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/bar.luau

@@ -17,9 +17,10 @@
 --
 -- Icon-only (no percentage label): battery level and charging state are
 -- already in the hover tooltip, so a bar-row number would just be the same
--- fact twice. Just the Tabler "mouse-filled" glyph, tinted red by
--- statusColor() same as before, swapping to "mouse-off" for a genuine
--- error/no-mouse state.
+-- fact twice. Just the Tabler "mouse-filled" glyph, tinted per state by
+-- statusColor(), swapping to "mouse-off" for a genuine error/no-mouse state.
+-- Each of those state colors is a setting (normal/charging/low/error),
+-- defaulting to what they were previously hardcoded to.
 --
 -- Signal quality has no synchronous getter (see gui.py's own comment on
 -- this) - it only arrives via an async hidraw event the GUI listens for, so
@@ -57,6 +58,17 @@ local checkingCli = false
 local isVertical = false
 local glyphSize = noctalia.getConfig("glyph_size")
 
+-- Per-state colors, defaulted in plugin.toml to the values these used to be
+-- hardcoded to. Read once here rather than per-render, same as glyph_size -
+-- a settings change reloads the widget anyway.
+--
+-- `normal_color`, not `color` - see plugin.toml for why that name is
+-- unusable on a bar widget.
+local normalColor = noctalia.getConfig("normal_color")
+local chargingColor = noctalia.getConfig("charging_color")
+local warningColor = noctalia.getConfig("warning_color")
+local errorColor = noctalia.getConfig("error_color")
+
 local function statusGlyph(color)
   local name = (errorText ~= nil or percent == nil) and "mouse-off" or "mouse-filled"
   return ui.glyph({ name = name, size = glyphSize, color = color })
@@ -64,15 +76,15 @@ end
 
 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 "on_surface"
+  return normalColor
 end
 
 local function tooltipText()
@@ -98,8 +110,10 @@ local function render()
   local glyph
   if not wireless then
     -- No battery to show, but still clickable - a wired mouse still has
-    -- DPI/lighting controls in the panel, just not the Power tab.
-    glyph = ui.glyph({ name = "mouse-filled", size = glyphSize, color = "on_surface" })
+    -- DPI/lighting controls in the panel, just not the Power tab. Takes the
+    -- normal-state color: there's nothing wrong here, it's just permanently
+    -- the only state this mouse has.
+    glyph = ui.glyph({ name = "mouse-filled", size = glyphSize, color = normalColor })
     barWidget.setTooltip(noctalia.tr("ui.wired"))
   else
     glyph = statusGlyph(statusColor())