personality: bool API, i18n across the app

- Collapse intent tri-state (respond/rewrite/compose) to `personality: bool` on /generate, /speak, and voicebox.speak. Drop respond entirely; keep compose as a standalone button via /profiles/{id}/compose. Remove /rewrite, /respond, and /speak profile endpoints.
- FloatingGenerateBox: Wand2 persona toggle + Dices compose button appear when the selected profile has a personality. ProfileCard badges Wand2 alongside the effects Sparkles.
- MCP bindings: default_intent column → default_personality: bool. Migration drops the legacy column.
- i18n: en / ja / zh-CN / zh-TW translation files filled out and wired through the capture, server, and profile UI.

```ts
voicebox.speak({
  text: "Deploy complete.",
  profile: "Morgan",
  personality: true, // rewrite through the profile's personality LLM
});
```

backend/database/migrations.py

@@ -35,6 +35,7 @@ def run_migrations(engine) -> None:
     _migrate_effect_presets(engine, inspector, tables)
     _migrate_generation_versions(engine, inspector, tables)
     _migrate_capture_settings(engine, inspector, tables)
+    _migrate_mcp_bindings(engine, inspector, tables)
     _normalize_storage_paths(engine, tables)
 
 
@@ -233,6 +234,30 @@ def _migrate_capture_settings(engine, inspector, tables: set[str]) -> None:
         )
 
 
+def _migrate_mcp_bindings(engine, inspector, tables: set[str]) -> None:
+    """Drop the legacy ``default_intent`` column and add ``default_personality``.
+
+    The intent tri-state (respond / rewrite / compose) has been collapsed
+    to a boolean: when true, ``voicebox.speak`` rewrites input through the
+    profile's personality LLM before TTS.
+    """
+    if "mcp_client_bindings" not in tables:
+        return
+    columns = _get_columns(inspector, "mcp_client_bindings")
+    if "default_personality" not in columns:
+        _add_column(
+            engine,
+            "mcp_client_bindings",
+            "default_personality BOOLEAN NOT NULL DEFAULT 0",
+            "default_personality",
+        )
+    if "default_intent" in columns:
+        with engine.connect() as conn:
+            conn.execute(text("ALTER TABLE mcp_client_bindings DROP COLUMN default_intent"))
+            conn.commit()
+        logger.info("Dropped legacy default_intent column from mcp_client_bindings")
+
+
 def _normalize_storage_paths(engine, tables: set[str]) -> None:
     """Normalize stored file paths to be relative to the configured data dir."""
     from pathlib import Path