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/provider/CustomShonarProvider.kt

@@ -311,11 +311,16 @@ class CustomShonarProvider(
      *  per-recording override). 409 = stage already running or nothing to
      *  summarize; surfaced as ProviderError.Transient with the server's
      *  detail message. */
-    suspend fun reprocess(recordingId: String, job: String, model: String? = null): String =
+    suspend fun reprocess(recordingId: String, job: String, model: String? = null,
+                          tone: String? = null): String =
         withContext(Dispatchers.IO) {
             ensureConnected()
             val base = currentOrigin()
-            val q = if (model != null) "&model=$model" else ""
+            val q = buildString {
+                if (model != null) append("&model=$model")
+                if (tone != null)
+                    append("&tone=").append(java.net.URLEncoder.encode(tone, "UTF-8"))
+            }
             executeAuthed(base) { token ->
                 post(base, "/api/v1/recordings/$recordingId/reprocess?job=$job$q", token, "{}")
             }.use { resp ->