Detail: personality picker beside Re-summarize

Chips: Neutral / Sarcastic / Funny / Dry wit. The chosen voice rides
the reprocess call and the button echoes it ('Re-summarize · Sarcastic');
an existing summary shows '· in a sarcastic voice' next to its heading.
compileKotlin + 39 unit tests green.

shared/com/shonar/recording/AiContent.kt

@@ -37,6 +37,8 @@ data class SummaryData(
     val version: Int,
     val provider: String = "",
     val model: String? = null,
+    /** Voice the summary was written in ("sarcastic", …); null = neutral. */
+    val tone: String? = null,
     /** Raw content dict; known keys read via [summaryString]/[summaryList]. */
     val content: Map<String, Any?> = emptyMap(),
     val editedByUser: Boolean = false,
@@ -112,6 +114,7 @@ fun parseSummary(raw: String): SummaryData? = runCatching {
         version = json.optInt("version", 0),
         provider = json.optString("provider", ""),
         model = json.optString("model", null).takeUnless { it.isNullOrBlank() },
+        tone = json.optString("tone", null).takeUnless { it.isNullOrBlank() },
         content = content,
         editedByUser = json.optBoolean("edited_by_user", false),
     )