feat(transcript): show per-segment timestamps in live and finalized views

src/lib/views/TranscriptNotes.svelte

@@ -35,6 +35,17 @@
     return speakers.find((s) => s.label === label)?.display_name ?? label;
   }
 
+  // Transcript timestamps: segment start_ms → "m:ss" (or "h:mm:ss" past an
+  // hour). Shown as a quiet monospace prefix so a line reads "0:42 Alice: …".
+  function fmtTs(ms: number): string {
+    const total = Math.floor(ms / 1000);
+    const h = Math.floor(total / 3600);
+    const m = Math.floor((total % 3600) / 60);
+    const s = total % 60;
+    const mm = h ? String(m).padStart(2, "0") : String(m);
+    return `${h ? `${h}:` : ""}${mm}:${String(s).padStart(2, "0")}`;
+  }
+
   // T8.7/FR-TRX-4: the meeting view shows the language actually used, not
   // just the raw ISO code — falls back to the code itself if it's not in
   // the (curated) catalog, and to "auto-detecting…" before any is known.
@@ -266,7 +277,11 @@
             <p class="muted">No transcript for this meeting.</p>
           {:else}
             {#each m.segments as s (s.id)}
-              <p><strong>{speakerName(s.speaker, m.speakers)}:</strong> {s.text}</p>
+              <p>
+                <span class="ts">{fmtTs(s.start_ms)}</span>
+                <strong>{speakerName(s.speaker, m.speakers)}:</strong>
+                {s.text}
+              </p>
             {/each}
           {/if}
         {/if}
@@ -428,6 +443,7 @@
                   class:active={open}
                   onclick={() => (selectedSegmentMs = open ? null : s.start_ms)}
                 >
+                  <span class="ts">{fmtTs(s.start_ms)}</span>
                   <strong>{speakerName(s.speaker)}:</strong>
                   {s.text}
                   {#if hasNote}
@@ -561,6 +577,14 @@
   .note-badge {
     margin-left: 0.3rem;
   }
+  /* Transcript timestamp: a quiet monospace prefix, not competing with the
+     speaker name or text for attention. */
+  .ts {
+    font-family: var(--font-mono, ui-monospace, monospace);
+    font-size: 0.78em;
+    color: var(--muted);
+    margin-right: 0.15rem;
+  }
   .segment-note-input {
     display: block;
     width: 100%;