Stream Whisper verbose metadata live without overflowing Reverb.

Persist accumulated verbose_json on the recording and broadcast only transcript/whisper deltas so the show page can render language, segments, word timestamps, and confidence while a run is in progress.

tests/Feature/Recordings/IndexTest.php

@@ -125,12 +125,37 @@ class IndexTest extends TestCase
 
         Livewire::test(Index::class)
             ->assertSee('wire:poll', false)
+            ->assertDontSee('echo-private', false)
             ->assertSee('Transcribing')
             ->assertSee('40%')
             ->assertDontSee('Transcribing locally…')
             ->assertSeeHtml('bg-amber-400');
     }
 
+    public function test_processing_recordings_do_not_show_zero_percent(): void
+    {
+        $user = User::factory()->create();
+        $this->actingAs($user);
+
+        Recording::query()->create([
+            'user_id' => $user->id,
+            'title' => 'Just started',
+            'original_filename' => 'fresh.mp3',
+            'file_path' => 'recordings/fresh.mp3',
+            'file_size_bytes' => 100,
+            'transcription_status' => 'processing',
+            'transcription_progress' => 'Transcribing locally…',
+            'transcription_percent' => 0,
+            'transcription_driver' => 'local',
+            'transcription_started_at' => now(),
+        ]);
+
+        Livewire::test(Index::class)
+            ->assertSee('Just started')
+            ->assertSee('Transcribing')
+            ->assertDontSee('0%');
+    }
+
     public function test_queued_recordings_do_not_show_fake_percent(): void
     {
         $user = User::factory()->create();