agent: lumotia-rebrand — frontend strings (svelte + i18n + design-system)

Phase 8 of the rebrand cascade. Every rendered string is now Lumotia;
no Magnotia surface visible in the UI.

Sweep replaced \bmagnotia\b -> lumotia and \bMagnotia\b -> Lumotia
across all .svelte / .ts / .js / .css / .html / .json (excluding
package-lock.json which regenerates, target/, build/, node_modules/).

Surfaces touched:
- src/app.css — design-token comment header and .magnotia-rh-* CSS
  resize-handle class selectors (also the consuming elements in
  components/ResizeHandles.svelte and src/routes/*/+layout.svelte).
- src/lib/i18n/locales/{en,de,es}.json — brand name in translations.
- src/lib/i18n/index.ts — header comment.
- src/lib/Sidebar.svelte and most pages under src/lib/pages/ +
  src/lib/components/ — title bars, document titles, default
  filenames (lumotia-YYYY-MM-DD.* etc), toast strings, error
  messages, dialog headers.
- src/routes/+layout.svelte, +page.svelte, viewer/, float/, preview/.
- src/app.html page <title>.
- src/lib/utils/settingsMigrations.ts — fallback toast copy.
- src/design-system/{colors_and_type.css,SKILL.md,README.md,
  ui_kits/{Sidebar.jsx,index.html}} — design-tokens, doc strings,
  preview wordmark in the kit.
- package.json — name + description.

NOT touched (deferred / immutable):
- package-lock.json — regenerates on next npm install.
- The two migration-call sites in stores reference the legacy magnotia
  keys deliberately; restored after the sweep clobbered them.
- docs/, README.md, HANDOVER.md — Phase 9 scope.

npm run check: 0 errors / 0 warnings (3958 files).
cargo test --workspace: 339 pass / 0 fail.

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

src/lib/pages/DictationPage.svelte

@@ -25,7 +25,7 @@
   import { hasTauriRuntime } from '$lib/utils/runtime.js';
   const prefs = getPreferences();
   const tauriRuntimeAvailable = hasTauriRuntime();
-  const browserPreviewMessage = "You're viewing Magnotia in a normal browser. Local transcription only works in the Tauri desktop app window.";
+  const browserPreviewMessage = "You're viewing Lumotia in a normal browser. Local transcription only works in the Tauri desktop app window.";
 
   let transcript = $state("");
   let segments = $state([]);
@@ -199,7 +199,7 @@
     lastLiveActivityAt = Date.now();
 
     if (status.type === "overload" || status.type === "warning") {
-      liveWarning = status.message || "Magnotia is dropping older audio to stay responsive.";
+      liveWarning = status.message || "Lumotia is dropping older audio to stay responsive.";
       return;
     }
 
@@ -643,7 +643,7 @@
     const content = exportTranscript(transcript, segments, format);
     const extMap = { txt: "txt", vtt: "vtt", srt: "srt", md: "md", csv: "csv", html: "html" };
     const ext = extMap[format] || "txt";
-    const defaultPath = `magnotia-${new Date().toISOString().slice(0, 10)}.${ext}`;
+    const defaultPath = `lumotia-${new Date().toISOString().slice(0, 10)}.${ext}`;
 
     if (hasTauriRuntime()) {
       try {