Save makes the directories its file goes in, always: for the pane's own name and Save path alike

Whether a Save made missing directories depended on how the name had
come about. Config's pane did, a name written into a missing directory did
(since kkrqxtsp), and `Save path` and every other name did not, failing
ENOENT instead. There is now one rule: a Save makes the parent
directories of the file it writes, a pane's own or a terminal's
scrollback included, and the make_dirs flag is gone. A directory it
cannot make still fails the write with why, as fs.py's
/nonexistent-pardes-dir case shows. fs.py now also saves into missing
directories by Save path and by a written name.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/builtins.zig b/src/builtins.zig
index 8fe49649..5a2037cf 100644
--- a/src/builtins.zig
+++ b/src/builtins.zig
@@ -1304,9 +1304,8 @@ pub const Config = struct {
         // Not there yet: a pane named for it, which Save makes.
         const free = c.p.freeSlot() orelse return c.p.reportError(c.id, "Config", error.NoPaneSlots);
         c.p.newScratchFor(c.id, .scratch);
-        const pane = c.p.panes[free] orelse return;
+        if (c.p.panes[free] == null) return;
         @import("ninep/pane.zig").nameBuffer(c.p, free, path, false) catch |err| return c.p.reportError(c.id, "Config", err);
-        pane.file.?.make_dirs = true;
         c.p.active = free;
     }
 };