Mute mics by default

Fix bug when file ends in line with 1 more digit displayed than previous lines
Remove stale UI elements from voice call development

crates/call/Cargo.toml

@@ -36,6 +36,10 @@ anyhow.workspace = true
 async-broadcast = "0.4"
 futures.workspace = true
 postage.workspace = true
+schemars.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+serde_derive.workspace = true
 
 [dev-dependencies]
 client = { path = "../client", features = ["test-support"] }