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/Controls.svelte

@@ -0,0 +1,116 @@
+<script lang="ts">
+  import { backendStore } from "$lib/stores/backend";
+  import { transcriptionStore } from "$lib/stores/transcriptions";
+
+  let isTranscribing = $derived(backendStore.appState === "transcribing");
+  let isReady = $derived(
+    backendStore.appState === "ready" || backendStore.appState === "transcribing"
+  );
+  let isLoading = $state(false);
+
+  async function toggleTranscription() {
+    if (isLoading) return;
+    isLoading = true;
+    try {
+      if (isTranscribing) {
+        await backendStore.apiPost("/api/stop");
+      } else {
+        await backendStore.apiPost("/api/start");
+      }
+    } catch (err) {
+      console.error("Failed to toggle transcription:", err);
+    } finally {
+      isLoading = false;
+    }
+  }
+
+  async function clearTranscriptions() {
+    try {
+      await backendStore.apiPost("/api/clear");
+      transcriptionStore.clearAll();
+    } catch (err) {
+      console.error("Failed to clear:", err);
+    }
+  }
+
+  async function saveTranscriptions() {
+    try {
+      // Get transcription text from backend or local store
+      let text: string;
+      try {
+        const data = await backendStore.apiGet<{ text: string }>("/api/transcriptions");
+        text = data.text || transcriptionStore.getPlainText();
+      } catch {
+        text = transcriptionStore.getPlainText();
+      }
+
+      if (!text.trim()) {
+        console.warn("No transcriptions to save");
+        return;
+      }
+
+      // Try Tauri dialog for native save, fall back to browser download
+      try {
+        const { save } = await import("@tauri-apps/plugin-dialog");
+        const filePath = await save({
+          defaultPath: "transcription.txt",
+          filters: [
+            { name: "Text Files", extensions: ["txt"] },
+            { name: "All Files", extensions: ["*"] },
+          ],
+        });
+        if (filePath) {
+          // Write via backend API
+          await backendStore.apiPost("/api/save-file", { path: filePath, text });
+        }
+      } catch {
+        // Fallback: browser-style download
+        const blob = new Blob([text], { type: "text/plain" });
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement("a");
+        a.href = url;
+        a.download = "transcription.txt";
+        a.click();
+        URL.revokeObjectURL(url);
+      }
+    } catch (err) {
+      console.error("Failed to save:", err);
+    }
+  }
+</script>
+
+<div class="controls">
+  <button
+    class={isTranscribing ? "danger" : "primary"}
+    onclick={toggleTranscription}
+    disabled={!isReady || isLoading}
+  >
+    {#if isLoading}
+      ...
+    {:else if isTranscribing}
+      Stop Transcription
+    {:else}
+      Start Transcription
+    {/if}
+  </button>
+
+  <button onclick={clearTranscriptions} disabled={!backendStore.connected}>
+    Clear
+  </button>
+
+  <button onclick={saveTranscriptions} disabled={!backendStore.connected}>
+    Save
+  </button>
+</div>
+
+<style>
+  .controls {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 10px 20px;
+    background-color: var(--bg-secondary);
+    border-top: 1px solid var(--border-color);
+    flex-shrink: 0;
+  }
+</style>