feat: the cache and slackware cards move to quickshell

Both cards are now drawn by quickshell, so the conky copies go: the two
widgets, their samplers and texeci lines, their fixtures and icons, and
du_parse with human_bytes, which only the cache card used. kv_parse stays
for breaktimer; its test now runs on an inline string. README gains a
Samplers section listing what conky still schedules, and DESIGN.md's
examples point at the cards that remain. Their slots in the layout are
left open.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/DESIGN.md b/DESIGN.md
index cd7a8a5..604e7cb 100644
--- a/DESIGN.md
+++ b/DESIGN.md
@@ -20,7 +20,7 @@ bottom:
 - **Variable band.** One element may absorb the height left over, chosen per
   card: the daylight arc in `weather`. Or the type itself fills the cell.
 
-Failure states keep the chrome and draw a notice in it ("no cache data", `--`
+Failure states keep the chrome and draw a notice in it ("no calendar data", `--`
 for a missing sensor). An empty cell is indistinguishable from a crashed
 widget, so a card never draws nothing. A missing sensor is `--`, never `0`:
 zero is a legitimate reading.
@@ -38,7 +38,7 @@ Everything else exists to keep those two readable at any cell size.
   of a width fit and a height budget. `card.fit_unit` measures candidate rows
   and returns the largest base size that fits the width, and a row that would
   collide pulls the size down. Bigger cell, bigger type instead of empty space.
-  The `cache` card does this; a card that cannot afford the
+  The `breaktimer` card does this; a card that cannot afford the
   measuring pass may key off width with a clamped factor.
 - **Roles.** `FONT_MONO` for labels and row text, `FONT_HEAVY` for the big
   number, `FONT_UI` for prose (a condition description, a notice). Sizes within
@@ -52,11 +52,11 @@ One language for every measured quantity, so state is read rather than decoded:
 
 | State | Role | Example |
 |---|---|---|
-| fine | `ok` | a fresh cache, a current changelog |
-| busy | `warning` | a cache past 25% |
-| hot / full | `critical` | a cache past 75%, a stale changelog |
+| fine | `ok` | breaktimer working |
+| busy | `warning` | breaktimer paused |
+| hot / full | `critical` | a quantity past its upper threshold |
 
-- Proportions (cache usage) use **25% / 75%**.
+- Proportions use **25% / 75%**.
 - `warning` is the palette's middle role. The board should show all three
   states in normal use, or the language is not earning its place.
 - The big value's colour follows what it is: `body` for a plain number, the