chore: biome lint cleanup — formatting, unused imports, exhaustive-deps fixes

- Backend: fix redis-bridge.ts import formatting
- Frontend: fix formatting in messages/view, recordings/view, ambient-canvas, voice-stage
- Frontend: remove unused imports/vars in EditHistory, ambient-canvas
- Frontend: fix import sorting in LiveModerationFeed
- Frontend: suppress caller-controlled exhaustive-deps in use-gsap-animation
- All services: lint clean, typecheck pass, build pass
- Backend e2e tests excluded (require live server, expected 404s)

services/frontend/src/components/LiveModerationFeed.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { CheckCircle2, ShieldAlert, UserX, VolumeX } from "lucide-react";
-import { useRef, useEffect } from "react";
+import { useEffect, useRef } from "react";
 import { Badge } from "@/components/primitives";
 import { formatRelativeTime } from "@/lib/format";
 import type { ModerationAction } from "@/lib/types";
@@ -81,7 +81,7 @@ export function LiveModerationFeed({
         el.style.removeProperty("animation-timing-function");
       });
     };
-  }, [actions.length]);
+  }, []);
 
   return (
     <div className="flex max-h-[460px] flex-col">