fix(workspace): hidden bullet actions on phones, no second extract, notice layout

- The floating bullet actions only react to hover on devices with a real
  pointer; a tap on a phone made the invisible buttons clickable.
- A bullet that is only a note link (plus hashtags) can no longer be
  extracted: button and /extract are hidden, the server answers 400.
- Extract notice on phones sits above the bottom navigation, text on
  top (two lines max) with the actions below.
- Release v0.26.1.

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

internal/api/restructure.go

@@ -29,7 +29,7 @@ func restructureStatus(err error) int {
 		return http.StatusConflict
 	case errors.Is(err, storage.ErrBlockNotFound), errors.Is(err, storage.ErrDocNotFound):
 		return http.StatusNotFound
-	case errors.Is(err, storage.ErrMergeSelf), errors.Is(err, storage.ErrDocInTrash):
+	case errors.Is(err, storage.ErrMergeSelf), errors.Is(err, storage.ErrDocInTrash), errors.Is(err, storage.ErrAlreadyNote):
 		return http.StatusBadRequest
 	case errors.Is(err, storage.ErrMergeNotOwner):
 		return http.StatusForbidden

internal/api/restructure_test.go

@@ -84,6 +84,23 @@ func TestExtractBranchIntoOwnNote(t *testing.T) {
 	}
 }
 
+func TestExtractRejectsBulletThatIsOnlyANoteLink(t *testing.T) {
+	srv, store, token := setupTestServer(t)
+	router := srv.Router()
+	claims, _ := auth.ValidateToken(testJWTSecret, token)
+	src, _ := store.CreateDocument(claims.UserID, "", "Projekt", "", "", []domain.DocumentBlock{
+		{ID: "blk_l", Type: "bullet", Content: "[[Konzept: Garten]] #draußen", Level: 0, Position: 1},
+		{ID: "blk_m", Type: "bullet", Content: "Siehe [[Konzept: Garten]] für Details", Level: 0, Position: 2},
+	}, nil, false)
+	if rec := sessionCall(router, "POST", "/api/v1/documents/"+src.ID+"/extract", token, `{"blockId":"blk_l"}`, ""); rec.Code != http.StatusBadRequest {
+		t.Fatalf("link-only bullet: want 400, got %d %s", rec.Code, rec.Body.String())
+	}
+	// A link inside other text is ordinary content
+	if rec := sessionCall(router, "POST", "/api/v1/documents/"+src.ID+"/extract", token, `{"blockId":"blk_m"}`, ""); rec.Code != http.StatusCreated {
+		t.Fatalf("bullet with text and link: want 201, got %d %s", rec.Code, rec.Body.String())
+	}
+}
+
 func TestExtractInSharedNoteKeepsAccess(t *testing.T) {
 	srv, store, _ := setupTestServer(t)
 	router := srv.Router()

internal/storage/restructure.go

@@ -20,6 +20,7 @@ var (
 	ErrBlockNotFound = errors.New("Punkt nicht gefunden")
 	ErrBranchLocked  = errors.New("Jemand anderes bearbeitet gerade einen Punkt in diesem Ast. Bitte kurz warten.")
 	ErrMergeSelf     = errors.New("Eine Notiz kann nicht mit sich selbst zusammengeführt werden")
+	ErrAlreadyNote   = errors.New("Dieser Punkt verweist schon auf eine eigene Notiz")
 	ErrMergeNotOwner = errors.New("Zusammenführen geht nur mit eigenen Notizen als Quelle")
 )
 
@@ -37,6 +38,8 @@ func (s *Store) readCollabDoc(docID string) (*collab.Doc, error) {
 var (
 	titlePrefixRe = regexp.MustCompile(`^(\s*(-|\*|#{1,6}|\[[ xX]?\])\s+)+`)
 	titleTagRe    = regexp.MustCompile(`(^|\s)#[\p{L}0-9_-]+`)
+	// A bullet that is only a link to a note (with hashtags), as left behind by ExtractBranch
+	noteLinkOnlyRe = regexp.MustCompile(`^\s*\[\[[^\]]+\]\](\s+#[\p{L}0-9_-]+)*\s*$`)
 )
 
 // branchTitle makes a note title from a bullet's text (without hashtags) and returns the hashtags,
@@ -116,6 +119,9 @@ func (s *Store) ExtractBranch(userID, docID, blockID string, a collab.Actor, lea
 		return nil, "", ErrBlockNotFound
 	}
 	root := flat[start]
+	if noteLinkOnlyRe.MatchString(root.Content) {
+		return nil, "", ErrAlreadyNote
+	}
 	var children []domain.DocumentBlock
 	ids := []string{root.ID}
 	for i := start + 1; i < len(flat) && flat[i].Level > root.Level; i++ {