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, 14 insertions, 14 deletions

diff --git a/test/snapshots/look-file.golden b/test/snapshots/look-file.golden
index 4f6d4a71..9258cfdb 100644
--- a/test/snapshots/look-file.golden
+++ b/test/snapshots/look-file.golden
@@ -6,10 +6,7 @@
 |    42 line 42
 |    43 line 43
 |    44 line 44
-|    45 line 45
-|    46 line 46
-|    47 line 47
-|    48 line 48
+|╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
 |  nm /tmp/pardes-snap/look-file/cwd Del
 |
 |  big.txt
@@ -18,8 +15,6 @@
 |
 |    big.txt:40
 |
-|
-|
 |  nm /tmp/pardes-snap/look-file/cwd Del
 |
 |  big.txt
@@ -29,29 +24,34 @@
 |
 |
 |
+|
+|
+|
+|
+|
 == style file-open
 |0: 0-44 #969696,#2c2a3e, 45-99 d,#2c2a3e,
 |1: 0-1 d,#6e4fd0, 2-49 #969696,#2c2a3e, 50-51 d,#383c54, 52-88 #969696,#2c2a3e, 89-99 d,#2c2a3e,
 |2: 0-1 d,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |3: 0-1 d,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |4: 0-1 d,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|5: 0-1 d,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|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,#2a2a2a, 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,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|9: 0-1 d,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|10: 0-1 d,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|11: 0-1 d,#383c54, 2-38 #969696,#2c2a3e, 39-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|7: 0-1 d,#2a2a2a, 2-6 #5a5a5a,d, 7-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|8: 0-1 d,#383c54, 2-38 #969696,#2c2a3e, 39-49 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, 2-38 #969696,#2c2a3e, 39-49 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, 2-38 #969696,#2c2a3e, 39-49 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,