Add missing Svelte components and stores, fix .gitignore lib/ pattern

The src/lib/ directory was being excluded by a Python .gitignore rule
for lib/ (meant for Python's build output). Changed to /lib/ so it
only matches root-level lib/ and doesn't block src/lib/.

Adds 8 files that were created but missed in the initial commit:
- 5 Svelte components (Header, StatusBar, Controls, TranscriptionDisplay, Settings)
- 3 TypeScript stores (backend, config, transcriptions)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/components/Header.svelte

@@ -0,0 +1,82 @@
+<script lang="ts">
+  interface Props {
+    onSettingsClick: () => void;
+  }
+
+  let { onSettingsClick }: Props = $props();
+</script>
+
+<header class="app-header">
+  <h1 class="app-title">Local Transcription</h1>
+  <button class="settings-btn" onclick={onSettingsClick} title="Settings">
+    <svg
+      width="20"
+      height="20"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      stroke-width="2"
+      stroke-linecap="round"
+      stroke-linejoin="round"
+    >
+      <circle cx="12" cy="12" r="3"></circle>
+      <path
+        d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1
+        0 2.83 2 2 0 0 1-2.83 0l-.06-.06a1.65 1.65 0 0
+        0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-2
+        2 2 2 0 0 1-2-2v-.09A1.65 1.65 0 0 0 9 19.4a1.65
+        1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83 0 2 2
+        0 0 1 0-2.83l.06-.06A1.65 1.65 0 0 0 4.68
+        15a1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1-2-2 2 2 0
+        0 1 2-2h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0
+        0-.33-1.82l-.06-.06a2 2 0 0 1 0-2.83 2 2 0 0 1
+        2.83 0l.06.06A1.65 1.65 0 0 0 9 4.68a1.65 1.65 0
+        0 0 1-1.51V3a2 2 0 0 1 2-2 2 2 0 0 1 2
+        2v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0
+        1.82-.33l.06-.06a2 2 0 0 1 2.83 0 2 2 0 0 1 0
+        2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65
+        0 0 0 1.51 1H21a2 2 0 0 1 2 2 2 2 0 0
+        1-2 2h-.09a1.65 1.65 0 0 0-1.51 1z"
+      ></path>
+    </svg>
+  </button>
+</header>
+
+<style>
+  .app-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 12px 20px;
+    background-color: var(--bg-secondary);
+    border-bottom: 1px solid var(--border-color);
+    flex-shrink: 0;
+  }
+
+  .app-title {
+    font-size: 24px;
+    font-weight: 700;
+    color: var(--text-primary);
+    letter-spacing: -0.5px;
+  }
+
+  .settings-btn {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 36px;
+    height: 36px;
+    padding: 0;
+    border: 1px solid var(--border-color);
+    border-radius: 8px;
+    background-color: transparent;
+    color: var(--text-secondary);
+    cursor: pointer;
+    transition: color 0.15s ease, background-color 0.15s ease;
+  }
+
+  .settings-btn:hover {
+    color: var(--text-primary);
+    background-color: var(--bg-tertiary);
+  }
+</style>