File the tag code into tagline.zig and draw tags beside bodies

With tags reduced to Texts, what is left of them is the computed prefix, the
default and saved tails, entering and leaving a tag and the headers: that goes
to tagline.zig, as acme keeps the tag half of a window in wind.c. Tag and
header drawing moves next to body drawing in body_layer.zig, and the tag hit
helpers go to tag_layer.zig with the Hit they read, where sameCell now also
tells the lines of a taller tag apart. The docs describe the tag as a Text.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/src/dump.zig b/src/dump.zig
index aeb25a90..508e7300 100644
--- a/src/dump.zig
+++ b/src/dump.zig
@@ -7,6 +7,7 @@ const limits = @import("memory.zig").limits;
 // diagnostic is the only thing that says WHICH field went bad.
 const log = std.log.scoped(.dump);
 const pardes = @import("pardes.zig");
+const tagline = @import("tagline.zig");
 const layout = @import("layout.zig");
 const filesystem = @import("fs.zig");
 const ctlfs = @import("ninep/tree.zig");
@@ -603,7 +604,7 @@ pub fn dumpState(p: *Pardes) !void {
     for (p.panes, 0..) |slot, id| {
         const pane = slot orelse continue;
         slot_to_pane[id] = panes_len;
-        const tag = try p.tagText(arena, pane);
+        const tag = try tagline.tagText(p, arena, pane);
         const body = try body_layer.bodyText(p, arena, pane);
         const scroll: usize = @intCast(@max(0, pane.scroll()));
         var dp: Pane = if (pane.file) |*f| try pardes.panes.File.dumpPane(
@@ -784,7 +785,7 @@ fn initDump(gpa: std.mem.Allocator, opts: Options, zon_bytes: []const u8, previo
                 break :restore_image try pardes.panes.Image.restore(p, i, src);
             },
         };
-        p.restoreDumpTail(pane, src);
+        tagline.restoreDumpTail(p, pane, src);
         pane.vweight = src.vweight;
         pane.collapsed = src.collapsed;
     }