Remove hard line breaks from text pasted into the commit description

Do the same as when pasting a commit message with the commit menu, so
that the paragraphs of the body reflow when you edit them. This also
covers a commit message pasted into the summary, since everything after
its first line goes into the description.

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

pkg/gui/controllers/helpers/commits_helper.go

@@ -346,7 +346,11 @@ func (self *CommitsHelper) HandlePasteIntoDescription(text string) {
 		// pastes a whole commit message into the summary
 		text = strings.TrimLeft(text, "\n")
 	}
-	view.TextArea.TypeString(replaceTabsInPastedText(text))
+	// Remove the hard line breaks of the pasted text on its own, even if it
+	// goes into the middle of a line. Its line breaks come from the layout of
+	// the text that it was copied from, not from the line that it goes into.
+	text = self.TryRemoveHardLineBreaksIfAutoWrapping(replaceTabsInPastedText(text))
+	view.TextArea.TypeString(text)
 	view.RenderTextArea()
 }
 

pkg/integration/tests/commit/paste_multi_line_commit_message_with_hard_line_breaks.go

@@ -28,12 +28,7 @@ var PasteMultiLineCommitMessageWithHardLineBreaks = NewIntegrationTest(NewIntegr
 			GoToBeginning().
 			Type("Now ").
 			Content(Equals(
-				/* EXPECTED:
 				"Now The body of this commit was wrapped at the auto-wrap width when it \n" +
 					"was committed, so it contains a hard line break."))
-				ACTUAL: */
-				"Now The body of this commit was wrapped at the auto-wrap width when it \n" +
-					"was\n" +
-					"committed, so it contains a hard line break."))
 	},
 })