layout: every pane open/close resizes exactly ONE sibling — never the whole column. Buggy paths fixed: Alt-n inserted a weight-1 shell (whole column reflowed) — now splitBelow the active pane; stackDocLeft (file/image/tutor open with no doc yet) gave the doc a fair share (every pane shrank) — now it halves only the old top pane's slot; ttyForDir (execute from a file pane) appended a weight-1 shell to the rightmost column — now splitBelow its bottom pane; Alt-c moved a pane out without absorbVWeight (all old siblings grew) — now the sibling above absorbs first. Underneath: splitBelow/absorbVWeight/stackDocLeft snap the whole column's weights to on-screen row counts, because computeGeom's per-pane round(avail*w/vsum) let fractional weights jiggle bystanders by a row; evictLonePristineTty recomputes geometry first (a just-stacked doc has no rect). New snap tests layout-open + layout-close cover Alt-n, doc stacking, ttyForDir, Alt-c, tag Del, pty EOF, and column-width handoff. Six goldens regenerated (fileedit, images, look-file, syntax, tutor, windowops): they had frozen the fair-share/append reflow this change removes; every diff is only the doc/split pane sizing, with untouched panes' boundaries restored bit-identical (e.g. bottom pane tag back at its boot row 17 instead of pushed to 22).

1 files changed, 23 insertions, 23 deletions

diff --git a/test/snapshots/syntax.golden b/test/snapshots/syntax.golden
index 310d6d64..80ef3525 100644
--- a/test/snapshots/syntax.golden
+++ b/test/snapshots/syntax.golden
@@ -6,24 +6,24 @@
 |     3     var x: u32 = 42;
 |     4     _ = x;
 |     5 }
+|╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
+|  nm /tmp/pardes-snap/syntax/cwd Del
 |
+|  demo.zig
 |
 |
 |
+|    demo.zig
+|
 |  nm /tmp/pardes-snap/syntax/cwd Del
 |
 |  demo.zig
 |
 |
 |
-|    demo.zig
 |
 |
 |
-|  nm /tmp/pardes-snap/syntax/cwd Del
-|
-|  demo.zig
-|
 |
 |
 |
@@ -38,20 +38,20 @@
 |5: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |6: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |7: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|8: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|9: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|10: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|11: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|8: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|9: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|10: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|11: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |12: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |13: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |14: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |15: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|16: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|16: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
 |17: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |18: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |19: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |20: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|21: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|21: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |22: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |23: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |24: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
@@ -69,20 +69,20 @@
 |5: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |6: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |7: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|8: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|9: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|10: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|11: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|8: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|9: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|10: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|11: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |12: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |13: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |14: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |15: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|16: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|16: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
 |17: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |18: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |19: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |20: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|21: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|21: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |22: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |23: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |24: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
@@ -100,20 +100,20 @@
 |5: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |6: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |7: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|8: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|9: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|10: 0-1 d,#525252, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|11: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|8: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|9: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|10: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|11: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |12: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |13: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |14: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |15: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|16: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|16: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
 |17: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |18: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |19: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |20: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|21: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|21: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |22: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |23: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |24: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,