feat(ui): Add meeting button + import modal wiring in the header

src/App.svelte

@@ -7,6 +7,7 @@
   import Settings from "./lib/views/Settings.svelte";
   import ConsentNotice from "./lib/components/ConsentNotice.svelte";
   import LevelMeter from "./lib/components/LevelMeter.svelte";
+  import ImportMeeting from "./lib/components/ImportMeeting.svelte";
   import { trapFocus } from "./lib/actions/trapFocus";
   import { recording } from "./lib/stores/recording.svelte";
   import { settings } from "./lib/stores/settings.svelte";
@@ -21,6 +22,7 @@
     Circle,
     Square,
     Trash2,
+    FilePlus,
     Settings as SettingsIcon,
     AlertTriangle,
     PanelLeftClose,
@@ -31,6 +33,13 @@
 
   let showSettings = $state(false);
   let showConsent = $state(false);
+  let showImport = $state(false);
+
+  // A freshly imported meeting: refresh the list and open it.
+  async function onImported(id: string) {
+    await meetings.load();
+    await meetings.select(id);
+  }
 
   // Vault unlock gate (T8.8): if the vault is enabled but locked at startup,
   // prompt for the password so encrypted meetings are readable.
@@ -237,6 +246,14 @@
           <option value={t.id}>{t.name}</option>
         {/each}
       </select>
+      <button
+        class="import-btn"
+        onclick={() => (showImport = true)}
+        title="Add a meeting from a file or URL"
+      >
+        <FilePlus size={13} aria-hidden="true" />
+        Add meeting
+      </button>
       <button
         class="record-btn"
         onclick={startRecording}
@@ -321,6 +338,10 @@
     <Settings onClose={() => (showSettings = false)} />
   {/if}
 
+  {#if showImport}
+    <ImportMeeting onClose={() => (showImport = false)} {onImported} />
+  {/if}
+
   {#if vaultLocked}
     <div
       class="vault-overlay"
@@ -578,7 +599,8 @@
     font-size: 0.85rem;
   }
   .record-btn,
-  .stop-btn {
+  .stop-btn,
+  .import-btn {
     display: inline-flex;
     align-items: center;
     gap: 0.4rem;
@@ -593,9 +615,18 @@
       transform 100ms ease-out;
   }
   .record-btn:active,
-  .stop-btn:active {
+  .stop-btn:active,
+  .import-btn:active {
     transform: scale(0.97);
   }
+  .import-btn {
+    background: var(--bg-elevated);
+    color: var(--fg);
+    border-color: var(--border);
+  }
+  .import-btn:hover {
+    background: var(--bg-hover);
+  }
   .record-btn {
     background: var(--danger);
     color: #ffffff;