Show a different message when participant is active on unshared project

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

crates/call/src/participant.rs

@@ -1,28 +1,37 @@
 use anyhow::{anyhow, Result};
 use client::{proto, User};
+use gpui::WeakModelHandle;
+use project::Project;
 use std::sync::Arc;
 
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
 pub enum ParticipantLocation {
-    Project { project_id: u64 },
+    SharedProject { project_id: u64 },
+    UnsharedProject,
     External,
 }
 
 impl ParticipantLocation {
     pub fn from_proto(location: Option<proto::ParticipantLocation>) -> Result<Self> {
         match location.and_then(|l| l.variant) {
-            Some(proto::participant_location::Variant::Project(project)) => Ok(Self::Project {
-                project_id: project.id,
-            }),
+            Some(proto::participant_location::Variant::SharedProject(project)) => {
+                Ok(Self::SharedProject {
+                    project_id: project.id,
+                })
+            }
+            Some(proto::participant_location::Variant::UnsharedProject(_)) => {
+                Ok(Self::UnsharedProject)
+            }
             Some(proto::participant_location::Variant::External(_)) => Ok(Self::External),
             None => Err(anyhow!("participant location was not provided")),
         }
     }
 }
 
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Default)]
 pub struct LocalParticipant {
     pub projects: Vec<proto::ParticipantProject>,
+    pub active_project: Option<WeakModelHandle<Project>>,
 }
 
 #[derive(Clone, Debug)]