chore: remove tor from startos core

Tor is being moved from a built-in OS feature to a service. This removes
the Arti-based Tor client, onion address management, hidden service
creation, and all related code from the core backend, frontend, and SDK.

- Delete core/src/net/tor/ module (~2060 lines)
- Remove OnionAddress, TorSecretKey, TorController from all consumers
- Remove HostnameInfo::Onion and HostAddress::Onion variants
- Remove onion CRUD RPC endpoints and tor subcommand
- Remove tor key handling from account and backup/restore
- Remove ~12 tor-related Cargo dependencies (arti-client, torut, etc.)
- Remove tor UI components, API methods, mock data, and routes
- Remove OnionHostname and tor patterns/regexes from SDK
- Add v0_4_0_alpha_20 database migration to strip onion data
- Bump version to 0.4.0-alpha.20

core/src/account.rs

@@ -8,7 +8,6 @@ use openssl::x509::X509;
 use crate::db::model::DatabaseModel;
 use crate::hostname::{Hostname, generate_hostname, generate_id};
 use crate::net::ssl::{gen_nistp256, make_root_cert};
-use crate::net::tor::TorSecretKey;
 use crate::prelude::*;
 use crate::util::serde::Pem;
 
@@ -26,7 +25,6 @@ pub struct AccountInfo {
     pub server_id: String,
     pub hostname: Hostname,
     pub password: String,
-    pub tor_keys: Vec<TorSecretKey>,
     pub root_ca_key: PKey<Private>,
     pub root_ca_cert: X509,
     pub ssh_key: ssh_key::PrivateKey,
@@ -36,7 +34,6 @@ impl AccountInfo {
     pub fn new(password: &str, start_time: SystemTime) -> Result<Self, Error> {
         let server_id = generate_id();
         let hostname = generate_hostname();
-        let tor_key = vec![TorSecretKey::generate()];
         let root_ca_key = gen_nistp256()?;
         let root_ca_cert = make_root_cert(&root_ca_key, &hostname, start_time)?;
         let ssh_key = ssh_key::PrivateKey::from(ssh_key::private::Ed25519Keypair::random(
@@ -48,7 +45,6 @@ impl AccountInfo {
             server_id,
             hostname,
             password: hash_password(password)?,
-            tor_keys: tor_key,
             root_ca_key,
             root_ca_cert,
             ssh_key,
@@ -61,17 +57,6 @@ impl AccountInfo {
         let hostname = Hostname(db.as_public().as_server_info().as_hostname().de()?);
         let password = db.as_private().as_password().de()?;
         let key_store = db.as_private().as_key_store();
-        let tor_addrs = db
-            .as_public()
-            .as_server_info()
-            .as_network()
-            .as_host()
-            .as_onions()
-            .de()?;
-        let tor_keys = tor_addrs
-            .into_iter()
-            .map(|tor_addr| key_store.as_onion().get_key(&tor_addr))
-            .collect::<Result<_, _>>()?;
         let cert_store = key_store.as_local_certs();
         let root_ca_key = cert_store.as_root_key().de()?.0;
         let root_ca_cert = cert_store.as_root_cert().de()?.0;
@@ -82,7 +67,6 @@ impl AccountInfo {
             server_id,
             hostname,
             password,
-            tor_keys,
             root_ca_key,
             root_ca_cert,
             ssh_key,
@@ -97,17 +81,6 @@ impl AccountInfo {
         server_info
             .as_pubkey_mut()
             .ser(&self.ssh_key.public_key().to_openssh()?)?;
-        server_info
-            .as_network_mut()
-            .as_host_mut()
-            .as_onions_mut()
-            .ser(
-                &self
-                    .tor_keys
-                    .iter()
-                    .map(|tor_key| tor_key.onion_address())
-                    .collect(),
-            )?;
         server_info.as_password_hash_mut().ser(&self.password)?;
         db.as_private_mut().as_password_mut().ser(&self.password)?;
         db.as_private_mut()
@@ -117,9 +90,6 @@ impl AccountInfo {
             .as_developer_key_mut()
             .ser(Pem::new_ref(&self.developer_key))?;
         let key_store = db.as_private_mut().as_key_store_mut();
-        for tor_key in &self.tor_keys {
-            key_store.as_onion_mut().insert_key(tor_key)?;
-        }
         let cert_store = key_store.as_local_certs_mut();
         if cert_store.as_root_cert().de()?.0 != self.root_ca_cert {
             cert_store
@@ -148,11 +118,5 @@ impl AccountInfo {
             self.hostname.no_dot_host_name(),
             self.hostname.local_domain_name(),
         ]
-        .into_iter()
-        .chain(
-            self.tor_keys
-                .iter()
-                .map(|k| InternedString::from_display(&k.onion_address())),
-        )
     }
 }