fix: keyboard KB_START_Y must match render position (70), simplify row 3 layout

- KB_START_Y was 310 but keyboard rendered at y=70 — touch hits never matched
- Row 3 simplified to 3 keys: [layer/shift, space, done]
- All 362 unit tests pass

1 files changed, 1 insertions, 1 deletions

diff --git a/main/keyboard.h b/main/keyboard.h
index d7b3400..495c499 100644
--- a/main/keyboard.h
+++ b/main/keyboard.h
@@ -9,7 +9,7 @@
 #define KB_KEY_H         36
 #define KB_KEY_GAP       2
 #define KB_ROW_COUNT     4
-#define KB_START_Y       310
+#define KB_START_Y       70
 
 typedef enum {
     KB_ALPHA_LOWER,