feat: automated task loop panel with per-task conversation orchestration

Implements issue #179. Adds a Task Loop panel that imports hikari-tasks.json
files and automatically runs Claude Code through each task in sequence, one
per conversation tab. Includes Start/Pause/Stop/Resume controls, real-time
status indicators per task, and a StatusBar badge. WSL UNC paths from the
file picker are normalised to Unix paths at import time.

src/lib/components/NavMenu.svelte

@@ -22,6 +22,7 @@
   import ProjectContextPanel from "./ProjectContextPanel.svelte";
   import PrdPanel from "./PrdPanel.svelte";
   import ChangelogPanel from "./ChangelogPanel.svelte";
+  import TaskLoopPanel from "./TaskLoopPanel.svelte";
   import { injectTextStore } from "$lib/stores/projectContext";
 
   const DISCORD_URL = "https://chat.nhcarrigan.com";
@@ -65,6 +66,7 @@
   let showProjectContext = $state(false);
   let showPrdPanel = $state(false);
   let showChangelog = $state(false);
+  let showTaskLoop = $state(false);
 
   const progress = $derived($achievementProgress);
   const activeAgentCount = $derived($runningAgentCount);
@@ -230,6 +232,19 @@
       <span>PRD Creator</span>
     </button>
 
+    <!-- Task Loop -->
+    <button onclick={menuAction(() => (showTaskLoop = true))} class="nav-item">
+      <svg class="w-5 h-5 shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          stroke-width="2"
+          d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"
+        />
+      </svg>
+      <span>Task Loop</span>
+    </button>
+
     <!-- File Editor -->
     <button
       onclick={menuAction(() => editorStore.toggleEditor())}
@@ -494,6 +509,10 @@
   <ChangelogPanel onClose={() => (showChangelog = false)} />
 {/if}
 
+{#if showTaskLoop}
+  <TaskLoopPanel onClose={() => (showTaskLoop = false)} />
+{/if}
+
 <style>
   .nav-item {
     display: flex;