fix(project): push SSE update when an issue on a board is closed/reopened

Closing or reopening an issue did not notify project boards that carry
it as a card, so board tabs showed stale state until a manual reload.
CloseIssue/ReopenIssue only published milestone events and the issue
timeline notification — nothing project-scoped.

Add a CardStateChanged project event, published per linked project from
CloseIssue/ReopenIssue (best-effort; never fails the state change). The
board frontend flips the issue-state octicon in place and refetches the
affected column so state-filtered boards and counts stay correct. The
dispatch check precedes the CardUnlinked branch so a close/reopen is
not mistaken for a card removal.

Also switch a pre-existing String#match to RegExp#exec in the same file
to keep it lint-clean.

Closes #19

services/issue/status.go

@@ -12,8 +12,27 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	milestone_events "code.gitea.io/gitea/services/milestone_events"
 	notify_service "code.gitea.io/gitea/services/notify"
+	project_events "code.gitea.io/gitea/services/project_events"
 )
 
+// publishProjectCardStateChanged notifies every project board the issue is a
+// card on that its open/closed state changed, so subscribed board tabs can
+// re-render the card live instead of showing stale state until reload.
+// Best-effort: a failure here must not fail the close/reopen operation.
+func publishProjectCardStateChanged(ctx context.Context, issue *issues_model.Issue, isClosed bool) {
+	if err := issue.LoadProjects(ctx); err != nil {
+		log.Error("LoadProjects for issue[%d]: %v", issue.ID, err)
+		return
+	}
+	for _, p := range issue.Projects {
+		project_events.PublishCardStateChanged(ctx, project_events.CardStateChanged{
+			ProjectID: p.ID,
+			IssueID:   issue.ID,
+			IsClosed:  isClosed,
+		})
+	}
+}
+
 // CloseIssue close an issue.
 func CloseIssue(ctx context.Context, issue *issues_model.Issue, doer *user_model.User, commitID string) error {
 	var comment *issues_model.Comment
@@ -40,6 +59,7 @@ func CloseIssue(ctx context.Context, issue *issues_model.Issue, doer *user_model
 	}
 
 	notify_service.IssueChangeStatus(ctx, doer, commitID, issue, comment, true)
+	publishProjectCardStateChanged(ctx, issue, true)
 
 	return nil
 }
@@ -57,6 +77,7 @@ func ReopenIssue(ctx context.Context, issue *issues_model.Issue, doer *user_mode
 	}
 
 	notify_service.IssueChangeStatus(ctx, doer, commitID, issue, comment, false)
+	publishProjectCardStateChanged(ctx, issue, false)
 
 	return nil
 }

services/project_events/events.go

@@ -69,6 +69,17 @@ type CardUnlinked struct {
 	SessionTag string `json:"session_tag,omitempty"`
 }
 
+// CardStateChanged is emitted when an issue's open/closed state changes
+// while it is a card on the project. It lets boards re-render the card's
+// state live (and is the hook state-filtered boards use to correct their
+// column counts) without a full page reload.
+type CardStateChanged struct {
+	ProjectID  int64  `json:"project_id"`
+	IssueID    int64  `json:"issue_id"`
+	IsClosed   bool   `json:"is_closed"`
+	SessionTag string `json:"session_tag,omitempty"`
+}
+
 // ColumnCreated is emitted when a new column is added to a project.
 type ColumnCreated struct {
 	ProjectID int64  `json:"project_id"`
@@ -277,6 +288,14 @@ func PublishCardUnlinked(ctx context.Context, payload CardUnlinked) {
 	go publishEvent(detach(ctx), payload.ProjectID, payload)
 }
 
+// PublishCardStateChanged fans out a CardStateChanged event for the given payload.
+func PublishCardStateChanged(ctx context.Context, payload CardStateChanged) {
+	if payload.SessionTag == "" {
+		payload.SessionTag = SessionTagFromContext(ctx)
+	}
+	go publishEvent(detach(ctx), payload.ProjectID, payload)
+}
+
 // PublishColumnCreated fans out a ColumnCreated event for the given payload.
 func PublishColumnCreated(ctx context.Context, payload ColumnCreated) {
 	go publishEvent(detach(ctx), payload.ProjectID, payload)

services/project_events/events_test.go

@@ -112,6 +112,14 @@ func TestPublishHelpers_NameAndPayload(t *testing.T) {
 			},
 			wantData: CardUnlinked{ProjectID: 12, IssueID: 8},
 		},
+		{
+			name:     "card.state_changed",
+			wantName: "project-board.12",
+			invoke: func(ctx context.Context) {
+				PublishCardStateChanged(ctx, CardStateChanged{ProjectID: 12, IssueID: 8, IsClosed: true})
+			},
+			wantData: CardStateChanged{ProjectID: 12, IssueID: 8, IsClosed: true},
+		},
 		{
 			name:     "column.created",
 			wantName: "project-board.13",