Merge upstream main 50f261d70 into next

ROADMAP.md, docs/roadmap.md: union of both sides' log lines and milestone rows, each line once.
parity/acrobat-features.toml, crates/xfdf/README.md: next's text, a superset of main's (#1917, #2686 plus #2688).
crates/edit/src/tests.rs: both sides' new tests (#2558 and #3084).
crates/ui-egui/src/editing.rs: the picked picture is cleared on every edit, and a new drawing commits its raster (#3149).

apps/pdfcraft/src/main.rs

@@ -231,7 +231,10 @@ fn main() -> eframe::Result {
     // running and exits (#282, #317, #1726). Any option means the caller wants this launch's own
     // window.
     let may_hand_off = !new_window && !files.is_empty() && options.is_empty() && control_file.is_none() && !create_images;
-    let instance = match single_instance::claim(&single_instance::absolute(&files), may_hand_off) {
+    // Absolute for this instance too: links relative to a document resolve against its folder,
+    // never the working directory.
+    let files = single_instance::absolute(&files);
+    let instance = match single_instance::claim(&files, may_hand_off) {
         single_instance::Claim::HandedOff => return Ok(()),
         single_instance::Claim::Primary(server) => Some(server),
         single_instance::Claim::Alone => None,