A detached session no frontend has sized is 160x50, not 80x24

At 80x24 a script's third or fourth pane/new was refused for want of
rows. `size` still sets any other size, and a frontend attaching its own.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/src/detached/server.zig b/src/detached/server.zig
index bb66b841..13cf4488 100644
--- a/src/detached/server.zig
+++ b/src/detached/server.zig
@@ -1201,11 +1201,20 @@ fn onQuitSignal(_: std.posix.SIG) callconv(.c) void {
     if (quit_wake >= 0) _ = libc.send(quit_wake, "q", 1, nosignal);
 }
 
+/// The screen of a detached session no frontend has sized.
+pub const detached_cols = 160;
+pub const detached_rows = 50;
+
 pub fn run(init: std.process.Init, opts: pardes.Options, name: []const u8) !void {
     const gpa = init.gpa;
     const allocs = pardes.memory.init(gpa);
     defer pardes.memory.deinit();
     var options = opts;
+    // No frontend yet, so no size to take: one roomy enough for a script's
+    // panes (80x24 left pane/new refused after a few); `size` sets another,
+    // and an attaching frontend its own.
+    options.cols = detached_cols;
+    options.rows = detached_rows;
     options.image_allocator = allocs.image;
     options.pdf_allocator = allocs.pdf;
     options.tree_sitter_allocator = allocs.tree_sitter;