fix(dictation): PR 1.4 review polish — banner re-prompt, nav flush, language restore

- Track draft-handled-this-session flag so Restore/Discard suppresses
  the recovery banner on page-nav round-trips within one session;
  resets cleanly on the next successful save.
- Flush pending autosave in onDestroy so Tauri SPA navigation
  preserves the last <1.5s of input.
- Round-trip language on Restore so a draft captured under one
  language doesn't silently inherit the current setting on revival.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/pages/DictationPage.svelte

@@ -1,10 +1,23 @@
+<script lang="ts" module>
+  // PR 1.4 review polish: module-scoped (NOT component-scoped) so the
+  // flag survives Tauri SPA navigation re-mounting this page. Once the
+  // user has explicitly Restored or Discarded the recovery banner this
+  // session, suppress re-prompting on subsequent in-app navigations
+  // (Dictation → History → Dictation). Without this, the autosave that
+  // immediately follows a Restore would re-trigger the banner on the
+  // next visit. Reset to false on the next successful save (or Clear)
+  // so a fresh capture-and-recovery cycle still works within the same
+  // session without needing a full app restart.
+  let draftHandledThisSession = false;
+</script>
+
 <script lang="ts">
   // @ts-nocheck
   import { onMount, onDestroy } from "svelte";
   import { Channel, invoke } from "@tauri-apps/api/core";
   import { emit } from "@tauri-apps/api/event";
   import { getCurrentWindow } from "@tauri-apps/api/window";
-  import { page, settings, templates, profiles, addToHistory, addTask, tasks } from "$lib/stores/page.svelte.js";
+  import { page, settings, saveSettings, templates, profiles, addToHistory, addTask, tasks } from "$lib/stores/page.svelte.js";
   import { markError, markGenerating, markGenerationDone, markLoading, refreshLlmStatus } from "$lib/stores/llmStatus.svelte.js";
   import { playStartCue, playStopCue, playCompleteCue } from "$lib/utils/sounds.js";
   import { profilesStore } from "$lib/stores/profiles.svelte.ts";
@@ -91,11 +104,15 @@
     // Recovery check — runs even in non-Tauri preview so the browser
     // shell can also offer to restore. Only shows the banner if there's
     // nothing currently in the textarea (otherwise the user has live
-    // content and a banner would be confusing).
-    const draft = loadRecoverableDraft();
-    if (draft && !transcript.trim()) {
-      recoverableDraft = draft;
-      recoverableDraftAgo = formatTimeAgo(draft.updatedAt);
+    // content and a banner would be confusing). Also skipped if the
+    // user already Restored/Discarded this session — see
+    // draftHandledThisSession above.
+    if (!draftHandledThisSession) {
+      const draft = loadRecoverableDraft();
+      if (draft && !transcript.trim()) {
+        recoverableDraft = draft;
+        recoverableDraftAgo = formatTimeAgo(draft.updatedAt);
+      }
     }
 
     // visibilitychange + pagehide flush the autosave immediately so
@@ -125,10 +142,11 @@
       visibilityHandler = null;
     }
     window.removeEventListener("pagehide", flushAutosave);
-    if (autosaveTimer) {
-      clearTimeout(autosaveTimer);
-      autosaveTimer = null;
-    }
+    // Tauri SPA navigation (Dictation → History → Files) doesn't fire
+    // pagehide or visibilitychange, so without this flush the last
+    // <1.5s of pre-nav input would be lost from the draft. flushAutosave
+    // also clears the timer, so no need to clear it again below.
+    flushAutosave();
     clearInterval(timerInterval);
     if (page.recording) {
       page.recording = false;
@@ -194,8 +212,16 @@
     segments = Array.isArray(recoverableDraft.segments)
       ? [...recoverableDraft.segments]
       : [];
+    // Round-trip the language so a draft captured under a different
+    // language (e.g. user was in Spanish, switched away, came back)
+    // doesn't silently inherit the current setting on revival.
+    if (recoverableDraft.language) {
+      settings.language = recoverableDraft.language;
+      saveSettings();
+    }
     recoverableDraft = null;
     recoverableDraftAgo = "";
+    draftHandledThisSession = true;
     // Don't clear the localStorage entry — the autosave $effect will
     // immediately rewrite it with a fresh `updatedAt` reflecting the
     // restored state. If the app crashes between restore and next
@@ -205,6 +231,7 @@
   function discardDraft() {
     recoverableDraft = null;
     recoverableDraftAgo = "";
+    draftHandledThisSession = true;
     clearDraft();
   }
 
@@ -734,6 +761,10 @@
         return;
       }
       clearDraft();
+      // Successful save closes the current draft cycle; clear the
+      // session flag so a fresh capture-and-recovery cycle works
+      // normally without needing a full app restart.
+      draftHandledThisSession = false;
 
       // Extract tasks from transcript
       const extracted = await extractTasksForTranscript(transcript);
@@ -799,6 +830,7 @@
     // throw away.
     recoverableDraft = null;
     recoverableDraftAgo = "";
+    draftHandledThisSession = false;
     clearDraft();
   }
 
@@ -876,6 +908,7 @@
       return;
     }
     clearDraft();
+    draftHandledThisSession = false;
     saved = true;
     setTimeout(() => { saved = false; }, FEEDBACK_TIMEOUT_MS);
   }