Fix speaker diarization: WAV conversion, pyannote 4.0 compat, telemetry bug

- Convert non-WAV audio to 16kHz mono WAV before diarization (pyannote
  v4.0.4 AudioDecoder returns None duration for FLAC, causing crash)
- Handle pyannote 4.0 DiarizeOutput return type (unwrap .speaker_diarization)
- Disable pyannote telemetry (np.isfinite(None) bug with max_speakers)
- Use huggingface_hub.login() to persist token for all sub-downloads
- Pre-download sub-models (segmentation-3.0, speaker-diarization-community-1)
- Add third required model license link in settings UI
- Improve SpeakerManager hints based on settings state
- Add word-wrap to transcript text

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/components/SettingsModal.svelte

@@ -118,12 +118,14 @@
             <p>Speaker detection uses <strong>pyannote.audio</strong> models hosted on HuggingFace. You must accept the license for each model:</p>
             <ol>
               <li>Create a free account at <!-- svelte-ignore a11y_no_static_element_interactions --><a class="ext-link" onclick={() => openUrl('https://huggingface.co/join')}>huggingface.co</a></li>
-              <li>Accept the license on <strong>each</strong> of these pages:
+              <li>Accept the license on <strong>all three</strong> of these pages:
                 <ul>
                   <!-- svelte-ignore a11y_no_static_element_interactions -->
                   <li><a class="ext-link" onclick={() => openUrl('https://huggingface.co/pyannote/speaker-diarization-3.1')}>pyannote/speaker-diarization-3.1</a></li>
                   <!-- svelte-ignore a11y_no_static_element_interactions -->
                   <li><a class="ext-link" onclick={() => openUrl('https://huggingface.co/pyannote/segmentation-3.0')}>pyannote/segmentation-3.0</a></li>
+                  <!-- svelte-ignore a11y_no_static_element_interactions -->
+                  <li><a class="ext-link" onclick={() => openUrl('https://huggingface.co/pyannote/speaker-diarization-community-1')}>pyannote/speaker-diarization-community-1</a></li>
                 </ul>
               </li>
               <!-- svelte-ignore a11y_no_static_element_interactions -->

src/lib/components/SpeakerManager.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
   import { speakers } from '$lib/stores/transcript';
+  import { settings } from '$lib/stores/settings';
   import type { Speaker } from '$lib/types/transcript';
 
   let editingSpeakerId = $state<string | null>(null);
@@ -35,10 +36,13 @@
   <h3>Speakers</h3>
   {#if $speakers.length === 0}
     <p class="empty-hint">No speakers detected</p>
-    <p class="setup-hint">
-      Speaker detection requires a HuggingFace token.
-      Set the <code>HF_TOKEN</code> environment variable and restart.
-    </p>
+    {#if $settings.skip_diarization}
+      <p class="setup-hint">Speaker detection is disabled. Enable it in Settings &gt; Speakers.</p>
+    {:else if !$settings.hf_token}
+      <p class="setup-hint">Speaker detection requires a HuggingFace token. Configure it in Settings &gt; Speakers.</p>
+    {:else}
+      <p class="setup-hint">Speaker detection ran but found no distinct speakers, or the model may need to be downloaded. Check Settings &gt; Speakers.</p>
+    {/if}
   {:else}
     <ul class="speaker-list">
       {#each $speakers as speaker (speaker.id)}

src/lib/components/TranscriptEditor.svelte

@@ -217,6 +217,8 @@
   .segment-text {
     line-height: 1.6;
     padding-left: 0.75rem;
+    word-wrap: break-word;
+    overflow-wrap: break-word;
   }
   .word {
     cursor: pointer;