refactor: unify card no-data face and fluid sizing

Extract card.notice so every cached card's no-data state is one fluid,
theme-consistent face instead of a copy per widget, and delete the
fixed-size card.label it replaces.

Derive weather's arc geometry from its band (pad, curve room, sun dot,
time labels) instead of fixed pixels, and cap the arc at a proportion of
the card's width rather than 240px.

Derive disks' bar-fallback height and its address type from the card's
own label scale.

Standardise the big-value factor to 1.0 across the fit_unit cards and
document the big-value colour rule and the disks headline exception.

1 files changed, 10 insertions, 11 deletions

diff --git a/widgets/disks.lua b/widgets/disks.lua
index 3b0f221..fa97b50 100644
--- a/widgets/disks.lua
+++ b/widgets/disks.lua
@@ -43,20 +43,16 @@ function M.draw(cr, rect, colors)
   local function clamp(v, lo, hi) return math.max(lo, math.min(hi, v)) end
   local label_size = clamp(inner.w * 0.030, 10, 16)
 
-  card.font(cr, card.FONT_MONO, label_size, false)
-  card.rgba(cr, colors.label)
-  card.text(cr, inner.x, inner.y + label_size, 'DISKS')
-
   local fs = data.df_parse(data.slurp(CACHE) or '')
   if #fs == 0 then
-    card.rgba(cr, colors.label)
-    card.font(cr, card.FONT_UI, label_size * 1.2, true)
-    card.text(cr, inner.x, inner.y + label_size * 3.4, 'no disk data')
-    card.font(cr, card.FONT_MONO, label_size, false)
-    card.text(cr, inner.x, inner.y + label_size * 5, 'bin/disks-sample.sh')
+    card.notice(cr, inner, colors, 'DISKS', 'no disk data', 'bin/disks-sample.sh')
     return
   end
 
+  card.font(cr, card.FONT_MONO, label_size, false)
+  card.rgba(cr, colors.label)
+  card.text(cr, inner.x, inner.y + label_size, 'DISKS')
+
   local top = inner.y + label_size * 2.2
   local avail_h = (inner.y + inner.h) - top
 
@@ -100,7 +96,9 @@ function M.draw(cr, rect, colors)
       -- The address, inside the ring beneath the glyph. Only the NFS shares
       -- have one; the local mounts are identified by their icon alone.
       if sub then
-        card.font(cr, card.FONT_MONO, clamp(r * 0.20, 9, 12), false)
+        -- Tied to the card's own label scale rather than a fixed px floor, so
+        -- every piece of small mono text on the card tracks the same size.
+        card.font(cr, card.FONT_MONO, clamp(r * 0.20, label_size * 0.7, label_size), false)
         card.rgba(cr, colors.label)
         local sw_ = card.measure(cr, sub)
         card.text(cr, cx - sw_ / 2, cy + r * 0.55, sub)
@@ -129,6 +127,7 @@ function M.draw(cr, rect, colors)
     end
   else
     local step = label_size * 2.6
+    local bar_h = clamp(label_size * 0.5, 4, 8)
     local ey = top + label_size
     for _, e in ipairs(fs) do
       if ey + step > inner.y + inner.h then break end
@@ -143,7 +142,7 @@ function M.draw(cr, rect, colors)
       card.rgba(cr, colour)
       card.text_right(cr, inner.x + inner.w, ey,
         string.format('%s / %s', card.human(e.used), card.human(e.size)))
-      card.bar(cr, inner.x, ey + 6, inner.w, 6, e.pct / 100, colour, colors)
+      card.bar(cr, inner.x, ey + label_size * 0.5, inner.w, bar_h, e.pct / 100, colour, colors)
       ey = ey + step
     end
   end