Make birthdays calendar color configurable and expose it via CalDAV

- Add a per-user birthday_calendars table (color, cascade-deletes with
  the user) and GetBirthdayCalendarColor/SetBirthdayCalendarColor in
  internal/db, plus a reservedCalendarNames guard ("birthdays") in
  CreateCalendarWithColor so no real calendar can collide with the
  synthetic one, whether created via the web UI, nidusctl, or CalDAV
  MKCALENDAR.
- Add a "Birthdays" virtual resource card to the dashboard (color
  picker only, no delete/share controls) backed by a new
  ResourceCard.Virtual flag and POST /web/resources/birthdays/color
  handler.
- Extract the birthday-parsing/generation logic shared by the web
  calendar view and CalDAV into internal/birthdays (ParseBirthday,
  Collect, OccurrenceDate, Summary) instead of duplicating it.
- Expose the Birthdays calendar over real CalDAV in
  internal/caldav/backend.go + birthdays.go: it's always listed for
  every user, generates one VEVENT per (contact, year) for a rolling
  window (current year -2..+8) with "🎂 Name (Age)" titles, is
  read-only (Put/Delete/DeleteCalendar all return 403), and its
  Apple/DAVx5 calendar-color is injected from the same per-user
  setting used by the dashboard/web view.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

internal/birthdays/birthdays.go

@@ -0,0 +1,126 @@
+// Package birthdays computes virtual "birthday events" from a user's own
+// contacts, shared by the web calendar UI (internal/web) and the CalDAV
+// backend (internal/caldav) so both present identical titles/dates for the
+// synthetic Birthdays calendar without duplicating the parsing logic.
+package birthdays
+
+import (
+	"bytes"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/emersion/go-vcard"
+
+	"github.com/yourusername/caldav-server/internal/db"
+	"github.com/yourusername/caldav-server/internal/store"
+)
+
+// Contact holds one contact's parsed birthday.
+type Contact struct {
+	Name  string
+	Book  string
+	ID    string
+	Month time.Month
+	Day   int
+	Year  int // 0 if the vCard's BDAY has no year (e.g. "--08-20")
+}
+
+// fullRe matches a BDAY value that includes a year, in either
+// "YYYY-MM-DD" or the older vCard 3.0 "YYYYMMDD" form.
+var fullRe = regexp.MustCompile(`^(\d{4})-?(\d{2})-?(\d{2})`)
+
+// noYearRe matches a year-less BDAY value per RFC 6350 §4.3.1,
+// "--MM-DD" or "--MMDD".
+var noYearRe = regexp.MustCompile(`^--(\d{2})-?(\d{2})`)
+
+// ParseBirthday extracts month/day (and year, if present) from a vCard
+// BDAY field value. Returns ok=false if v isn't a recognized date format
+// or names an impossible month/day.
+func ParseBirthday(v string) (month time.Month, day int, year int, ok bool) {
+	v = strings.TrimSpace(v)
+	if m := noYearRe.FindStringSubmatch(v); m != nil {
+		mo, _ := strconv.Atoi(m[1])
+		d, _ := strconv.Atoi(m[2])
+		if mo < 1 || mo > 12 || d < 1 || d > 31 {
+			return 0, 0, 0, false
+		}
+		return time.Month(mo), d, 0, true
+	}
+	if m := fullRe.FindStringSubmatch(v); m != nil {
+		y, _ := strconv.Atoi(m[1])
+		mo, _ := strconv.Atoi(m[2])
+		d, _ := strconv.Atoi(m[3])
+		if mo < 1 || mo > 12 || d < 1 || d > 31 {
+			return 0, 0, 0, false
+		}
+		return time.Month(mo), d, y, true
+	}
+	return 0, 0, 0, false
+}
+
+// Collect scans every one of username's own address books for contacts
+// with a parseable BDAY field.
+func Collect(st *store.Store, dbase *db.DB, username string) ([]Contact, error) {
+	books, err := dbase.ListAddressBooks(username)
+	if err != nil {
+		return nil, err
+	}
+
+	var contacts []Contact
+	for _, book := range books {
+		ids, err := st.ListObjects(username, "card-"+book)
+		if err != nil {
+			continue
+		}
+		for _, id := range ids {
+			data, err := st.GetObject(username, "card-"+book, id)
+			if err != nil {
+				continue
+			}
+			card, err := vcard.NewDecoder(bytes.NewReader(data)).Decode()
+			if err != nil {
+				continue
+			}
+			bday := card.PreferredValue(vcard.FieldBirthday)
+			if bday == "" {
+				continue
+			}
+			month, day, year, ok := ParseBirthday(bday)
+			if !ok {
+				continue
+			}
+			name := card.PreferredValue(vcard.FieldFormattedName)
+			if name == "" {
+				name = id
+			}
+			contacts = append(contacts, Contact{
+				Name: name, Book: book, ID: id, Month: month, Day: day, Year: year,
+			})
+		}
+	}
+	return contacts, nil
+}
+
+// OccurrenceDate returns the date c's birthday falls on in year, and false
+// if that combination doesn't exist (e.g. Feb 29 in a non-leap year,
+// where Go's time.Date would otherwise silently normalize to March 1/2).
+func OccurrenceDate(c Contact, year int, loc *time.Location) (time.Time, bool) {
+	occ := time.Date(year, c.Month, c.Day, 0, 0, 0, 0, loc)
+	if occ.Month() != c.Month || occ.Day() != c.Day {
+		return time.Time{}, false
+	}
+	return occ, true
+}
+
+// Summary formats c's virtual event title for the given year:
+// "🎂 Name", or "🎂 Name (Age)" if c's birth year is known.
+func Summary(c Contact, year int) string {
+	s := "🎂 " + c.Name
+	if c.Year > 0 {
+		s += fmt.Sprintf(" (%d)", year-c.Year)
+	}
+	return s
+}

internal/caldav/backend.go

@@ -84,12 +84,14 @@ func (b *Backend) ListCalendars(ctx context.Context) ([]caldav.Calendar, error)
 		return nil, webdav.NewHTTPError(http.StatusUnauthorized, fmt.Errorf("not authenticated"))
 	}
 
+	// The synthetic Birthdays calendar is always present, computed from
+	// the requester's own contacts.
 	names, err := b.dbase.ListCalendars(p.Username)
 	if err != nil {
 		return nil, fmt.Errorf("listing calendars: %w", err)
 	}
 
-	var cals []caldav.Calendar
+	cals := []caldav.Calendar{b.birthdaysCalendarMeta(p.Username)}
 	for _, cal := range names {
 		if err := b.store.EnsureCollection(p.Username, "cal-"+cal.Name); err != nil {
 			b.logger.Warn("ensuring calendar directory", "calendar", cal.Name, "error", err)
@@ -134,6 +136,10 @@ func (b *Backend) GetCalendar(ctx context.Context, calPath string) (*caldav.Cale
 	if err != nil {
 		return nil, err
 	}
+	if localName == birthdaysCalendarName {
+		cal := b.birthdaysCalendarMeta(requester)
+		return &cal, nil
+	}
 	owner, realName, _, err := b.resolveCalendar(requester, localName, false)
 	if err != nil {
 		return nil, err
@@ -150,6 +156,9 @@ func (b *Backend) GetCalendarObject(ctx context.Context, objPath string, req *ca
 	if err != nil {
 		return nil, err
 	}
+	if localName == birthdaysCalendarName {
+		return b.birthdayCalendarObject(requester, objPath, objID)
+	}
 	owner, realName, _, err := b.resolveCalendar(requester, localName, false)
 	if err != nil {
 		return nil, err
@@ -168,6 +177,9 @@ func (b *Backend) ListCalendarObjects(ctx context.Context, calPath string, req *
 	if err != nil {
 		return nil, err
 	}
+	if localName == birthdaysCalendarName {
+		return b.listBirthdayCalendarObjects(requester)
+	}
 	owner, realName, _, err := b.resolveCalendar(requester, localName, false)
 	if err != nil {
 		return nil, err
@@ -213,9 +225,14 @@ func (b *Backend) CreateCalendar(ctx context.Context, calendar *caldav.Calendar)
 	// existing calendar is done via ShareCalendar, not by creating one
 	// directly in someone else's name.
 	name := path.Base(strings.TrimSuffix(calendar.Path, "/"))
-	if err := b.dbase.CreateCalendar(p.Username, name); err != nil && err != db.ErrResourceExists {
+	if err := b.dbase.CreateCalendar(p.Username, name); err != nil {
+		if err == db.ErrReservedName {
+			return webdav.NewHTTPError(http.StatusForbidden, err)
+		}
+		if err != db.ErrResourceExists {
 			return fmt.Errorf("registering calendar: %w", err)
 		}
+	}
 	return b.store.EnsureCollection(p.Username, "cal-"+name)
 }
 
@@ -224,6 +241,9 @@ func (b *Backend) DeleteCalendar(ctx context.Context, calPath string) error {
 	if err != nil {
 		return err
 	}
+	if localName == birthdaysCalendarName {
+		return webdav.NewHTTPError(http.StatusForbidden, fmt.Errorf("the birthdays calendar is read-only and computed automatically"))
+	}
 	owner, realName, _, err := b.resolveCalendar(requester, localName, true)
 	if err != nil {
 		return err
@@ -239,6 +259,9 @@ func (b *Backend) PutCalendarObject(ctx context.Context, objPath string, calenda
 	if err != nil {
 		return nil, err
 	}
+	if localName == birthdaysCalendarName {
+		return nil, webdav.NewHTTPError(http.StatusForbidden, fmt.Errorf("the birthdays calendar is read-only and computed automatically"))
+	}
 	owner, realName, _, err := b.resolveCalendar(requester, localName, true)
 	if err != nil {
 		return nil, err
@@ -263,6 +286,9 @@ func (b *Backend) DeleteCalendarObject(ctx context.Context, objPath string) erro
 	if err != nil {
 		return err
 	}
+	if localName == birthdaysCalendarName {
+		return webdav.NewHTTPError(http.StatusForbidden, fmt.Errorf("the birthdays calendar is read-only and computed automatically"))
+	}
 	owner, realName, _, err := b.resolveCalendar(requester, localName, true)
 	if err != nil {
 		return err
@@ -495,14 +521,26 @@ func (h *colorInjectingHandler) injectCalendarColors(ctx context.Context, body [
 			return block
 		}
 		localName := strings.TrimSuffix(strings.TrimPrefix(href, calHomePath()), "/")
-		owner, realName, _, err := h.backend.resolveCalendar(p.Username, localName, false)
+		var color string
+		var err error
+		if localName == birthdaysCalendarName {
+			color, err = h.backend.dbase.GetBirthdayCalendarColor(p.Username)
 			if err != nil {
+				color = ""
+			}
+			if color == "" {
+				color = defaultBirthdayColor
+			}
+		} else {
+			owner, realName, _, rerr := h.backend.resolveCalendar(p.Username, localName, false)
+			if rerr != nil {
 				return block
 			}
-		color, err := h.backend.dbase.GetCalendarColor(owner, realName)
+			color, err = h.backend.dbase.GetCalendarColor(owner, realName)
 			if err != nil || color == "" {
 				return block
 			}
+		}
 
 		// Drop any propstat block that only complains calendar-color is
 		// unknown (a 404/not-found propstat containing a bare, empty

internal/caldav/backend_test.go

@@ -209,8 +209,14 @@ func TestPropFindEmitsCalendarColor(t *testing.T) {
 	// Find personal's response block boundaries loosely by looking for the
 	// nearest calendar-color occurrence and ensuring it isn't right next to
 	// the personal href (colors are per-block, checked via count instead).
-	if strings.Count(body, "<calendar-color ") != 1 {
-		t.Fatalf("expected exactly one calendar-color element (only for work), got: %s", body)
+	// Two calendar-color elements are expected: one for "work" (explicit
+	// color) and one for the always-present synthetic "birthdays" calendar
+	// (default color, since it wasn't explicitly set here).
+	if strings.Count(body, "<calendar-color ") != 2 {
+		t.Fatalf("expected exactly two calendar-color elements (work + birthdays default), got: %s", body)
+	}
+	if !strings.Contains(body, `<calendar-color xmlns="http://apple.com/ns/ical/">`+defaultBirthdayColor+`FF</calendar-color>`) {
+		t.Fatalf("expected default birthdays calendar-color, got: %s", body)
 	}
 }
 

internal/caldav/birthdays.go

@@ -0,0 +1,156 @@
+package caldav
+
+import (
+	"fmt"
+	"net/http"
+	"path"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	ical "github.com/emersion/go-ical"
+	"github.com/emersion/go-webdav"
+	"github.com/emersion/go-webdav/caldav"
+
+	"github.com/yourusername/caldav-server/internal/birthdays"
+)
+
+// birthdaysCalendarName is the fixed, reserved local calendar name the
+// synthetic Birthdays calendar is exposed under (see
+// db.reservedCalendarNames, which prevents a real calendar from ever
+// colliding with it). It has no owner/shared-name segment: it's always
+// computed from the requester's own contacts.
+const birthdaysCalendarName = "birthdays"
+
+// defaultBirthdayColor is the display color for the virtual birthdays
+// calendar when the user hasn't chosen one, matching internal/web's.
+const defaultBirthdayColor = "#ec4899"
+
+// birthdayWindowPast/birthdayWindowFuture bound how many years around the
+// current one the synthetic Birthdays calendar generates events for.
+// CalDAV clients sync ahead of time (unlike the web view, which only
+// computes the month currently being browsed), so a fixed window is
+// generated upfront instead.
+const birthdayWindowPast = 2
+const birthdayWindowFuture = 8
+
+// birthdayObjIDRe parses an object ID of the form
+// "<book>~<contact-id-without-ext>~<year>.ics" back into its parts.
+var birthdayObjIDRe = regexp.MustCompile(`^([^~]+)~([^~]+)~(\d{4})\.ics$`)
+
+// birthdayObjID builds the stable object ID for contact c's birthday
+// occurrence in year, encoding enough information to regenerate that
+// exact VEVENT on demand in GetCalendarObject.
+func birthdayObjID(c birthdays.Contact, year int) string {
+	base := strings.TrimSuffix(c.ID, path.Ext(c.ID))
+	return fmt.Sprintf("%s~%s~%d.ics", c.Book, base, year)
+}
+
+// birthdaysCalendarMeta returns the caldav.Calendar metadata for
+// username's synthetic Birthdays calendar.
+func (b *Backend) birthdaysCalendarMeta(username string) caldav.Calendar {
+	return caldav.Calendar{
+		Path:                  calHomePath() + birthdaysCalendarName + "/",
+		Name:                  "Birthdays",
+		Description:           "Birthdays computed from your contacts",
+		SupportedComponentSet: []string{"VEVENT"},
+		MaxResourceSize:       64 * 1024,
+	}
+}
+
+// listBirthdayCalendarObjects generates one VEVENT per (contact, year)
+// pair within the fixed rolling window for every contact of username's
+// that has a parseable birthday.
+func (b *Backend) listBirthdayCalendarObjects(username string) ([]caldav.CalendarObject, error) {
+	contacts, err := birthdays.Collect(b.store, b.dbase, username)
+	if err != nil {
+		return nil, fmt.Errorf("collecting birthdays: %w", err)
+	}
+
+	now := time.Now()
+	var objs []caldav.CalendarObject
+	for _, c := range contacts {
+		for year := now.Year() - birthdayWindowPast; year <= now.Year()+birthdayWindowFuture; year++ {
+			obj, ok := b.encodeBirthdayObject(c, year)
+			if !ok {
+				continue
+			}
+			objs = append(objs, *obj)
+		}
+	}
+	return objs, nil
+}
+
+// birthdayCalendarObject regenerates a single VEVENT for the (contact,
+// year) pair encoded in objID.
+func (b *Backend) birthdayCalendarObject(username, objPath, objID string) (*caldav.CalendarObject, error) {
+	m := birthdayObjIDRe.FindStringSubmatch(objID)
+	if m == nil {
+		return nil, webdav.NewHTTPError(http.StatusNotFound, fmt.Errorf("unrecognized birthday object id"))
+	}
+	book, idBase, year := m[1], m[2], m[3]
+	yearNum, err := strconv.Atoi(year)
+	if err != nil {
+		return nil, webdav.NewHTTPError(http.StatusNotFound, fmt.Errorf("invalid year"))
+	}
+
+	contacts, err := birthdays.Collect(b.store, b.dbase, username)
+	if err != nil {
+		return nil, fmt.Errorf("collecting birthdays: %w", err)
+	}
+	for _, c := range contacts {
+		if c.Book != book {
+			continue
+		}
+		if strings.TrimSuffix(c.ID, path.Ext(c.ID)) != idBase {
+			continue
+		}
+		obj, ok := b.encodeBirthdayObject(c, yearNum)
+		if !ok {
+			break
+		}
+		obj.Path = objPath
+		return obj, nil
+	}
+	return nil, webdav.NewHTTPError(http.StatusNotFound, fmt.Errorf("birthday event not found"))
+}
+
+// encodeBirthdayObject builds the all-day VEVENT for contact c's birthday
+// occurrence in year, returning ok=false if that (month, day) combination
+// doesn't exist in year (e.g. Feb 29 in a non-leap year).
+func (b *Backend) encodeBirthdayObject(c birthdays.Contact, year int) (*caldav.CalendarObject, bool) {
+	start, ok := birthdays.OccurrenceDate(c, year, time.UTC)
+	if !ok {
+		return nil, false
+	}
+	end := start.AddDate(0, 0, 1)
+
+	event := ical.NewEvent()
+	uid := birthdayObjID(c, year)
+	event.Props.SetText(ical.PropUID, uid)
+	event.Props.SetText(ical.PropSummary, birthdays.Summary(c, year))
+	event.Props.SetDate(ical.PropDateTimeStart, start)
+	event.Props.SetDate(ical.PropDateTimeEnd, end)
+	event.Props.SetDateTime(ical.PropDateTimeStamp, time.Now().UTC())
+	event.Props.SetText(ical.PropTransparency, "TRANSPARENT")
+
+	cal := ical.NewCalendar()
+	cal.Props.SetText(ical.PropVersion, "2.0")
+	cal.Props.SetText(ical.PropProductID, "-//nidus//birthdays//EN")
+	cal.Children = append(cal.Children, event.Component)
+
+	var buf strings.Builder
+	if err := ical.NewEncoder(&buf).Encode(cal); err != nil {
+		return nil, false
+	}
+
+	objID := birthdayObjID(c, year)
+	return &caldav.CalendarObject{
+		Path:          calObjectPath(birthdaysCalendarName, objID),
+		ModTime:       time.Now(),
+		ContentLength: int64(buf.Len()),
+		ETag:          fmt.Sprintf(`"bday-%s-%d"`, strings.TrimSuffix(c.ID, path.Ext(c.ID)), year),
+		Data:          cal,
+	}, true
+}

internal/db/db.go

@@ -96,6 +96,15 @@ CREATE TABLE IF NOT EXISTS addressbook_shares (
 	UNIQUE (owner, addressbook_name, shared_with)
 );
 
+-- Per-user display color for the synthetic "Birthdays" calendar (computed
+-- from contacts' BDAY fields, not a real user-created calendar — see
+-- internal/web/calendar.go and internal/caldav/backend.go). One row per
+-- user; absent means "use the built-in default color".
+CREATE TABLE IF NOT EXISTS birthday_calendars (
+	owner TEXT PRIMARY KEY REFERENCES users (username) ON DELETE CASCADE,
+	color TEXT NOT NULL DEFAULT ''
+);
+
 -- Web UI login sessions. Sessions are opaque random tokens stored server
 -- side (not JWTs) so they can be revoked instantly by deleting the row.
 CREATE TABLE IF NOT EXISTS web_sessions (

internal/db/users.go

@@ -24,6 +24,19 @@ var ErrResourceExists = errors.New("resource already exists")
 // that doesn't exist.
 var ErrResourceNotFound = errors.New("resource not found")
 
+// ErrReservedName is returned when trying to create a calendar whose name
+// is reserved for a computed/virtual calendar (see reservedCalendarNames).
+var ErrReservedName = errors.New("calendar name is reserved")
+
+// reservedCalendarNames are calendar names that can't be used for a real,
+// user-created calendar because they're reserved for a synthetic,
+// computed calendar shown alongside real ones (e.g. "birthdays", see
+// internal/web/calendar.go and internal/caldav/backend.go). Matched
+// case-insensitively.
+var reservedCalendarNames = map[string]bool{
+	"birthdays": true,
+}
+
 // User is an account stored in the database.
 type User struct {
 	Username     string
@@ -175,8 +188,11 @@ func (d *DB) CreateCalendar(owner, name string) error {
 // CreateCalendarWithColor registers a new calendar owned by owner with the
 // given color (an empty string means no color is set, in which case the
 // client picks its own default). Returns ErrResourceExists if it already
-// exists.
+// exists, or ErrReservedName if name is reserved for a computed calendar.
 func (d *DB) CreateCalendarWithColor(owner, name, color string) error {
+	if reservedCalendarNames[strings.ToLower(name)] {
+		return ErrReservedName
+	}
 	_, err := d.conn.Exec(`INSERT INTO calendars (owner, name, color) VALUES (?, ?, ?)`, owner, name, color)
 	if err != nil {
 		if isUniqueConstraintErr(err) {
@@ -254,6 +270,34 @@ func (d *DB) ListCalendars(owner string) ([]Calendar, error) {
 	return cals, rows.Err()
 }
 
+// GetBirthdayCalendarColor returns owner's display color for the
+// synthetic "Birthdays" calendar, or "" if they haven't set one (callers
+// should fall back to a built-in default in that case).
+func (d *DB) GetBirthdayCalendarColor(owner string) (string, error) {
+	var color string
+	err := d.conn.QueryRow(`SELECT color FROM birthday_calendars WHERE owner = ?`, owner).Scan(&color)
+	if errors.Is(err, sql.ErrNoRows) {
+		return "", nil
+	}
+	if err != nil {
+		return "", fmt.Errorf("getting birthday calendar color: %w", err)
+	}
+	return color, nil
+}
+
+// SetBirthdayCalendarColor sets (or updates) owner's display color for
+// the synthetic "Birthdays" calendar.
+func (d *DB) SetBirthdayCalendarColor(owner, color string) error {
+	_, err := d.conn.Exec(`
+		INSERT INTO birthday_calendars (owner, color) VALUES (?, ?)
+		ON CONFLICT (owner) DO UPDATE SET color = excluded.color`,
+		owner, color)
+	if err != nil {
+		return fmt.Errorf("setting birthday calendar color: %w", err)
+	}
+	return nil
+}
+
 // -------- address books --------
 
 // CreateAddressBook registers a new address book owned by owner. Returns

internal/web/calendar.go

@@ -16,7 +16,7 @@ import (
 	"time"
 
 	ical "github.com/emersion/go-ical"
-	vcard "github.com/emersion/go-vcard"
+	"github.com/yourusername/caldav-server/internal/birthdays"
 	"github.com/yourusername/caldav-server/internal/db"
 	"github.com/yourusername/caldav-server/internal/web/templates"
 )
@@ -133,9 +133,20 @@ type calendarEntry struct {
 // mistaken for an "owner~name" shared-calendar ref either).
 const birthdaysCalRef = "@birthdays"
 
-// birthdayColor is the fixed display color for the virtual birthdays
-// calendar (a pink, distinct from typical user-picked calendar colors).
-const birthdayColor = "#ec4899"
+// defaultBirthdayColor is the display color for the virtual birthdays
+// calendar used until the user picks their own from the dashboard (a
+// pink, distinct from typical user-picked calendar colors).
+const defaultBirthdayColor = "#ec4899"
+
+// birthdayCalendarColor returns username's chosen color for the virtual
+// birthdays calendar, falling back to defaultBirthdayColor if unset.
+func (s *Server) birthdayCalendarColor(username string) string {
+	color, err := s.dbase.GetBirthdayCalendarColor(username)
+	if err != nil || color == "" {
+		return defaultBirthdayColor
+	}
+	return color
+}
 
 // listCalendarEntries returns every calendar visible to username: the
 // synthetic birthdays calendar, their own calendars (always writable),
@@ -143,7 +154,7 @@ const birthdayColor = "#ec4899"
 // write permission).
 func (s *Server) listCalendarEntries(username string) ([]calendarEntry, error) {
 	entries := []calendarEntry{
-		{Ref: birthdaysCalRef, Owner: username, Name: "Birthdays", Color: birthdayColor, Writable: false, Virtual: true},
+		{Ref: birthdaysCalRef, Owner: username, Name: "Birthdays", Color: s.birthdayCalendarColor(username), Writable: false, Virtual: true},
 	}
 
 	own, err := s.dbase.ListCalendars(username)
@@ -973,100 +984,13 @@ func (s *Server) handleCalendarImport(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, "/web/calendar?imported="+strconv.Itoa(imported), http.StatusSeeOther)
 }
 
-// birthdayContact holds one contact's parsed birthday, ready to be placed
-// on the month grid.
-type birthdayContact struct {
-	Name  string
-	Book  string
-	ID    string
-	Month time.Month
-	Day   int
-	Year  int // 0 if the vCard's BDAY has no year (e.g. "--08-20")
-}
-
-// birthdayFullRe matches a BDAY value that includes a year, in either
-// "YYYY-MM-DD" or the older vCard 3.0 "YYYYMMDD" form.
-var birthdayFullRe = regexp.MustCompile(`^(\d{4})-?(\d{2})-?(\d{2})`)
-
-// birthdayNoYearRe matches a year-less BDAY value per RFC 6350 §4.3.1,
-// "--MM-DD" or "--MMDD".
-var birthdayNoYearRe = regexp.MustCompile(`^--(\d{2})-?(\d{2})`)
-
-// parseBirthday extracts month/day (and year, if present) from a vCard
-// BDAY field value. Returns ok=false if v isn't a recognized date format
-// or names an impossible month/day.
-func parseBirthday(v string) (month time.Month, day int, year int, ok bool) {
-	v = strings.TrimSpace(v)
-	if m := birthdayNoYearRe.FindStringSubmatch(v); m != nil {
-		mo, _ := strconv.Atoi(m[1])
-		d, _ := strconv.Atoi(m[2])
-		if mo < 1 || mo > 12 || d < 1 || d > 31 {
-			return 0, 0, 0, false
-		}
-		return time.Month(mo), d, 0, true
-	}
-	if m := birthdayFullRe.FindStringSubmatch(v); m != nil {
-		y, _ := strconv.Atoi(m[1])
-		mo, _ := strconv.Atoi(m[2])
-		d, _ := strconv.Atoi(m[3])
-		if mo < 1 || mo > 12 || d < 1 || d > 31 {
-			return 0, 0, 0, false
-		}
-		return time.Month(mo), d, y, true
-	}
-	return 0, 0, 0, false
-}
-
-// collectBirthdays scans every one of username's own address books for
-// contacts with a parseable BDAY field.
-func (s *Server) collectBirthdays(username string) ([]birthdayContact, error) {
-	books, err := s.dbase.ListAddressBooks(username)
-	if err != nil {
-		return nil, err
-	}
-
-	var contacts []birthdayContact
-	for _, book := range books {
-		ids, err := s.store.ListObjects(username, "card-"+book)
-		if err != nil {
-			continue
-		}
-		for _, id := range ids {
-			data, err := s.store.GetObject(username, "card-"+book, id)
-			if err != nil {
-				continue
-			}
-			card, err := vcard.NewDecoder(bytes.NewReader(data)).Decode()
-			if err != nil {
-				continue
-			}
-			bday := card.PreferredValue(vcard.FieldBirthday)
-			if bday == "" {
-				continue
-			}
-			month, day, year, ok := parseBirthday(bday)
-			if !ok {
-				continue
-			}
-			name := card.PreferredValue(vcard.FieldFormattedName)
-			if name == "" {
-				name = id
-			}
-			contacts = append(contacts, birthdayContact{
-				Name: name, Book: book, ID: id, Month: month, Day: day, Year: year,
-			})
-		}
-	}
-	return contacts, nil
-}
-
 // addBirthdayEvents places one virtual all-day event per contact
 // birthday falling within [gridStart, gridEnd] into days, titled
 // "🎂 Name" (or "🎂 Name (Age)" when the birth year is known). Each event
 // links to the contact's edit page instead of an event edit page, since
 // there is no underlying calendar object to edit.
 func (s *Server) addBirthdayEvents(username string, entry calendarEntry, gridStart, gridEnd time.Time, dayIndex map[string]int, days []templates.MonthDay) error {
-	contacts, err := s.collectBirthdays(username)
+	contacts, err := birthdays.Collect(s.store, s.dbase, username)
 	if err != nil {
 		return err
 	}
@@ -1084,11 +1008,8 @@ func (s *Server) addBirthdayEvents(username string, entry calendarEntry, gridSta
 
 	for _, c := range contacts {
 		for _, year := range years {
-			occurrence := time.Date(year, c.Month, c.Day, 0, 0, 0, 0, gridStart.Location())
-			// Guard against date normalization (e.g. Feb 29 in a
-			// non-leap year rolling over into March) placing the event
-			// on the wrong day.
-			if occurrence.Month() != c.Month || occurrence.Day() != c.Day {
+			occurrence, ok := birthdays.OccurrenceDate(c, year, gridStart.Location())
+			if !ok {
 				continue
 			}
 			if occurrence.Before(gridStart) || occurrence.After(gridEnd) {
@@ -1098,15 +1019,11 @@ func (s *Server) addBirthdayEvents(username string, entry calendarEntry, gridSta
 			if !ok {
 				continue
 			}
-			summary := "🎂 " + c.Name
-			if c.Year > 0 {
-				summary += fmt.Sprintf(" (%d)", year-c.Year)
-			}
 			days[idx].Events = append(days[idx].Events, templates.EventSummary{
 				ID:      c.Book + "/" + c.ID,
 				CalRef:  entry.Ref,
 				Color:   entry.Color,
-				Summary: summary,
+				Summary: birthdays.Summary(c, year),
 				AllDay:  true,
 				LinkURL: "/web/contacts/" + c.Book + "/" + c.ID + "/edit",
 			})

internal/web/dashboard.go

@@ -49,7 +49,9 @@ func (s *Server) handleDashboard(w http.ResponseWriter, r *http.Request) {
 // #resources list after a create/delete (since the set of cards changes,
 // unlike a share update which only changes one card's contents).
 func (s *Server) resourceCards(username string) ([]templates.ResourceCard, error) {
-	var resources []templates.ResourceCard
+	resources := []templates.ResourceCard{
+		{Kind: "calendar", Name: "Birthdays", Color: s.birthdayCalendarColor(username), Virtual: true},
+	}
 
 	calNames, err := s.dbase.ListCalendars(username)
 	if err != nil {

internal/web/resources.go

@@ -69,6 +69,37 @@ func (s *Server) handleCalendarColor(w http.ResponseWriter, r *http.Request) {
 	_ = templates.ResourceCardView(card).Render(r.Context(), w)
 }
 
+// handleBirthdayColor updates the current user's display color for the
+// synthetic "Birthdays" calendar, mounted at /resources/birthdays/color.
+// It re-renders just that card (not the whole list), since the set of
+// cards doesn't change.
+func (s *Server) handleBirthdayColor(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		w.Header().Set("Allow", "POST")
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	username := userFromContext(r.Context())
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, "invalid form", http.StatusBadRequest)
+		return
+	}
+	color := strings.TrimSpace(r.PostForm.Get("color"))
+	if color != "" && !hexColorRe.MatchString(color) {
+		http.Error(w, "color must be a hex value like #3b82f6", http.StatusBadRequest)
+		return
+	}
+	if err := s.dbase.SetBirthdayCalendarColor(username, color); err != nil {
+		s.logger.Error("setting birthday calendar color", "error", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+
+	card := templates.ResourceCard{Kind: "calendar", Name: "Birthdays", Color: s.birthdayCalendarColor(username), Virtual: true}
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	_ = templates.ResourceCardView(card).Render(r.Context(), w)
+}
+
 func (s *Server) handleResource(w http.ResponseWriter, r *http.Request, kind string) {
 	username := userFromContext(r.Context())
 
@@ -109,6 +140,10 @@ func (s *Server) handleResource(w http.ResponseWriter, r *http.Request, kind str
 				http.Error(w, "already exists", http.StatusConflict)
 				return
 			}
+			if err == db.ErrReservedName {
+				http.Error(w, "this name is reserved for a computed calendar", http.StatusConflict)
+				return
+			}
 			s.logger.Error("creating resource", "kind", kind, "error", err)
 			http.Error(w, "internal error", http.StatusInternalServerError)
 			return

internal/web/server.go

@@ -44,6 +44,7 @@ func (s *Server) Handler(staticFS http.FileSystem) http.Handler {
 	mux.HandleFunc("/shares/addressbook", s.requireLogin(s.handleAddressBookShare))
 	mux.HandleFunc("/resources/calendar", s.requireLogin(s.handleCalendarResource))
 	mux.HandleFunc("/resources/calendar/color", s.requireLogin(s.handleCalendarColor))
+	mux.HandleFunc("/resources/birthdays/color", s.requireLogin(s.handleBirthdayColor))
 	mux.HandleFunc("/resources/addressbook", s.requireLogin(s.handleAddressBookResource))
 	mux.HandleFunc("/files/{path...}", s.requireLogin(s.handleFiles))
 	mux.HandleFunc("/contacts", s.requireLogin(s.handleContactsHome))

internal/web/templates/dashboard.templ

@@ -15,6 +15,7 @@ type ResourceCard struct {
 	Name    string
 	Color   string // hex color like "#3b82f6"; only used for calendars
 	Shares  []ShareRow
+	Virtual bool // true for computed calendars (e.g. birthdays): no delete/sharing, just a color picker
 }
 
 // SharedWithMeItem describes a resource another user has shared with the
@@ -115,7 +116,7 @@ templ ResourceCardView(r ResourceCard) {
 			<h2 class="font-medium flex items-center gap-2">
 				if r.Kind == "calendar" {
 					<form
-						hx-post="/web/resources/calendar/color"
+						hx-post={ colorEndpoint(r) }
 						hx-target={ "#resource-" + r.Kind + "-" + r.Name }
 						hx-swap="outerHTML"
 						hx-trigger="change"
@@ -132,7 +133,11 @@ templ ResourceCardView(r ResourceCard) {
 				}
 				{ r.Name }
 				<span class="text-xs uppercase tracking-wide text-gray-400 ml-2">{ r.Kind }</span>
+				if r.Virtual {
+					<span class="text-xs text-gray-400">(computed from contacts)</span>
+				}
 			</h2>
+			if !r.Virtual {
 				<button
 					class="text-red-600 hover:underline text-xs"
 					hx-delete={ resourceEndpoint(r.Kind) }
@@ -143,8 +148,10 @@ templ ResourceCardView(r ResourceCard) {
 				>
 					Delete
 				</button>
+			}
 		</div>
 
+		if !r.Virtual {
 			<ul class="divide-y divide-gray-100 mb-4">
 				for _, sh := range r.Shares {
 					<li class="py-2 flex items-center justify-between text-sm">
@@ -193,9 +200,17 @@ templ ResourceCardView(r ResourceCard) {
 					Share
 				</button>
 			</form>
+		}
 	</div>
 }
 
+func colorEndpoint(r ResourceCard) string {
+	if r.Virtual {
+		return "/web/resources/birthdays/color"
+	}
+	return "/web/resources/calendar/color"
+}
+
 func shareEndpoint(kind string) string {
 	if kind == "calendar" {
 		return "/web/shares/calendar"

internal/web/templates/dashboard_templ.go

@@ -23,6 +23,7 @@ type ResourceCard struct {
 	Name    string
 	Color   string // hex color like "#3b82f6"; only used for calendars
 	Shares  []ShareRow
+	Virtual bool // true for computed calendars (e.g. birthdays): no delete/sharing, just a color picker
 }
 
 // SharedWithMeItem describes a resource another user has shared with the
@@ -92,7 +93,7 @@ func Dashboard(username string, resources []ResourceCard, sharedWithMe []SharedW
 					var templ_7745c5c3_Var3 string
 					templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(item.Owner)
 					if templ_7745c5c3_Err != nil {
-						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 85, Col: 45}
+						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 86, Col: 45}
 					}
 					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
 					if templ_7745c5c3_Err != nil {
@@ -105,7 +106,7 @@ func Dashboard(username string, resources []ResourceCard, sharedWithMe []SharedW
 					var templ_7745c5c3_Var4 string
 					templ_7745c5c3_Var4, templ_7745c5c3_Err = templ.JoinStringErrs(item.Name)
 					if templ_7745c5c3_Err != nil {
-						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 85, Col: 68}
+						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 86, Col: 68}
 					}
 					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var4))
 					if templ_7745c5c3_Err != nil {
@@ -118,7 +119,7 @@ func Dashboard(username string, resources []ResourceCard, sharedWithMe []SharedW
 					var templ_7745c5c3_Var5 string
 					templ_7745c5c3_Var5, templ_7745c5c3_Err = templ.JoinStringErrs(item.Kind)
 					if templ_7745c5c3_Err != nil {
-						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 86, Col: 47}
+						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 87, Col: 47}
 					}
 					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var5))
 					if templ_7745c5c3_Err != nil {
@@ -131,7 +132,7 @@ func Dashboard(username string, resources []ResourceCard, sharedWithMe []SharedW
 					var templ_7745c5c3_Var6 string
 					templ_7745c5c3_Var6, templ_7745c5c3_Err = templ.JoinStringErrs(item.Permission)
 					if templ_7745c5c3_Err != nil {
-						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 88, Col: 83}
+						return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 89, Col: 83}
 					}
 					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var6))
 					if templ_7745c5c3_Err != nil {
@@ -233,7 +234,7 @@ func ResourceCardView(r ResourceCard) templ.Component {
 		var templ_7745c5c3_Var9 string
 		templ_7745c5c3_Var9, templ_7745c5c3_Err = templ.ResolveAttributeValue("resource-" + r.Kind + "-" + r.Name)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 113, Col: 46}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 114, Col: 46}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var9)
 		if templ_7745c5c3_Err != nil {
@@ -244,245 +245,288 @@ func ResourceCardView(r ResourceCard) templ.Component {
 			return templ_7745c5c3_Err
 		}
 		if r.Kind == "calendar" {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 15, "<form hx-post=\"/web/resources/calendar/color\" hx-target=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 15, "<form hx-post=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var10 string
-			templ_7745c5c3_Var10, templ_7745c5c3_Err = templ.ResolveAttributeValue("#resource-" + r.Kind + "-" + r.Name)
+			templ_7745c5c3_Var10, templ_7745c5c3_Err = templ.ResolveAttributeValue(colorEndpoint(r))
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 119, Col: 54}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 119, Col: 32}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var10)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 16, "\" hx-swap=\"outerHTML\" hx-trigger=\"change\"><input type=\"hidden\" name=\"name\" value=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 16, "\" hx-target=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var11 string
-			templ_7745c5c3_Var11, templ_7745c5c3_Err = templ.ResolveAttributeValue(r.Name)
+			templ_7745c5c3_Var11, templ_7745c5c3_Err = templ.ResolveAttributeValue("#resource-" + r.Kind + "-" + r.Name)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 123, Col: 53}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 120, Col: 54}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var11)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 17, "\"> <input name=\"color\" type=\"color\" value=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 17, "\" hx-swap=\"outerHTML\" hx-trigger=\"change\"><input type=\"hidden\" name=\"name\" value=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var12 string
-			templ_7745c5c3_Var12, templ_7745c5c3_Err = templ.ResolveAttributeValue(colorOrDefault(r.Color))
+			templ_7745c5c3_Var12, templ_7745c5c3_Err = templ.ResolveAttributeValue(r.Name)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 127, Col: 38}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 124, Col: 53}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var12)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 18, "\" title=\"Calendar color\" class=\"w-6 h-6 rounded border border-gray-300 p-0 align-middle\"></form>")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 18, "\"> <input name=\"color\" type=\"color\" value=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		}
 			var templ_7745c5c3_Var13 string
-		templ_7745c5c3_Var13, templ_7745c5c3_Err = templ.JoinStringErrs(r.Name)
+			templ_7745c5c3_Var13, templ_7745c5c3_Err = templ.ResolveAttributeValue(colorOrDefault(r.Color))
 			if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 133, Col: 12}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 128, Col: 38}
 			}
-		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var13))
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var13)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 19, " <span class=\"text-xs uppercase tracking-wide text-gray-400 ml-2\">")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 19, "\" title=\"Calendar color\" class=\"w-6 h-6 rounded border border-gray-300 p-0 align-middle\"></form>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
+		}
 		var templ_7745c5c3_Var14 string
-		templ_7745c5c3_Var14, templ_7745c5c3_Err = templ.JoinStringErrs(r.Kind)
+		templ_7745c5c3_Var14, templ_7745c5c3_Err = templ.JoinStringErrs(r.Name)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 134, Col: 77}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 134, Col: 12}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var14))
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 20, "</span></h2><button class=\"text-red-600 hover:underline text-xs\" hx-delete=\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 20, " <span class=\"text-xs uppercase tracking-wide text-gray-400 ml-2\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
 		var templ_7745c5c3_Var15 string
-		templ_7745c5c3_Var15, templ_7745c5c3_Err = templ.ResolveAttributeValue(resourceEndpoint(r.Kind))
+		templ_7745c5c3_Var15, templ_7745c5c3_Err = templ.JoinStringErrs(r.Kind)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 138, Col: 40}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 135, Col: 77}
 		}
-		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var15)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var15))
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 21, "\" hx-vals=\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 21, "</span> ")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if r.Virtual {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 22, "<span class=\"text-xs text-gray-400\">(computed from contacts)</span>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 23, "</h2>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !r.Virtual {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 24, "<button class=\"text-red-600 hover:underline text-xs\" hx-delete=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var16 string
-		templ_7745c5c3_Var16, templ_7745c5c3_Err = templ.ResolveAttributeValue(resourceVals(r.Name))
+			templ_7745c5c3_Var16, templ_7745c5c3_Err = templ.ResolveAttributeValue(resourceEndpoint(r.Kind))
 			if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 139, Col: 34}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 143, Col: 41}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var16)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 22, "\" hx-target=\"#resources\" hx-swap=\"outerHTML\" hx-confirm=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 25, "\" hx-vals=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var17 string
-		templ_7745c5c3_Var17, templ_7745c5c3_Err = templ.ResolveAttributeValue("Delete " + r.Kind + " " + r.Name + "? This removes all its data and cannot be undone.")
+			templ_7745c5c3_Var17, templ_7745c5c3_Err = templ.ResolveAttributeValue(resourceVals(r.Name))
 			if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 142, Col: 104}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 144, Col: 35}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var17)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 23, "\">Delete</button></div><ul class=\"divide-y divide-gray-100 mb-4\">")
-		if templ_7745c5c3_Err != nil {
-			return templ_7745c5c3_Err
-		}
-		for _, sh := range r.Shares {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 24, "<li class=\"py-2 flex items-center justify-between text-sm\"><span>")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 26, "\" hx-target=\"#resources\" hx-swap=\"outerHTML\" hx-confirm=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var18 string
-			templ_7745c5c3_Var18, templ_7745c5c3_Err = templ.JoinStringErrs(sh.SharedWith)
+			templ_7745c5c3_Var18, templ_7745c5c3_Err = templ.ResolveAttributeValue("Delete " + r.Kind + " " + r.Name + "? This removes all its data and cannot be undone.")
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 151, Col: 26}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 147, Col: 105}
 			}
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var18))
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var18)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 25, "</span> <span class=\"flex items-center gap-3\"><span class=\"text-xs uppercase tracking-wide text-gray-500\">")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 27, "\">Delete</button>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 28, "</div>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !r.Virtual {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 29, "<ul class=\"divide-y divide-gray-100 mb-4\">")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			for _, sh := range r.Shares {
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 30, "<li class=\"py-2 flex items-center justify-between text-sm\"><span>")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 				var templ_7745c5c3_Var19 string
-			templ_7745c5c3_Var19, templ_7745c5c3_Err = templ.JoinStringErrs(sh.Permission)
+				templ_7745c5c3_Var19, templ_7745c5c3_Err = templ.JoinStringErrs(sh.SharedWith)
 				if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 153, Col: 81}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 158, Col: 27}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var19))
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 26, "</span> <button class=\"text-red-600 hover:underline text-xs\" hx-delete=\"")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 31, "</span> <span class=\"flex items-center gap-3\"><span class=\"text-xs uppercase tracking-wide text-gray-500\">")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 				var templ_7745c5c3_Var20 string
-			templ_7745c5c3_Var20, templ_7745c5c3_Err = templ.ResolveAttributeValue(shareEndpoint(r.Kind))
+				templ_7745c5c3_Var20, templ_7745c5c3_Err = templ.JoinStringErrs(sh.Permission)
 				if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 156, Col: 40}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 160, Col: 82}
 				}
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var20)
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var20))
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 27, "\" hx-vals=\"")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 32, "</span> <button class=\"text-red-600 hover:underline text-xs\" hx-delete=\"")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 				var templ_7745c5c3_Var21 string
-			templ_7745c5c3_Var21, templ_7745c5c3_Err = templ.ResolveAttributeValue(shareVals(r.Name, sh.SharedWith))
+				templ_7745c5c3_Var21, templ_7745c5c3_Err = templ.ResolveAttributeValue(shareEndpoint(r.Kind))
 				if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 157, Col: 49}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 163, Col: 41}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var21)
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 28, "\" hx-target=\"")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 33, "\" hx-vals=\"")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 				var templ_7745c5c3_Var22 string
-			templ_7745c5c3_Var22, templ_7745c5c3_Err = templ.ResolveAttributeValue("#resource-" + r.Kind + "-" + r.Name)
+				templ_7745c5c3_Var22, templ_7745c5c3_Err = templ.ResolveAttributeValue(shareVals(r.Name, sh.SharedWith))
 				if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 158, Col: 55}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 164, Col: 50}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var22)
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 29, "\" hx-swap=\"outerHTML\" hx-confirm=\"")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 34, "\" hx-target=\"")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 				var templ_7745c5c3_Var23 string
-			templ_7745c5c3_Var23, templ_7745c5c3_Err = templ.ResolveAttributeValue("Remove access for " + sh.SharedWith + "?")
+				templ_7745c5c3_Var23, templ_7745c5c3_Err = templ.ResolveAttributeValue("#resource-" + r.Kind + "-" + r.Name)
 				if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 160, Col: 62}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 165, Col: 56}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var23)
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 30, "\">Remove</button></span></li>")
-			if templ_7745c5c3_Err != nil {
-				return templ_7745c5c3_Err
-			}
-		}
-		if len(r.Shares) == 0 {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 31, "<li class=\"py-2 text-sm text-gray-400\">Not shared with anyone yet.</li>")
-			if templ_7745c5c3_Err != nil {
-				return templ_7745c5c3_Err
-			}
-		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 32, "</ul><form class=\"flex flex-col sm:flex-row sm:items-end gap-2\" hx-post=\"")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 35, "\" hx-swap=\"outerHTML\" hx-confirm=\"")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 				var templ_7745c5c3_Var24 string
-		templ_7745c5c3_Var24, templ_7745c5c3_Err = templ.ResolveAttributeValue(shareEndpoint(r.Kind))
+				templ_7745c5c3_Var24, templ_7745c5c3_Err = templ.ResolveAttributeValue("Remove access for " + sh.SharedWith + "?")
 				if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 174, Col: 34}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 167, Col: 63}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var24)
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 33, "\" hx-target=\"")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 36, "\">Remove</button></span></li>")
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+			}
+			if len(r.Shares) == 0 {
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 37, "<li class=\"py-2 text-sm text-gray-400\">Not shared with anyone yet.</li>")
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+			}
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 38, "</ul><form class=\"flex flex-col sm:flex-row sm:items-end gap-2\" hx-post=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var25 string
-		templ_7745c5c3_Var25, templ_7745c5c3_Err = templ.ResolveAttributeValue("#resource-" + r.Kind + "-" + r.Name)
+			templ_7745c5c3_Var25, templ_7745c5c3_Err = templ.ResolveAttributeValue(shareEndpoint(r.Kind))
 			if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 175, Col: 51}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 181, Col: 35}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var25)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 34, "\" hx-swap=\"outerHTML\"><input type=\"hidden\" name=\"resource\" value=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 39, "\" hx-target=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var26 string
-		templ_7745c5c3_Var26, templ_7745c5c3_Err = templ.ResolveAttributeValue(r.Name)
+			templ_7745c5c3_Var26, templ_7745c5c3_Err = templ.ResolveAttributeValue("#resource-" + r.Kind + "-" + r.Name)
 			if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 178, Col: 54}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 182, Col: 52}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var26)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 35, "\"><div class=\"flex-1\"><label class=\"block text-xs text-gray-500 mb-1\">Username</label> <input name=\"shared_with\" type=\"text\" required class=\"w-full rounded-md border-gray-300 border px-2 py-1.5 text-sm\"></div><div><label class=\"block text-xs text-gray-500 mb-1\">Permission</label> <select name=\"permission\" class=\"w-full rounded-md border-gray-300 border px-2 py-1.5 text-sm\"><option value=\"read\">read</option> <option value=\"write\">write</option></select></div><button type=\"submit\" class=\"w-full sm:w-auto bg-indigo-600 text-white rounded-md px-3 py-1.5 text-sm font-medium hover:bg-indigo-700\">Share</button></form></div>")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 40, "\" hx-swap=\"outerHTML\"><input type=\"hidden\" name=\"resource\" value=\"")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var27 string
+			templ_7745c5c3_Var27, templ_7745c5c3_Err = templ.ResolveAttributeValue(r.Name)
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `internal/web/templates/dashboard.templ`, Line: 185, Col: 55}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var27)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 41, "\"><div class=\"flex-1\"><label class=\"block text-xs text-gray-500 mb-1\">Username</label> <input name=\"shared_with\" type=\"text\" required class=\"w-full rounded-md border-gray-300 border px-2 py-1.5 text-sm\"></div><div><label class=\"block text-xs text-gray-500 mb-1\">Permission</label> <select name=\"permission\" class=\"w-full rounded-md border-gray-300 border px-2 py-1.5 text-sm\"><option value=\"read\">read</option> <option value=\"write\">write</option></select></div><button type=\"submit\" class=\"w-full sm:w-auto bg-indigo-600 text-white rounded-md px-3 py-1.5 text-sm font-medium hover:bg-indigo-700\">Share</button></form>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 42, "</div>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -490,6 +534,13 @@ func ResourceCardView(r ResourceCard) templ.Component {
 	})
 }
 
+func colorEndpoint(r ResourceCard) string {
+	if r.Virtual {
+		return "/web/resources/birthdays/color"
+	}
+	return "/web/resources/calendar/color"
+}
+
 func shareEndpoint(kind string) string {
 	if kind == "calendar" {
 		return "/web/shares/calendar"