feat: stuffy feature bundle (#159)

## Summary

This PR bundles a collection of new features and quality-of-life improvements identified during a Claude CLI 2.1.50 audit.

- **Tab status indicator** — Tab stays yellow until the greeting is responded to, then turns green. Fixed disconnect not resetting to grey. Closes #157
- **Auth status display** — New "Account" section in settings sidebar showing login status, email, org, API key source, and Hikari override indicator. Includes login/logout buttons. Closes #153
- **CLI version badge** — New "Supported" badge showing the highest audited CLI version, colour-coded green/amber/red based on installed vs supported version. Closes #154 (bump to 2.1.50)
- **Rate limit events** — `rate_limit_event` messages from the stream are now parsed and shown as amber `[rate-limit]` lines in the terminal instead of being silently dropped. Closes #155
- **"Prompt is too long" handling** — Detects this error in assistant messages and shows a ⚡ Compact Conversation button to send `/compact` directly. Closes #158
- **`last_assistant_message` in Agent Monitor** — Extracts the agent's final output from the `ToolResult` content block in the JSON stream and displays it as a snippet on completed agent cards. Closes #156
- **`--worktree` flag** — New "Worktree isolation" toggle in session settings passes `--worktree` to Claude Code. Hook events (`WorktreeCreate`/`WorktreeRemove`) are displayed as green `[worktree]` lines. Closes #152, Closes #150
- **ConfigChange hook events** — `[ConfigChange Hook]` stderr events are now displayed as cyan `[config]` lines instead of errors. Closes #151
- **`CLAUDE_CODE_DISABLE_1M_CONTEXT` toggle** — New "Disable 1M context" setting in session configuration injects this env var into the Claude process. Closes #154

## Test plan

- [ ] Tab status indicator: start a new session and verify the tab stays yellow until Claude responds to the greeting, then turns green
- [ ] Auth status: open settings and verify the Account section shows correct login info
- [ ] CLI version badge: verify the "Supported 2.1.50" badge shows green when CLI matches
- [ ] Rate limit events: unit tests cover parsing; amber `[rate-limit]` lines display correctly
- [ ] Compact button: unit tests cover detection; button renders correctly in terminal
- [ ] Agent Monitor: use the Task tool and verify completed agent cards show a message snippet
- [ ] Worktree: enable toggle, start session, verify `--worktree` flag appears in process args
- [ ] ConfigChange: hook events display as `[config]` lines rather than errors
- [ ] Disable 1M context: enable toggle, start session, verify `CLAUDE_CODE_DISABLE_1M_CONTEXT=1` in `/proc/<pid>/environ`

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #159
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src/lib/components/ConfigSidebar.svelte

@@ -12,6 +12,7 @@
   } from "$lib/stores/config";
   import { claudeStore } from "$lib/stores/claude";
   import { getCurrentWindow } from "@tauri-apps/api/window";
+  import { invoke } from "@tauri-apps/api/core";
   import CostSummary from "./CostSummary.svelte";
 
   let config: HikariConfig = $state({
@@ -52,10 +53,26 @@
     budget_warning_threshold: 0.8,
     discord_rpc_enabled: true,
     show_thinking_blocks: true,
+    use_worktree: false,
+    disable_1m_context: false,
   });
 
   let showCustomThemeEditor = $state(false);
 
+  interface AuthStatus {
+    is_logged_in: boolean;
+    email: string | null;
+    org_name: string | null;
+    api_key_source: string | null;
+    api_provider: string | null;
+    subscription_type: string | null;
+  }
+
+  let authStatus: AuthStatus | null = $state(null);
+  let authLoading = $state(false);
+  let authActionLoading = $state(false);
+  let authError: string | null = $state(null);
+
   let isOpen = $state(false);
   let isSaving = $state(false);
   let saveError: string | null = $state(null);
@@ -69,6 +86,9 @@
 
   configStore.isSidebarOpen.subscribe((open) => {
     isOpen = open;
+    if (open && authStatus === null) {
+      void refreshAuthStatus();
+    }
   });
 
   configStore.saveError.subscribe((error) => {
@@ -111,6 +131,44 @@
     "Task",
   ];
 
+  async function refreshAuthStatus() {
+    authLoading = true;
+    authError = null;
+    try {
+      authStatus = await invoke<AuthStatus>("get_auth_status");
+    } catch (e) {
+      authError = String(e);
+    } finally {
+      authLoading = false;
+    }
+  }
+
+  async function handleAuthLogin() {
+    authActionLoading = true;
+    authError = null;
+    try {
+      await invoke<string>("auth_login");
+      await refreshAuthStatus();
+    } catch (e) {
+      authError = String(e);
+    } finally {
+      authActionLoading = false;
+    }
+  }
+
+  async function handleAuthLogout() {
+    authActionLoading = true;
+    authError = null;
+    try {
+      await invoke<string>("auth_logout");
+      await refreshAuthStatus();
+    } catch (e) {
+      authError = String(e);
+    } finally {
+      authActionLoading = false;
+    }
+  }
+
   async function handleSave() {
     isSaving = true;
     saveError = null;
@@ -228,6 +286,101 @@
       </div>
     {/if}
 
+    <!-- Account Section -->
+    <section class="mb-6">
+      <h3 class="text-sm font-medium text-[var(--accent-primary)] uppercase tracking-wider mb-3">
+        Account
+      </h3>
+
+      {#if authLoading}
+        <div class="text-sm text-[var(--text-secondary)] py-2">Checking auth status...</div>
+      {:else if authStatus}
+        <div class="flex items-center gap-2 mb-3">
+          <span
+            class="inline-block w-2.5 h-2.5 rounded-full flex-shrink-0 {authStatus.is_logged_in
+              ? 'bg-green-500'
+              : 'bg-red-500'}"
+          ></span>
+          <span class="text-sm font-medium text-[var(--text-primary)]">
+            {authStatus.is_logged_in ? "Logged in" : "Not logged in"}
+          </span>
+        </div>
+        {#if authStatus.email || authStatus.org_name || authStatus.api_key_source || config.api_key}
+          <dl class="text-xs space-y-1 mb-3">
+            {#if authStatus.email}
+              <div class="flex gap-2">
+                <dt class="text-[var(--text-tertiary)] w-20 flex-shrink-0">Email</dt>
+                <dd class="text-[var(--text-primary)] break-all">{authStatus.email}</dd>
+              </div>
+            {/if}
+            {#if authStatus.org_name}
+              <div class="flex gap-2">
+                <dt class="text-[var(--text-tertiary)] w-20 flex-shrink-0">Org</dt>
+                <dd class="text-[var(--text-primary)]">{authStatus.org_name}</dd>
+              </div>
+            {/if}
+            {#if authStatus.api_key_source}
+              <div class="flex gap-2">
+                <dt class="text-[var(--text-tertiary)] w-20 flex-shrink-0">API key</dt>
+                <dd class="text-[var(--text-primary)]">{authStatus.api_key_source}</dd>
+              </div>
+            {/if}
+            {#if authStatus.subscription_type}
+              <div class="flex gap-2">
+                <dt class="text-[var(--text-tertiary)] w-20 flex-shrink-0">Plan</dt>
+                <dd class="text-[var(--text-primary)]">{authStatus.subscription_type}</dd>
+              </div>
+            {/if}
+            <div class="flex gap-2">
+              <dt class="text-[var(--text-tertiary)] w-20 flex-shrink-0">Override</dt>
+              <dd class="text-[var(--text-primary)]">
+                {#if config.api_key}
+                  {config.streamer_mode ? "Custom key set 🔒" : "Custom key set"}
+                {:else}
+                  None
+                {/if}
+              </dd>
+            </div>
+          </dl>
+        {/if}
+      {:else}
+        <div class="text-sm text-[var(--text-secondary)] py-2">Auth status unavailable</div>
+      {/if}
+
+      {#if authError}
+        <div class="mb-3 p-2 bg-red-500/20 border border-red-500/50 rounded text-red-400 text-xs">
+          {authError}
+        </div>
+      {/if}
+
+      <div class="flex gap-2">
+        <button
+          onclick={refreshAuthStatus}
+          disabled={authLoading || authActionLoading}
+          class="px-3 py-1.5 text-sm bg-[var(--bg-primary)] border border-[var(--border-color)] rounded-lg text-[var(--text-secondary)] hover:border-[var(--accent-primary)] hover:text-[var(--text-primary)] transition-colors disabled:opacity-50"
+        >
+          Refresh
+        </button>
+        {#if authStatus && !authStatus.is_logged_in}
+          <button
+            onclick={handleAuthLogin}
+            disabled={authActionLoading}
+            class="btn-trans-gradient px-3 py-1.5 text-sm rounded-lg disabled:opacity-50"
+          >
+            {authActionLoading ? "Logging in..." : "Login"}
+          </button>
+        {:else if authStatus && authStatus.is_logged_in}
+          <button
+            onclick={handleAuthLogout}
+            disabled={authActionLoading}
+            class="px-3 py-1.5 text-sm bg-red-500/20 border border-red-500/50 rounded-lg text-red-400 hover:bg-red-500/30 transition-colors disabled:opacity-50"
+          >
+            {authActionLoading ? "Logging out..." : "Logout"}
+          </button>
+        {/if}
+      </div>
+    </section>
+
     <!-- Agent Settings Section -->
     <section class="mb-6">
       <h3 class="text-sm font-medium text-[var(--accent-primary)] uppercase tracking-wider mb-3">
@@ -322,6 +475,37 @@
           class="w-full px-3 py-2 bg-[var(--bg-primary)] border border-[var(--border-color)] rounded-lg text-[var(--text-primary)] focus:outline-none focus:border-[var(--accent-primary)] resize-none"
         ></textarea>
       </div>
+
+      <!-- Worktree Isolation -->
+      <div class="mb-4">
+        <label class="flex items-center gap-3 cursor-pointer">
+          <input
+            type="checkbox"
+            bind:checked={config.use_worktree}
+            class="w-4 h-4 rounded border-[var(--border-color)] bg-[var(--bg-primary)] text-[var(--accent-primary)] focus:ring-[var(--accent-primary)]"
+          />
+          <span class="text-sm text-[var(--text-primary)]">Worktree isolation</span>
+        </label>
+        <p class="text-xs text-[var(--text-tertiary)] mt-1 ml-7">
+          Launch sessions with <code class="font-mono">--worktree</code> for isolated git worktree environments
+        </p>
+      </div>
+
+      <!-- Disable 1M Context Window -->
+      <div class="mb-4">
+        <label class="flex items-center gap-3 cursor-pointer">
+          <input
+            type="checkbox"
+            bind:checked={config.disable_1m_context}
+            class="w-4 h-4 rounded border-[var(--border-color)] bg-[var(--bg-primary)] text-[var(--accent-primary)] focus:ring-[var(--accent-primary)]"
+          />
+          <span class="text-sm text-[var(--text-primary)]">Disable 1M context window</span>
+        </label>
+        <p class="text-xs text-[var(--text-tertiary)] mt-1 ml-7">
+          Sets <code class="font-mono">CLAUDE_CODE_DISABLE_1M_CONTEXT=1</code> to opt out of the extended
+          context window
+        </p>
+      </div>
     </section>
 
     <!-- Greeting Section -->