pulsar-mouse: make the per-state widget colors configurable (#336)

* pulsar-mouse: make the per-state widget colors configurable

Both widgets hardcoded their state colors: error for a fault, secondary
while charging, error at the mouse's low-power threshold. The desktop
widget's one `color` setting only covered the normal state, and the bar
widget had no color setting at all.

Expose all four states (normal/charging/low/error) as `type = "color"`
settings on each widget, in the same shape battery-widget uses. Defaults
reproduce exactly what was hardcoded, so an existing install renders
identically until someone changes one.

The new settings are `advanced`; the desktop widget's pre-existing
`color` stays where it was so it does not disappear behind the toggle
for anyone already using it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* pulsar-mouse: rename the bar's normal-state key to normal_color

A bar widget's plugin settings share one TOML table with Noctalia's own
per-widget presentation settings, where `color` already exists ("Color
role for this widget's icon and label"). A plugin declaring `color`
there does not shadow it, it aliases it - one `color = "primary"` under
[widget.<id>] drove both pickers at once, so setting either silently
moved the other.

Renamed to `normal_color`, which also makes the retest unambiguous: the
glyph follows the plugin setting while Presentation's own Color picker
stays on Default.

The desktop widget keeps plain `color` - no clash there, and renaming it
would break existing configs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

pulsar-mouse/desktop.luau

@@ -25,6 +25,11 @@ local LOW_POWER_DEFAULT = 15 -- used when the driver has no low-power-threshold
                               -- getter (e.g. nordic.py) or it hasn't been read yet
 
 local color = noctalia.getConfig("color")
+-- The other three states. Defaulted in plugin.toml to the values these were
+-- previously hardcoded to, so an existing install renders identically.
+local chargingColor = noctalia.getConfig("charging_color")
+local warningColor = noctalia.getConfig("warning_color")
+local errorColor = noctalia.getConfig("error_color")
 local showProgress = noctalia.getConfig("show_progress")
 local showPercent = noctalia.getConfig("show_percent")
 local glyphSize = noctalia.getConfig("glyph_size")
@@ -38,13 +43,13 @@ local checkingCli = false
 
 local function statusColor()
   if errorText ~= nil then
-    return "error"
+    return errorColor
   end
   if charging then
-    return "secondary"
+    return chargingColor
   end
   if percent ~= nil and percent <= (lowPowerThreshold or LOW_POWER_DEFAULT) then
-    return "error"
+    return warningColor
   end
   return color
 end
@@ -77,7 +82,7 @@ local function render()
   if errorText ~= nil then
     -- Diagnostic, not decorative - stays visible even with show_percent off,
     -- since otherwise a broken setup would just silently show a bare glyph.
-    table.insert(rows, ui.label({ key = "status", text = errorText, fontSize = 12, color = "error" }))
+    table.insert(rows, ui.label({ key = "status", text = errorText, fontSize = 12, color = errorColor }))
   elseif showPercent and percent == nil then
     table.insert(rows, ui.label({ key = "status", text = "--", fontSize = 20, color = "outline" }))
   elseif showPercent then