Speaker corrections: rename / merge / reassign + voice learning

Native editor to fix speaker-ID errors after transcription (modeled on recap-relay's
correction UX): rename a speaker in the legend, merge two speakers, or reassign an
individual transcript line. Saving rewrites speakers.json, re-renders transcript.md +
recap.html, and updates the voiceprint memory — so a correction compounds: naming an
"Unknown" speaker teaches that voice for future calls.

- SpeakerEditing (pure, tested): replaceSpeaker (rename = merge-onto-existing),
  reassign, netNameMap (compose ops), and remap (apply a name map to a recap's
  structured fields + whole-word free text, so summaries/extras update without re-LLM).
- RecapEditModel (@MainActor): loads speakers.json (+ optional recap.json +
  cluster_fingerprints.json); on save writes the resolved speakers.json, re-renders,
  and reconciles voiceprints — merge keeps the survivor's print; rename/name-an-Unknown
  enrolls the cluster's fingerprint under the new name.
- TranscriptEditorView (SwiftUI) + EditorWindow (AppKit window for the LSUIElement app);
  menu gains "Edit speakers".
- Pipeline now persists cluster_fingerprints.json (every cluster incl. Unknown) and
  recap.json (RecapFile) so the editor can learn voices + re-render offline.
- RecapModels made Codable; TranscriptAssembler exposes allFingerprints;
  VoiceprintStore gains enroll() + merge().

52/52 XCTest (6 new, incl. a full rename→artifacts→voiceprint round-trip on disk).

Ten31Transcripts/Session/TranscriptAssembler.swift

@@ -11,7 +11,8 @@ enum TranscriptAssembler {
 
     struct Assembled {
         let speakersFile: SpeakersFile
-        let fingerprints: [String: [Float]]   // name -> 192-dim, for VoiceprintStore
+        let fingerprints: [String: [Float]]      // confidently-named only, for VoiceprintStore
+        let allFingerprints: [String: [Float]]   // EVERY cluster incl. Unknown — for editor voice-learning
     }
 
     /// Source ranking when the same name appears across chunks with different sources.
@@ -33,6 +34,7 @@ enum TranscriptAssembler {
         var segments: [SpeakersFile.Segment] = []
         var bestSpeaker: [String: SpeakersFile.Speaker] = [:]
         var fingerprints: [String: [Float]] = [:]
+        var allFingerprints: [String: [Float]] = [:]
         var models: [String: String] = [:]
         var duration = 0.0
 
@@ -58,13 +60,14 @@ enum TranscriptAssembler {
                 } else {
                     bestSpeaker[sp.name] = candidate
                 }
-                // Collect named fingerprints only (never Unknown_N / Speaker_unknown).
-                if !isUnknown(sp.name), let fp = sp.fingerprint, fp.count > 0 {
-                    fingerprints[sp.name] = fp
+                if let fp = sp.fingerprint, fp.count > 0 {
+                    allFingerprints[sp.name] = fp                          // every cluster, for the editor
+                    if !isUnknown(sp.name) { fingerprints[sp.name] = fp }   // named only, for the store
                 }
             }
-            for (name, fp) in chunk.response.fingerprints where !isUnknown(name) && fp.count > 0 {
-                fingerprints[name] = fp
+            for (name, fp) in chunk.response.fingerprints where fp.count > 0 {
+                allFingerprints[name] = fp
+                if !isUnknown(name) { fingerprints[name] = fp }
             }
         }
 
@@ -75,6 +78,6 @@ enum TranscriptAssembler {
         let file = SpeakersFile(
             sessionId: sessionId, app: app, durationSec: duration,
             speakers: speakers, segments: segments, models: models)
-        return Assembled(speakersFile: file, fingerprints: fingerprints)
+        return Assembled(speakersFile: file, fingerprints: fingerprints, allFingerprints: allFingerprints)
     }
 }