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

scripts/prepare-release.sh

@@ -7,14 +7,14 @@ set -e
 
 echo "🔑 Checking for signing keys..."
 
-if [ ! -f ~/.tauri/voicebox.key ]; then
-  echo "❌ Private key not found at ~/.tauri/voicebox.key"
-  echo "Run: cd tauri && bun tauri signer generate -w ~/.tauri/voicebox.key"
+if [ ! -f ~/.tauri/talkbox.key ]; then
+  echo "❌ Private key not found at ~/.tauri/talkbox.key"
+  echo "Run: cd tauri && bun tauri signer generate -w ~/.tauri/talkbox.key"
   exit 1
 fi
 
-if [ ! -f ~/.tauri/voicebox.key.pub ]; then
-  echo "❌ Public key not found at ~/.tauri/voicebox.key.pub"
+if [ ! -f ~/.tauri/talkbox.key.pub ]; then
+  echo "❌ Public key not found at ~/.tauri/talkbox.key.pub"
   exit 1
 fi
 
@@ -27,14 +27,14 @@ if grep -q "REPLACE_WITH_YOUR_PUBLIC_KEY" tauri/src-tauri/tauri.conf.json; then
   echo ""
   echo "Add this to tauri/src-tauri/tauri.conf.json:"
   echo ""
-  cat ~/.tauri/voicebox.key.pub
+  cat ~/.tauri/talkbox.key.pub
   echo ""
   exit 1
 fi
 
 echo "🔧 Setting up environment..."
 
-export TAURI_SIGNING_PRIVATE_KEY="$(cat ~/.tauri/voicebox.key)"
+export TAURI_SIGNING_PRIVATE_KEY="$(cat ~/.tauri/talkbox.key)"
 export TAURI_SIGNING_PRIVATE_KEY_PASSWORD=""
 
 echo "✅ Environment configured"