feat: add ability to run multiple agents via tabbed views (#47)

### Explanation

_No response_

### Issue

Closes #30 Closes #41

### Attestations

- [ ] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [ ] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [ ] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [ ] I have pinned the dependencies to a specific patch version.

### Style

- [ ] I have run the linter and resolved any errors.
- [ ] My pull request uses an appropriate title, matching the conventional commit standards.
- [ ] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

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### Versioning

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Reviewed-on: #47
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src-tauri/src/types.rs

@@ -172,6 +172,8 @@ pub struct DeltaContent {
 pub struct StateChangeEvent {
     pub state: CharacterState,
     pub tool_name: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub conversation_id: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -179,6 +181,8 @@ pub struct OutputEvent {
     pub line_type: String,
     pub content: String,
     pub tool_name: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub conversation_id: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -187,6 +191,29 @@ pub struct PermissionPromptEvent {
     pub tool_name: String,
     pub tool_input: serde_json::Value,
     pub description: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub conversation_id: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ConnectionEvent {
+    pub status: ConnectionStatus,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub conversation_id: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SessionEvent {
+    pub session_id: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub conversation_id: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WorkingDirectoryEvent {
+    pub directory: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub conversation_id: Option<String>,
 }
 
 #[cfg(test)]
@@ -294,6 +321,7 @@ mod tests {
         let event = StateChangeEvent {
             state: CharacterState::Coding,
             tool_name: Some("Edit".to_string()),
+            conversation_id: None,
         };
 
         let serialized = serde_json::to_string(&event).unwrap();
@@ -307,6 +335,7 @@ mod tests {
             line_type: "assistant".to_string(),
             content: "Test output".to_string(),
             tool_name: None,
+            conversation_id: None,
         };
 
         let serialized = serde_json::to_string(&event).unwrap();