rebrand: rename VoiceBox to TalkBox throughout codebase

- All 'voicebox'/'Voicebox'/'VOICEBOX' strings replaced with 'talkbox'/'TalkBox'/'TALKBOX'
- Port changed from 17493 to 17494 (avoids conflict with upstream VoiceBox)
- MCP tool namespace: voicebox.* -> talkbox.*
- App bundle ID: sh.voicebox.app -> com.talkbox.app
- Binary names: voicebox-server -> talkbox-server, voicebox-mcp -> talkbox-mcp
- Docker user/group: voicebox -> talkbox
- Database: voicebox.db -> talkbox.db
- Env vars: VOICEBOX_* -> TALKBOX_*
- Asset files renamed: voicebox-logo.* -> talkbox-logo.*, etc.
- External binaries in tauri.conf.json updated to talkbox-server/talkbox-mcp

backend/utils/chunked_tts.py

@@ -15,7 +15,7 @@ from typing import List, Tuple
 
 import numpy as np
 
-logger = logging.getLogger("voicebox.chunked-tts")
+logger = logging.getLogger("talkbox.chunked-tts")
 
 # Default chunk size in characters.  Can be overridden per-request via
 # the ``max_chunk_chars`` field on GenerationRequest.