feat: add ability to configure the agent (also theme switcher) (#3)

### Explanation

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### Issue

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### Attestations

- [ ] 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.

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### Versioning

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Reviewed-on: #3
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/lib/components/StatusBar.svelte

@@ -4,6 +4,7 @@
   import { open } from "@tauri-apps/plugin-dialog";
   import { openUrl } from "@tauri-apps/plugin-opener";
   import { claudeStore } from "$lib/stores/claude";
+  import { configStore, type HikariConfig } from "$lib/stores/config";
   import type { ConnectionStatus } from "$lib/types/messages";
   import { onMount } from "svelte";
 
@@ -15,6 +16,14 @@
   let isConnecting = $state(false);
   let grantedToolsList: string[] = $state([]);
   let appVersion = $state("");
+  let currentConfig: HikariConfig = $state({
+    model: null,
+    api_key: null,
+    custom_instructions: null,
+    mcp_servers_json: null,
+    auto_granted_tools: [],
+    theme: "dark",
+  });
 
   onMount(async () => {
     appVersion = await getVersion();
@@ -33,6 +42,10 @@
     grantedToolsList = Array.from(tools);
   });
 
+  configStore.config.subscribe((config) => {
+    currentConfig = config;
+  });
+
   async function handleBrowse() {
     try {
       const selected = await open({
@@ -54,11 +67,21 @@
 
     const targetDir = selectedDirectory || "/home/naomi";
 
+    // Combine session-granted tools with config auto-granted tools
+    const allAllowedTools = [
+      ...new Set([...grantedToolsList, ...currentConfig.auto_granted_tools]),
+    ];
+
     try {
-      // Pass granted tools to Claude so they're pre-approved
       await invoke("start_claude", {
-        workingDir: targetDir,
-        allowedTools: grantedToolsList.length > 0 ? grantedToolsList : null,
+        options: {
+          working_dir: targetDir,
+          model: currentConfig.model || null,
+          api_key: currentConfig.api_key || null,
+          custom_instructions: currentConfig.custom_instructions || null,
+          mcp_servers_json: currentConfig.mcp_servers_json || null,
+          allowed_tools: allAllowedTools,
+        },
       });
     } catch (error) {
       console.error("Failed to start Claude:", error);
@@ -140,6 +163,26 @@
   </div>
 
   <div class="flex items-center gap-3">
+    <button
+      onclick={configStore.openSidebar}
+      class="p-1 text-gray-500 hover:text-[var(--accent-primary)] transition-colors"
+      title="Settings"
+    >
+      <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          stroke-width="2"
+          d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z"
+        />
+        <path
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          stroke-width="2"
+          d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"
+        />
+      </svg>
+    </button>
     <button
       onclick={() => openUrl(DISCORD_URL)}
       class="p-1 text-gray-500 hover:text-[var(--accent-primary)] transition-colors"