feat(actions): add build queue view (#38585)

Adds a read-only Actions job queue: running jobs first, then waiting
jobs in the order a runner picks them up. It is shown instance-wide in
the admin Actions section with owner, repository and status filters, and
per repository in the Actions tab. Both lists refresh in place.

Pending work is currently only visible per repository and newest-first,
so nothing shows what is queued, in which order, or what occupies the
runners. Reordering the queue will be proposed separately.

A migration adds indexes for the runner pickup query and
repository-scoped status lookups.

* Fix #34198

<img width="1345" height="451" alt="image"
src="https://github.com/user-attachments/assets/7d52ff76-81b4-44e8-b583-d7d89c9dffcd"
/>
<img width="1809" height="1134" alt="image"
src="https://github.com/user-attachments/assets/4d56c0cb-bae7-4ce2-8f3c-75163b2bc7f4"
/>

---------

Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modelmigration/migrations.go

@@ -427,6 +427,7 @@ func prepareMigrationTasks() []*migration {
 		newMigration(351, "Track transfer recipient access grants", v28.AddRecipientAccessGrantedToRepoTransfer),
 		newMigration(352, "Add token columns to deploy_key", v28.AddTokenToDeployKey),
 		newMigration(353, "Add audit event table", v28.AddAuditEventTable),
+		newMigration(354, "Add Actions job queue indexes", v28.AddActionQueueIndexes),
 	}
 	return preparedMigrations
 }

modelmigration/v28/v354.go

@@ -0,0 +1,34 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v28
+
+import (
+	"context"
+
+	"gitea.dev/modelmigration/base"
+	"gitea.dev/modules/timeutil"
+
+	"xorm.io/xorm"
+)
+
+// AddActionQueueIndexes indexes the runner pickup query and repository-scoped status lookups.
+func AddActionQueueIndexes(_ context.Context, x base.EngineMigration) error {
+	type ActionRunJob struct {
+		RepoID  int64              `xorm:"index(repo_status)"`
+		TaskID  int64              `xorm:"index(pickup)"`
+		Status  int                `xorm:"index(pickup) index(repo_status)"`
+		Updated timeutil.TimeStamp `xorm:"index(pickup)"`
+	}
+
+	type ActionRun struct {
+		RepoID int64 `xorm:"index(repo_status)"`
+		Status int   `xorm:"index(repo_status)"`
+	}
+
+	_, err := x.SyncWithOptions(xorm.SyncOptions{
+		IgnoreDropIndices: true,
+		IgnoreConstrains:  true,
+	}, new(ActionRunJob), new(ActionRun))
+	return err
+}

modelmigration/v28/v354_test.go

@@ -0,0 +1,51 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v28
+
+import (
+	"testing"
+
+	"gitea.dev/modelmigration/migrationtest"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAddActionQueueIndexes(t *testing.T) {
+	type ActionRunJob struct {
+		ID      int64 `xorm:"pk autoincr"`
+		RepoID  int64
+		TaskID  int64
+		Status  int
+		Updated int64 `xorm:"updated"`
+	}
+	type ActionRun struct {
+		ID     int64 `xorm:"pk autoincr"`
+		RepoID int64
+		Status int
+	}
+
+	x, deferable := migrationtest.PrepareTestEnv(t, 0, new(ActionRunJob), new(ActionRun))
+	defer deferable()
+	if x == nil || t.Failed() {
+		return
+	}
+
+	require.NoError(t, AddActionQueueIndexes(t.Context(), x))
+
+	tables := migrationtest.LoadTableSchemasMap(t, x)
+	indexCols := func(table string) [][]string {
+		schema, ok := tables[table]
+		require.True(t, ok)
+		var cols [][]string
+		for _, idx := range schema.Indexes {
+			cols = append(cols, idx.Cols)
+		}
+		return cols
+	}
+
+	assert.Contains(t, indexCols("action_run_job"), []string{"task_id", "status", "updated"})
+	assert.Contains(t, indexCols("action_run_job"), []string{"repo_id", "status"})
+	assert.Contains(t, indexCols("action_run"), []string{"repo_id", "status"})
+}