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 [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/Terminal.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
   import { claudeStore, type TerminalLine } from "$lib/stores/claude";
   import { afterUpdate } from "svelte";
+  import ConversationTabs from "./ConversationTabs.svelte";
 
   let terminalElement: HTMLDivElement;
   let shouldAutoScroll = true;
@@ -78,10 +79,12 @@
     <span class="text-sm terminal-header-text ml-2">Terminal</span>
   </div>
 
+  <ConversationTabs />
+
   <div
     bind:this={terminalElement}
     onscroll={handleScroll}
-    class="terminal-content h-[calc(100%-40px)] overflow-y-auto p-4 font-mono text-sm"
+    class="terminal-content h-[calc(100%-76px)] overflow-y-auto p-4 font-mono text-sm"
   >
     {#if lines.length === 0}
       <div class="terminal-waiting italic">