feat(ui): absorb button in peek, preserve newlines, demote promoted items

Stream peek now shows absorb button for unpromoted entries. Promoted
items in stream show demote instead of delete. d double-tap demotes
any card_type entity regardless of view. Parsers preserve newlines
from Shift+Enter. Absorb popup truncates to first non-empty line.

internal/parse/grammar.go

@@ -212,60 +212,58 @@ func tryPrefixTime(r *Result, text string) (string, bool) {
 // extractModifiers extracts tags, flags, time anchors, and card suffixes from text.
 // handleFlags controls whether !pin is extracted (true for body, false for title/desc in some contexts).
 func extractModifiers(r *Result, text string, handleFlags bool) (string, error) {
-	tokens := strings.Fields(text)
-	var parts []string
 	seen := map[string]bool{}
 	for _, t := range r.Tags {
 		seen[strings.ToLower(t)] = true
 	}
 
-	for _, tok := range tokens {
-		switch {
-		// !pin flag
-		case handleFlags && strings.EqualFold(tok, "!pin"):
-			r.Pin = true
+	var outLines []string
+	for _, line := range strings.Split(text, "\n") {
+		tokens := strings.Fields(line)
+		var lineParts []string
+		for _, tok := range tokens {
+			switch {
+			case handleFlags && strings.EqualFold(tok, "!pin"):
+				r.Pin = true
 
-		// ##word escape → literal #word in body
-		case strings.HasPrefix(tok, "##") && len(tok) > 2:
-			parts = append(parts, "#"+tok[2:])
+			case strings.HasPrefix(tok, "##") && len(tok) > 2:
+				lineParts = append(lineParts, "#"+tok[2:])
 
-		// @time inline time anchor (for todos: sets due_at)
-		// If not valid time format, keep as body text
-		case strings.HasPrefix(tok, "@") && len(tok) > 1:
-			timeStr := tok[1:]
-			if validateTime(timeStr) != nil {
-				parts = append(parts, tok)
-			} else if r.TimeAnchor != nil {
-				return "", fmt.Errorf("multiple time anchors")
-			} else {
-				r.TimeAnchor = &timeStr
+			case strings.HasPrefix(tok, "@") && len(tok) > 1:
+				timeStr := tok[1:]
+				if validateTime(timeStr) != nil {
+					lineParts = append(lineParts, tok)
+				} else if r.TimeAnchor != nil {
+					return "", fmt.Errorf("multiple time anchors")
+				} else {
+					r.TimeAnchor = &timeStr
+				}
+
+			case strings.HasPrefix(tok, "#") && len(tok) > 1:
+				tag := strings.ToLower(tok[1:])
+				if !seen[tag] {
+					r.Tags = append(r.Tags, tag)
+					seen[tag] = true
+				}
+
+			case strings.HasPrefix(tok, "^") && len(tok) > 1:
+				suffix := tok[1:]
+				cardType, ok := validCardTypes[suffix]
+				if !ok {
+					return "", fmt.Errorf("invalid card type %q", suffix)
+				}
+				if r.CardSuffix != nil {
+					return "", fmt.Errorf("multiple card suffixes")
+				}
+				r.CardSuffix = &cardType
+
+			default:
+				lineParts = append(lineParts, tok)
 			}
-
-		// #tag extraction (lowercased, deduplicated)
-		case strings.HasPrefix(tok, "#") && len(tok) > 1:
-			tag := strings.ToLower(tok[1:])
-			if !seen[tag] {
-				r.Tags = append(r.Tags, tag)
-				seen[tag] = true
-			}
-
-		// ^card suffix (kept for now, spec says remove later)
-		case strings.HasPrefix(tok, "^") && len(tok) > 1:
-			suffix := tok[1:]
-			cardType, ok := validCardTypes[suffix]
-			if !ok {
-				return "", fmt.Errorf("invalid card type %q", suffix)
-			}
-			if r.CardSuffix != nil {
-				return "", fmt.Errorf("multiple card suffixes")
-			}
-			r.CardSuffix = &cardType
-
-		default:
-			parts = append(parts, tok)
 		}
+		outLines = append(outLines, strings.Join(lineParts, " "))
 	}
-	return strings.Join(parts, " "), nil
+	return strings.Join(outLines, "\n"), nil
 }
 
 func validateTime(s string) error {

internal/parse/grammar_test.go

@@ -94,6 +94,11 @@ func TestParse(t *testing.T) {
 		{"inline desc", "body text // inline desc", "body text", "note", nil, sp("inline desc"), nil, nil, nil, false, false, nil, ""},
 		{"url no split", "http://example.com // should not split", "http://example.com // should not split", "note", nil, nil, nil, nil, nil, false, false, nil, ""},
 
+		// Multiline body preserves newlines
+		{"multiline body", "hello\nworld", "hello\nworld", "note", nil, nil, nil, nil, nil, false, false, nil, ""},
+		{"multiline with tags", "line one #ops\nline two", "line one\nline two", "note", nil, nil, nil, []string{"ops"}, nil, false, false, nil, ""},
+		{"title multiline body", "|my title\nfirst line\nsecond line", "first line\nsecond line", "note", sp("my title"), nil, nil, nil, nil, false, false, nil, ""},
+
 		// Edge cases
 		{"empty input", "", "", "", nil, nil, nil, nil, nil, false, false, nil, "empty"},
 		{"only glyph", "-", "", "", nil, nil, nil, nil, nil, false, false, nil, "empty body"},