session: receipt words keep paths and code words literal

A decided receipt capitalised every answer, so a chosen file src/c.txt read
Src/c.txt. Only a plain phrase gains a capital now, matching the desktop tray.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

Author: santoshkumarradha

internal/session/question_outcomes.go

@@ -1,6 +1,7 @@
 package session
 
 import (
+	"regexp"
 	"sort"
 	"strings"
 	"sync"
@@ -108,11 +109,19 @@ func decidedOutcome(record DecisionRecord) QuestionOutcome {
 	}
 }
 
+// plainPhrase is a run of plain words: a first word of lowercase letters only,
+// followed by more words. Only such a phrase gains a capital.
+var plainPhrase = regexp.MustCompile(`^[a-z]+\s+\S`)
+
+// sentenceCase capitalises a plain phrase ("not now") and leaves everything
+// else literal, because an answer is often a path, a file name or a lone code
+// word ("src/c.txt", "json") whose case is part of what it means. The desktop
+// tray applies the same rule, so the receipt and the button read alike.
 func sentenceCase(text string) string {
-	first, size := utf8.DecodeRuneInString(text)
-	if first == utf8.RuneError {
+	if !plainPhrase.MatchString(text) {
 		return text
 	}
+	first, size := utf8.DecodeRuneInString(text)
 	return string(unicode.ToUpper(first)) + text[size:]
 }
 

internal/session/question_outcomes_case_test.go

@@ -0,0 +1,20 @@
+package session
+
+import "testing"
+
+// A receipt repeats the person's choice. A path or a code word keeps its case,
+// because "Src/c.txt" names a different file than the one that was chosen.
+func TestReceiptWordsKeepPathsAndCodeWordsLiteral(t *testing.T) {
+	for in, want := range map[string]string{
+		"not now":    "Not now",
+		"src/c.txt":  "src/c.txt",
+		"notes.md":   "notes.md",
+		"json":       "json",
+		"Allow once": "Allow once",
+		"":           "",
+	} {
+		if got := sentenceCase(in); got != want {
+			t.Errorf("sentenceCase(%q) = %q, want %q", in, got, want)
+		}
+	}
+}