Give the pipe its own fields in Pipe

Not a pure move: state moves. Pardes's `pipe_seq` and `pipe_wait` become
Pipe.zig's own fields `seq` and `wait`, and Pardes embeds one as
`pipe: Pipe = .{}`. pipeRequest reads only the request in flight, so it now
takes `pipe: *const Pipe` and the four shells call
`core.pipe.pipeRequest(id)` (their Pipe imports go away again); the other
pipe functions still need the panes and keep `p: *Pardes`, writing
`p.pipe.seq/wait`. Field reads in dump.zig, the shells' tests and two test
files follow (`core.pipe_wait` becomes `core.pipe.wait`). No behaviour
change.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/test/panes.zig b/test/panes.zig
index 1c861070..60dabb8a 100644
--- a/test/panes.zig
+++ b/test/panes.zig
@@ -1749,7 +1749,7 @@ test "tag prompt owns the pipe behavior through cancellation and submission" {
         try std.testing.expectEqual(how, pane.prompt.pipe.how);
         p.update(.{ .key = .{ .cp = 'c', .text = "cat" } });
         p.update(.{ .key = .{ .cp = Key.enter } });
-        const pending = p.pipe_wait orelse return error.MissingPipe;
+        const pending = p.pipe.wait orelse return error.MissingPipe;
         try std.testing.expectEqual(how, pending.how);
         try std.testing.expectEqualStrings("cat", pending.command);
         try std.testing.expectEqual(@as(usize, 1), pending.inputs.len);