Add YouTrack pull/push sync with project settings and time tracking.

Wire manual Y menu and CLI sync for issues and work items, persist
per-project credentials, and keep local edits until an explicit push.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/project/meta.go

@@ -0,0 +1,107 @@
+package project
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const metaFileName = "meta.json"
+
+// YouTrack holds remote sync settings for a project.
+type YouTrack struct {
+	BaseURL    string `json:"baseUrl"`
+	Token      string `json:"token"`
+	ProjectKey string `json:"projectKey"`
+	// Query overrides the default "project: <ProjectKey>" issue filter.
+	Query string `json:"query,omitempty"`
+}
+
+// Configured reports whether enough fields are set to sync.
+func (y YouTrack) Configured() bool {
+	return strings.TrimSpace(y.BaseURL) != "" &&
+		strings.TrimSpace(y.Token) != "" &&
+		strings.TrimSpace(y.ProjectKey) != ""
+}
+
+// IssueQuery returns the YouTrack search query used for sync.
+func (y YouTrack) IssueQuery() string {
+	if q := strings.TrimSpace(y.Query); q != "" {
+		return q
+	}
+	return "project: " + strings.TrimSpace(y.ProjectKey)
+}
+
+// Meta is per-project metadata stored beside tickets.json.
+type Meta struct {
+	YouTrack *YouTrack `json:"youtrack,omitempty"`
+}
+
+func (s *DirStore) metaPath(id string) string {
+	return filepath.Join(s.projectsRoot(), id, metaFileName)
+}
+
+// LoadMeta reads projects/<id>/meta.json. Missing file yields empty Meta.
+func (s *DirStore) LoadMeta(id string) (Meta, error) {
+	if id == "" {
+		return Meta{}, fmt.Errorf("project id is required")
+	}
+	path := s.metaPath(id)
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return Meta{}, nil
+		}
+		return Meta{}, fmt.Errorf("read meta %s: %w", id, err)
+	}
+	if len(data) == 0 {
+		return Meta{}, nil
+	}
+	var meta Meta
+	if err := json.Unmarshal(data, &meta); err != nil {
+		return Meta{}, fmt.Errorf("parse meta %s: %w", id, err)
+	}
+	return meta, nil
+}
+
+// SaveMeta writes projects/<id>/meta.json with mode 0600 (may contain tokens).
+func (s *DirStore) SaveMeta(id string, meta Meta) error {
+	if id == "" {
+		return fmt.Errorf("project id is required")
+	}
+	if err := s.Ensure(id); err != nil {
+		return err
+	}
+	path := s.metaPath(id)
+	data, err := json.MarshalIndent(meta, "", "  ")
+	if err != nil {
+		return fmt.Errorf("marshal meta: %w", err)
+	}
+	data = append(data, '\n')
+
+	tmp, err := os.CreateTemp(filepath.Dir(path), "meta-*.tmp")
+	if err != nil {
+		return fmt.Errorf("create temp meta: %w", err)
+	}
+	tmpName := tmp.Name()
+	defer func() { _ = os.Remove(tmpName) }()
+
+	if err := tmp.Chmod(0o600); err != nil {
+		_ = tmp.Close()
+		return fmt.Errorf("chmod temp meta: %w", err)
+	}
+	if _, err := tmp.Write(data); err != nil {
+		_ = tmp.Close()
+		return fmt.Errorf("write temp meta: %w", err)
+	}
+	if err := tmp.Close(); err != nil {
+		return fmt.Errorf("close temp meta: %w", err)
+	}
+	if err := os.Rename(tmpName, path); err != nil {
+		return fmt.Errorf("rename meta: %w", err)
+	}
+	_ = os.Chmod(path, 0o600)
+	return nil
+}