Take in as much of a Regular's outer punctuation as a reason spells

A mention extended over a stored name's optional outer punctuation only
when the reason spelled all of it, so "Like your Beef Chili!" left the
mention of "Beef Chili!!" at "Beef Chili" while "Chili!" extended through
its "!", and neither covered the other. Extend through the longest portion
of the punctuation the reason spells after which the border still holds,
at either end of the name.

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

internal/ai/skills/suggest_side_quests_test.go

@@ -258,6 +258,11 @@ func TestSuggestSideQuestsReasonMentionRule(t *testing.T) {
 		"spacing after punctuation":    {[]string{"¡Beef Chili"}, "Your ¡ Beef Chili is our inspiration.", "¡Beef Chili", ""},
 		"stored spacing left off":      {[]string{"Beef Chili !", "Chili!"}, "Like your Beef Chili!", "Beef Chili !", ""},
 		"inside unspaced punctuation":  {[]string{"Beef Chili !", "Chili!"}, "Like your Beef Chili!", "Chili!", none},
+		"stored punctuation partly":    {[]string{"Beef Chili!!", "Chili!"}, "Like your Beef Chili!", "Beef Chili!!", ""},
+		"inside partial punctuation":   {[]string{"Beef Chili!!", "Chili!"}, "Like your Beef Chili!", "Chili!", none},
+		"partly then a letter":         {[]string{"Beef Chili!!", "Chili!"}, "Your Beef Chili!!X is our inspiration.", "Chili!", none},
+		"leading punctuation partly":   {[]string{"¡¡Beef Chili", "¡Beef"}, "Like your ¡Beef Chili.", "¡¡Beef Chili", ""},
+		"inside partial leading":       {[]string{"¡¡Beef Chili", "¡Beef"}, "Like your ¡Beef Chili.", "¡Beef", none},
 		"stored symbol left off":       {[]string{"Green Chili 🌶"}, "Like your Green Chili, gone green.", "Green Chili 🌶", none},
 		"stored accent left off":       {[]string{"Chicken Cafe\u0301"}, "Like your Chicken Cafe, gone green.", "Chicken Cafe\u0301", none},
 		"accent written after name":    {[]string{"Chicken Cafe"}, "Like your Chicken Cafe\u0301, gone green.", "Chicken Cafe", none},