`:N:H` looked at on a PDF pane turns to page N, as `book.pdf:N:H` does from anywhere, not a refusal that a PDF has no text

A PDF's own pane took only `:N`; `:5:3` was refused as no text to
address while `book.pdf:5:3` turned to page 5 (its search hit 3).
lookPdfPage now reads the page before a colon and the hit after it.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/test/pdf.zig b/test/pdf.zig
index 727a1515..a1be4075 100644
--- a/test/pdf.zig
+++ b/test/pdf.zig
@@ -492,6 +492,12 @@ test "`:N` on a PDF turns to page N, from the pane and from the root's look, and
     try std.testing.expect(std.mem.indexOf(u8, record, "\nerr ") == null);
     _ = p.serveFs(.{ .tag = 4, .op = .release, .node = log, .handle = h });
     while (p.nextEffect()) |_| {}
+    // `:N:H` on the pane is its page N, as `file.pdf:N:H` is.
+    p.look_missed = false;
+    pardes.look.lookAt(p, 0, ":1");
+    pardes.look.lookAt(p, 0, ":2:3");
+    try std.testing.expect(!p.look_missed);
+    try std.testing.expectEqual(@as(usize, 1), doc.pdf.?.page);
     // Page 0 is no page: the has-no-page miss.
     p.look_missed = false;
     pardes.look.lookAt(p, 0, ":0");