Resume interrupted editor co-op runs

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/menu.rs

@@ -280,6 +280,7 @@ enum Btn {
     MatchCoopCreate,
     MatchCoopSource, // switch between the built-in campaign and the editor campaign
     MatchCoopSolo,   // the selected co-op mission without the server, with an AI partner
+    MatchCoopResume, // go on with the interrupted co-op run of the selected campaign
     MatchTake(usize),
     MatchAi(usize),
     MatchTeam(usize), // next team for that seat
@@ -399,6 +400,7 @@ pub enum MenuAction {
     MatchCoopCreate(usize),
     MatchCoopEditorCreate(usize), // co-op match of a mission of `campaign_doc`
     MatchCoopSolo(Option<crate::campaign_doc::CampaignDoc>, usize), // offline with an AI partner: editor campaign or built-in, mission
+    MatchCoopResume(crate::campaign_doc::CampaignDoc), // an interrupted run of this campaign goes on
     MatchTakeSide(u8),
     MatchSetAi(u8, bool),
     MatchSetTeam(u8, u8, bool), // side, team, the own seat
@@ -800,6 +802,7 @@ impl Menu {
                 self.confirm = None;
                 MenuAction::Consumed
             }
+            Some(Btn::MatchCoopResume) => MenuAction::MatchCoopResume(self.coop_doc().clone()),
             Some(Btn::MatchCoopSolo) if self.coop_editor => MenuAction::MatchCoopSolo(Some(self.coop_doc().clone()), self.coop_editor_mission),
             Some(Btn::MatchCoopSolo) => MenuAction::MatchCoopSolo(None, self.coop_mission),
             Some(Btn::MatchCoopCreate) if self.coop_editor => MenuAction::MatchCoopEditorCreate(self.coop_editor_mission),
@@ -1998,6 +2001,12 @@ impl Menu {
                     items.push((Btn::MatchCoopNext, ">".to_string()));
                     items.push((Btn::MatchCoopSolo, tr("net.coop_solo")));
                 }
+                // an interrupted run of the shown campaign can go on (online, or offline with the AI)
+                if editor_coop {
+                    if let Some((m, _, _)) = crate::coop_resume_of(&doc) {
+                        items.push((Btn::MatchCoopResume, trf("net.coop_resume", &[(m + 1).to_string()])));
+                    }
+                }
                 // the button names what comes next
                 let next = match (editor_coop, self.coop_league) {
                     (false, _) => "net.coop_league",