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

web/projects/ui/src/app/services/api/embassy-mock-api.service.ts

@@ -281,17 +281,6 @@ export class MockApiService extends ApiService {
     }
   }
 
-  async getTorLogs(params: RR.GetServerLogsReq): Promise<RR.GetServerLogsRes> {
-    await pauseFor(2000)
-    const entries = this.randomLogs(params.limit)
-
-    return {
-      entries,
-      startCursor: 'start-cursor',
-      endCursor: 'end-cursor',
-    }
-  }
-
   async getKernelLogs(
     params: RR.GetServerLogsReq,
   ): Promise<RR.GetServerLogsRes> {
@@ -315,16 +304,6 @@ export class MockApiService extends ApiService {
     }
   }
 
-  async followTorLogs(
-    params: RR.FollowServerLogsReq,
-  ): Promise<RR.FollowServerLogsRes> {
-    await pauseFor(2000)
-    return {
-      startCursor: 'start-cursor',
-      guid: 'logs-guid',
-    }
-  }
-
   async followKernelLogs(
     params: RR.FollowServerLogsReq,
   ): Promise<RR.FollowServerLogsRes> {
@@ -504,11 +483,6 @@ export class MockApiService extends ApiService {
     return null
   }
 
-  async resetTor(params: RR.ResetTorReq): Promise<RR.ResetTorRes> {
-    await pauseFor(2000)
-    return null
-  }
-
   // marketplace URLs
 
   async checkOSUpdate(
@@ -1374,16 +1348,6 @@ export class MockApiService extends ApiService {
     return null
   }
 
-  async addTorKey(params: RR.AddTorKeyReq): Promise<RR.AddTorKeyRes> {
-    await pauseFor(2000)
-    return 'vanityabcdefghijklmnop.onion'
-  }
-
-  async generateTorKey(params: RR.GenerateTorKeyReq): Promise<RR.AddTorKeyRes> {
-    await pauseFor(2000)
-    return 'abcdefghijklmnopqrstuv.onion'
-  }
-
   async serverBindingToggleGateway(
     params: RR.ServerBindingToggleGatewayReq,
   ): Promise<RR.ServerBindingToggleGatewayRes> {
@@ -1401,53 +1365,6 @@ export class MockApiService extends ApiService {
     return null
   }
 
-  async serverAddOnion(params: RR.ServerAddOnionReq): Promise<RR.AddOnionRes> {
-    await pauseFor(2000)
-
-    const patch: Operation<any>[] = [
-      {
-        op: PatchOp.ADD,
-        path: `/serverInfo/host/onions/0`,
-        value: params.onion,
-      },
-      {
-        op: PatchOp.ADD,
-        path: `/serverInfo/host/hostnameInfo/80/0`,
-        value: {
-          kind: 'onion',
-          hostname: {
-            port: 80,
-            sslPort: 443,
-            value: params.onion,
-          },
-        },
-      },
-    ]
-    this.mockRevision(patch)
-
-    return null
-  }
-
-  async serverRemoveOnion(
-    params: RR.ServerRemoveOnionReq,
-  ): Promise<RR.RemoveOnionRes> {
-    await pauseFor(2000)
-
-    const patch: RemoveOperation[] = [
-      {
-        op: PatchOp.REMOVE,
-        path: `/serverInfo/host/onions/0`,
-      },
-      {
-        op: PatchOp.REMOVE,
-        path: `/serverInfo/host/hostnameInfo/80/-1`,
-      },
-    ]
-    this.mockRevision(patch)
-
-    return null
-  }
-
   async osUiAddPublicDomain(
     params: RR.OsUiAddPublicDomainReq,
   ): Promise<RR.OsUiAddPublicDomainRes> {
@@ -1574,53 +1491,6 @@ export class MockApiService extends ApiService {
     return null
   }
 
-  async pkgAddOnion(params: RR.PkgAddOnionReq): Promise<RR.AddOnionRes> {
-    await pauseFor(2000)
-
-    const patch: Operation<any>[] = [
-      {
-        op: PatchOp.ADD,
-        path: `/packageData/${params.package}/hosts/${params.host}/onions/0`,
-        value: params.onion,
-      },
-      {
-        op: PatchOp.ADD,
-        path: `/packageData/${params.package}/hosts/${params.host}/hostnameInfo/80/0`,
-        value: {
-          kind: 'onion',
-          hostname: {
-            port: 80,
-            sslPort: 443,
-            value: params.onion,
-          },
-        },
-      },
-    ]
-    this.mockRevision(patch)
-
-    return null
-  }
-
-  async pkgRemoveOnion(
-    params: RR.PkgRemoveOnionReq,
-  ): Promise<RR.RemoveOnionRes> {
-    await pauseFor(2000)
-
-    const patch: RemoveOperation[] = [
-      {
-        op: PatchOp.REMOVE,
-        path: `/packageData/${params.package}/hosts/${params.host}/onions/0`,
-      },
-      {
-        op: PatchOp.REMOVE,
-        path: `/packageData/${params.package}/hosts/${params.host}/hostnameInfo/80/0`,
-      },
-    ]
-    this.mockRevision(patch)
-
-    return null
-  }
-
   async pkgAddPublicDomain(
     params: RR.PkgAddPublicDomainReq,
   ): Promise<RR.PkgAddPublicDomainRes> {