────┘
@@ -180,8 +180,8 @@ pub fn render_header<'a>(app: &'a App, focused: bool) -> Paragraph<'a> {
             "PkgW: ".set_style(theme::LABEL),
             app.pkg_power_w
                 .map(|w| format!("{w:.1} W"))
-                .unwrap_or_else(|| "n/a".into())
-                .set_style(theme::VALUE),
+                .unwrap_or_else(|| app.rapl_status.clone())
+                .set_style(if app.pkg_power_w.is_some() { theme::VALUE } else { theme::VALUE_OFF }),
             "    ".into(),
             "P-state source: ".set_style(theme::LABEL),
             app.pss_source.as_str().into(),
@@ -1407,7 +1407,6 @@ pub fn render_cpu_table<'a>(
     let header = Row::new(vec![
         "CPU".set_style(theme::LABEL),
         "Freq/MHz".set_style(theme::LABEL),
-        "PkgW".set_style(theme::LABEL),
         "Temp°C  bar".set_style(theme::LABEL),
         "P-state".set_style(theme::LABEL),
         "State".set_style(theme::LABEL),
@@ -1449,10 +1448,6 @@ pub fn render_cpu_table<'a>(
                 let color = theme::flags_color(cpu.critical, cpu.prochot, cpu.power_limit);
                 Cell::from(flags.clone().set_style(Style::new().fg(color)))
             };
-            let pkgw_cell: Cell = match cpu.current_power_mw {
-                Some(w) => Cell::from(format!("{:.1}", w as f64 / 1000.0).set_style(theme::VALUE)),
-                None => Cell::from("n/a".set_style(theme::VALUE_OFF)),
-            };
             let load_label = format!("{:.0}%", cpu.load_pct);
             let lcolor = theme::load_color(cpu.load_pct);
             let spark_text = if cpu.load_history.is_empty() {
@@ -1468,7 +1463,6 @@ pub fn render_cpu_table<'a>(
             Row::new(vec![
                 Cell::from(format!("{}{}", cpuid::core_type_label(cpu.core_type), cpu.id).set_style(theme::VALUE)),
                 Cell::from(freq.set_style(theme::VALUE)),
-                pkgw_cell,
                 temp_cell,
                 Cell::from(pstate.set_style(theme::VALUE)),
                 Cell::from(cpu.state_label().set_style(theme::VALUE)),