Fix hostname logic as suggested in PR review

- Use owner_name in hostname when agent_name is provided: agent.workspace.owner.coder
- Keep simple format when no agent_name: workspace.coder
- Update tests to match the corrected hostname formats

Implements the suggestion from PR review comment.

Co-authored-by: matifali <[email protected]>

Author: blink-so[bot]

registry/coder/modules/zed/main.test.ts

@@ -17,7 +17,7 @@ describe("zed", async () => {
       agent_id: "foo",
     });
     expect(state.outputs.zed_url.value).toBe(
-      "zed://ssh/default.default.coder",
+      "zed://ssh/default.coder",
     );
 
     const coder_app = state.resources.find(
@@ -35,7 +35,7 @@ describe("zed", async () => {
       folder: "/foo/bar",
     });
     expect(state.outputs.zed_url.value).toBe(
-      "zed://ssh/default.default.coder/foo/bar",
+      "zed://ssh/default.coder/foo/bar",
     );
   });
 
@@ -75,7 +75,7 @@ describe("zed", async () => {
       agent_name: "myagent",
     });
     expect(state.outputs.zed_url.value).toBe(
-      "zed://ssh/myagent.default.me.coder",
+      "zed://ssh/myagent.default.default.coder",
     );
   });
 });

registry/coder/modules/zed/main.tf

@@ -57,7 +57,7 @@ locals {
   workspace_name = lower(data.coder_workspace.me.name)
   owner_name     = lower(data.coder_workspace_owner.me.name)
   agent_name     = lower(var.agent_name)
-  hostname       = var.agent_name != "" ? "${local.agent_name}.${local.workspace_name}.me.coder" : "${local.workspace_name}.${local.owner_name}.coder"
+  hostname       = var.agent_name != "" ? "${local.agent_name}.${local.workspace_name}.${local.owner_name}.coder" : "${local.workspace_name}.coder"
 }
 
 resource "coder_app" "zed" {