fix: stop the widgets from stalling or raising the draw

Memoize hwmon_dir by chip name so sensor reads no longer popen grep on
every frame, cache misses included. Floor fractional byte counts in
card.human so it cannot raise. Drop the GPU package-temperature row,
which duplicated the headline. Set umask before mkdir in both samplers
so a fresh cache directory is not world-readable. Make render.lua exit
non-zero on a draw error and tolerate an unset HOME.

1 files changed, 2 insertions, 2 deletions

diff --git a/widgets/gpu.lua b/widgets/gpu.lua
index 5f289a0..87e22f3 100644
--- a/widgets/gpu.lua
+++ b/widgets/gpu.lua
@@ -14,9 +14,9 @@ local data = require 'lib.data'
 
 local M = {}
 
--- chip, file, label, warn, crit
+-- chip, file, label, warn, crit. Package (temp2) is the headline above, so it
+-- is not repeated here; these are the rows drawn under it.
 local TEMPS = {
-  { 'xe', 'temp2_input', 'PKG',  75, 85 },
   { 'xe', 'temp3_input', 'VRAM', 80, 90 },
 }