Slop cleanup

SPEC.md

@@ -198,7 +198,7 @@ List sessions, most recent first.
 
 ---
 
-#### `PUT /api/sessions/{id}`
+#### `PATCH /api/sessions/{id}`
 
 Update start_time, end_time, or notes on any session.
 
@@ -393,10 +393,11 @@ A small gear icon opens an inline settings popover to change `dayStart` / `dayEn
 #### `SleepTimetable`
 
 A grid where:
-- Rows = days (newest at top)
-- Columns = 15-minute slots across 24 hours (96 columns)
-- Each cell is a small coloured square: sleeping = navy, awake = light grey
-- X-axis labels: 00:00, 03:00, 06:00 … 21:00
+- Rows = hours of the day (00:00 at top, 23:00 at bottom — 24 rows)
+- Columns = days in the selected interval (newest on the right)
+- Each cell is a small coloured square: sleeping = green (`bg-green-500`), awake = light grey (`bg-gray-50`)
+- Column headers: short weekday name per day
+- A red horizontal line marks the current time of day
 - Scrollable horizontally on mobile
 
 #### `WakeupPlot` and `BedtimePlot`