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/mcp_server/context.py

@@ -1,8 +1,8 @@
 """Per-request client identity for MCP calls.
 
-MCP clients identify themselves via an ``X-Voicebox-Client-Id`` HTTP header
+MCP clients identify themselves via an ``X-TalkBox-Client-Id`` HTTP header
 (direct-HTTP clients set it in their MCP config; the stdio shim forwards it
-from the ``VOICEBOX_CLIENT_ID`` env var). Middleware copies the value into a
+from the ``TALKBOX_CLIENT_ID`` env var). Middleware copies the value into a
 ContextVar so tool implementations can read it without plumbing the request
 object through every service call.
 """
@@ -25,7 +25,7 @@ logger = logging.getLogger(__name__)
 # don't get garbage-collected mid-flight (cf. asyncio.create_task docs).
 _pending_stamps: set[asyncio.Task] = set()
 
-CLIENT_ID_HEADER = "X-Voicebox-Client-Id"
+CLIENT_ID_HEADER = "X-TalkBox-Client-Id"
 
 # Tool handlers read this to apply per-client voice bindings.
 current_client_id: ContextVar[str | None] = ContextVar(
@@ -33,7 +33,7 @@ current_client_id: ContextVar[str | None] = ContextVar(
 )
 
 # Remote address of the in-flight request. Used by tools that gate
-# host-filesystem access to loopback callers (see voicebox.transcribe).
+# host-filesystem access to loopback callers (see talkbox.transcribe).
 current_remote_addr: ContextVar[str | None] = ContextVar(
     "current_remote_addr", default=None
 )
@@ -54,26 +54,26 @@ def request_is_loopback() -> bool:
     except ValueError:
         return False
 
-# Endpoints that consume X-Voicebox-Client-Id for its MCP-semantic
+# Endpoints that consume X-TalkBox-Client-Id for its MCP-semantic
 # meaning (per-client profile resolution + per-client default_personality).
 # These are the paths where a stamp into last_seen_at is accurate.
 # Unrelated REST traffic that happens to set the header is intentionally
 # ignored so the Settings UI's "last heard from" column only reflects
 # calls that actually acted on the client's bindings.
 #
-# - /mcp — FastMCP tool calls (voicebox.speak, voicebox.transcribe, …)
+# - /mcp — FastMCP tool calls (talkbox.speak, talkbox.transcribe, …)
 #   and the /mcp/bindings admin surface. The admin surface is never
 #   called with the header in practice (the frontend manages bindings
 #   over plain REST), so the `startswith("/mcp")` match doesn't cause
 #   false stamps.
-# - /speak — REST mirror of voicebox.speak for non-MCP agents (shell
+# - /speak — REST mirror of talkbox.speak for non-MCP agents (shell
 #   scripts, ACP, A2A). Uses the same per-client binding lookup, so its
 #   callers belong in the last-seen list too.
 _STAMPED_PATH_PREFIXES: tuple[str, ...] = ("/mcp", "/speak")
 
 
 class ClientIdMiddleware(BaseHTTPMiddleware):
-    """Copy X-Voicebox-Client-Id into a ContextVar and stamp last_seen_at
+    """Copy X-TalkBox-Client-Id into a ContextVar and stamp last_seen_at
     for requests that act on the caller's MCP bindings."""
 
     def __init__(self, app: ASGIApp) -> None: