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

### Explanation

_No response_

### Issue

Closes #30 Closes #41

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- [ ] 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/lib/components/StatusBar.svelte

@@ -9,6 +9,7 @@
   import { getVersion } from "@tauri-apps/api/app";
   import { open } from "@tauri-apps/plugin-dialog";
   import { openUrl } from "@tauri-apps/plugin-opener";
+  import { get } from "svelte/store";
   import { claudeStore } from "$lib/stores/claude";
   import { configStore, type HikariConfig } from "$lib/stores/config";
   import type { ConnectionStatus } from "$lib/types/messages";
@@ -87,7 +88,12 @@
     ];
 
     try {
+      const conversationId = get(claudeStore.activeConversationId);
+      if (!conversationId) {
+        throw new Error("No active conversation");
+      }
       await invoke("start_claude", {
+        conversationId,
         options: {
           working_dir: targetDir,
           model: currentConfig.model || null,
@@ -105,7 +111,11 @@
 
   async function handleDisconnect() {
     try {
-      await invoke("stop_claude");
+      const conversationId = get(claudeStore.activeConversationId);
+      if (!conversationId) {
+        throw new Error("No active conversation");
+      }
+      await invoke("stop_claude", { conversationId });
     } catch (error) {
       console.error("Failed to stop Claude:", error);
     }