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/CliVersion.svelte

@@ -2,15 +2,43 @@
   import { invoke } from "@tauri-apps/api/core";
   import { onMount } from "svelte";
 
-  let version = $state("Loading...");
+  const SUPPORTED_CLI_VERSION = "2.1.50";
+
+  let installedVersion = $state("Loading...");
+
+  function compareVersions(a: string, b: string): number {
+    const aParts = a.split(".").map(Number);
+    const bParts = b.split(".").map(Number);
+    for (let i = 0; i < Math.max(aParts.length, bParts.length); i++) {
+      const aVal = aParts[i] ?? 0;
+      const bVal = bParts[i] ?? 0;
+      if (aVal > bVal) return 1;
+      if (aVal < bVal) return -1;
+    }
+    return 0;
+  }
+
+  let displayVersion = $derived(installedVersion.split(" (")[0]);
+
+  let supportedBadgeState = $derived.by(() => {
+    if (installedVersion === "Loading..." || installedVersion === "Unknown") {
+      return "neutral";
+    }
+    const semverMatch = /(\d+\.\d+\.\d+)/.exec(installedVersion);
+    if (!semverMatch) return "neutral";
+    const cmp = compareVersions(semverMatch[1], SUPPORTED_CLI_VERSION);
+    if (cmp > 0) return "ahead";
+    if (cmp < 0) return "behind";
+    return "current";
+  });
 
   async function fetchVersion() {
     try {
       const result = await invoke<string>("get_claude_version");
-      version = result;
+      installedVersion = result;
     } catch (error) {
       console.error("Failed to get Claude CLI version:", error);
-      version = "Unknown";
+      installedVersion = "Unknown";
     }
   }
 
@@ -19,25 +47,60 @@
   });
 </script>
 
-<div class="cli-version">
-  <svg
-    class="terminal-icon"
-    width="14"
-    height="14"
-    viewBox="0 0 24 24"
-    fill="none"
-    stroke="currentColor"
-    stroke-width="2"
-    stroke-linecap="round"
-    stroke-linejoin="round"
-  >
-    <polyline points="4 17 10 11 4 5" />
-    <line x1="12" y1="19" x2="20" y2="19" />
-  </svg>
-  <span class="version-text">CLI {version}</span>
+<div class="cli-versions">
+  <div class="cli-version">
+    <svg
+      class="terminal-icon"
+      width="14"
+      height="14"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      stroke-width="2"
+      stroke-linecap="round"
+      stroke-linejoin="round"
+    >
+      <polyline points="4 17 10 11 4 5" />
+      <line x1="12" y1="19" x2="20" y2="19" />
+    </svg>
+    <span class="version-text">CLI {displayVersion}</span>
+  </div>
+
+  <div class="cli-version supported {supportedBadgeState}" title="Highest audited CLI version">
+    <svg
+      class="terminal-icon"
+      width="14"
+      height="14"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      stroke-width="2"
+      stroke-linecap="round"
+      stroke-linejoin="round"
+    >
+      <path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z" />
+    </svg>
+    <span class="version-text">Supported {SUPPORTED_CLI_VERSION}</span>
+  </div>
+
+  {#if supportedBadgeState === "ahead"}
+    <span class="version-warning ahead"
+      >Your version is newer, some features may not be supported</span
+    >
+  {:else if supportedBadgeState === "behind"}
+    <span class="version-warning behind"
+      >Your version is out of date, please update to ensure compatibility</span
+    >
+  {/if}
 </div>
 
 <style>
+  .cli-versions {
+    display: flex;
+    gap: 6px;
+    align-items: center;
+  }
+
   .cli-version {
     display: flex;
     align-items: center;
@@ -57,6 +120,21 @@
     color: var(--accent-primary);
   }
 
+  .cli-version.supported.current {
+    border-color: var(--success-color, #4caf50);
+    color: var(--success-color, #4caf50);
+  }
+
+  .cli-version.supported.ahead {
+    border-color: var(--warning-color, #ff9800);
+    color: var(--warning-color, #ff9800);
+  }
+
+  .cli-version.supported.behind {
+    border-color: var(--error-color, #f44336);
+    color: var(--error-color, #f44336);
+  }
+
   .terminal-icon {
     flex-shrink: 0;
     opacity: 0.7;
@@ -65,4 +143,18 @@
   .version-text {
     white-space: nowrap;
   }
+
+  .version-warning {
+    font-size: 0.75rem;
+    font-style: italic;
+    white-space: nowrap;
+  }
+
+  .version-warning.ahead {
+    color: var(--warning-color, #ff9800);
+  }
+
+  .version-warning.behind {
+    color: var(--error-color, #f44336);
+  }
 </style>