cli: Be less confusing when asking for passphrase

The previous error didn't really make sense.

radicle-cli/src/commands/auth.rs

@@ -178,10 +178,10 @@ pub fn authenticate(options: Options, profile: &Profile) -> anyhow::Result<()> {
             );
 
             let passphrase = if options.stdin {
-                term::passphrase_stdin()
+                term::passphrase_stdin()?
             } else {
-                term::passphrase(RAD_PASSPHRASE)
-            }?;
+                term::passphrase(RAD_PASSPHRASE)?
+            };
             register(&mut agent, profile, passphrase)?;
 
             term::success!("Radicle key added to {}", term::format::dim("ssh-agent"));

radicle-cli/src/commands/node/control.rs

@@ -3,7 +3,6 @@ use std::fs::{File, OpenOptions};
 use std::io::{BufRead, BufReader, Read, Seek, SeekFrom};
 use std::{process, thread, time};
 
-use anyhow::Context as _;
 use localtime::LocalTime;
 
 use radicle::node;
@@ -30,10 +29,10 @@ pub fn start(
     }
     let envs = if profile.keystore.is_encrypted()? {
         // Ask passphrase here, otherwise it'll be a fatal error when running the daemon
-        // without `RAD_PASSPHRASE`. To keep things consistent, we also use this in foreground mode.
-        let passphrase = term::io::passphrase(profile::env::RAD_PASSPHRASE)
-            .context(format!("`{}` must be set", profile::env::RAD_PASSPHRASE))?;
-
+        // without `RAD_PASSPHRASE`.
+        let Ok(passphrase) = term::io::passphrase(profile::env::RAD_PASSPHRASE) else {
+            anyhow::bail!("your radicle passphrase is required to start your node");
+        };
         Some((profile::env::RAD_PASSPHRASE, passphrase))
     } else {
         None

radicle-term/src/io.rs

@@ -199,7 +199,7 @@ where
     Ok(value)
 }
 
-pub fn passphrase<K: AsRef<OsStr>>(var: K) -> Result<Passphrase, anyhow::Error> {
+pub fn passphrase<K: AsRef<OsStr>>(var: K) -> Result<Passphrase, inquire::InquireError> {
     if let Ok(p) = env::var(var) {
         Ok(Passphrase::from(p))
     } else {