feat(kon): scaffold hybrid modular workspace

- Cargo workspace with 6 domain crates: core, audio, transcription, ai-formatting, storage, cloud-providers
- Minimal Tauri shell (lib.rs + main.rs) with plugin registration
- Svelte 5 frontend copied from Ramble v0.2
- All crates compile as empty stubs
- App identifier: uk.co.corbel.kon

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

src/lib/components/HotkeyRecorder.svelte

@@ -0,0 +1,73 @@
+<script>
+  import { settings, saveSettings } from "$lib/stores/page.svelte.js";
+
+  let recording = $state(false);
+  let captured = $state(false);
+
+  const modifierKeys = new Set(["Control", "Shift", "Alt", "Meta"]);
+
+  function startRecording() {
+    recording = true;
+    captured = false;
+  }
+
+  function handleKeyDown(e) {
+    if (!recording) return;
+    e.preventDefault();
+    e.stopPropagation();
+
+    // Wait for a non-modifier key
+    if (modifierKeys.has(e.key)) return;
+
+    const parts = [];
+    if (e.ctrlKey) parts.push("Ctrl");
+    if (e.shiftKey) parts.push("Shift");
+    if (e.altKey) parts.push("Alt");
+    if (e.metaKey) parts.push("Super");
+
+    // Must have at least one modifier
+    if (parts.length === 0) {
+      recording = false;
+      return;
+    }
+
+    parts.push(e.key.length === 1 ? e.key.toUpperCase() : e.key);
+    settings.globalHotkey = parts.join("+");
+    saveSettings();
+    recording = false;
+    captured = true;
+    setTimeout(() => { captured = false; }, 1500);
+  }
+
+  function handleBlur() {
+    recording = false;
+  }
+
+  let chips = $derived(settings.globalHotkey.split("+"));
+</script>
+
+<button
+  class="inline-flex items-center gap-1.5 rounded-xl px-4 py-2.5
+    {recording
+      ? 'bg-bg-input border-accent shadow-[0_0_0_3px_rgba(232,168,124,0.1)]'
+      : captured
+        ? 'bg-bg-input border-border animate-pulse-warm'
+        : 'bg-bg-input border-border hover:border-border'}
+    border transition-all"
+  onclick={startRecording}
+  onkeydown={handleKeyDown}
+  onblur={handleBlur}
+  aria-label="Record hotkey"
+>
+  {#if recording}
+    <span class="text-[11px] text-text-tertiary italic">Press new shortcut...</span>
+  {:else}
+    {#each chips as chip, i}
+      {#if i > 0}
+        <span class="text-[10px] text-text-tertiary">+</span>
+      {/if}
+      <span class="px-2 py-0.5 rounded-md bg-bg-elevated border border-border text-[11px] font-medium text-text
+        shadow-[inset_0_1px_2px_rgba(0,0,0,0.3)]">{chip}</span>
+    {/each}
+  {/if}
+</button>