Polish: draft autosave, history refresh, outdated footer, more

Bug fixes / UX

- Footer: the privacy line still claimed 'generation runs in your
  browser'. Now correctly says the generation runs on the server and
  the key never reaches the browser.

- History panel: when the panel was open while a new generation
  completed, the new entry didn't appear until the user closed and
  re-opened the panel. The history module now dispatches a custom
  'melodymuse-history-updated' event on every write; the panel
  listens and re-reads. removeFromHistory/clearHistory emit too.
  writeAll is also now try/catch'd against quota errors.

- Auto-save the input form: the input is persisted to localStorage
  ('melodymuse-draft', debounced 400ms) so a refresh doesn't wipe
  what the user was typing. The initial state hydrates from the
  draft on mount.

- Cmd/Ctrl+Enter now works in the Music style field as well as
  the idea field — shared onKeyDown handler, propagated through the
  StyleField sub-component.

- Full regen ('Generate' / 'Regenerate All') now clears the previous
  assets before kicking off the new request, so the skeleton state
  shows during the round-trip instead of stale cards with a spinner
  on top. Per-section regen still leaves the other cards intact.

- Settings → Local data: the in-progress draft is now listed
  alongside history and theme, and has its own 'Clear in-progress
  draft' button. The 'Clear all local data' button clears it too.

src/components/Footer.tsx

@@ -7,8 +7,8 @@ export function Footer() {
           Generate Suno song assets with AI
         </p>
         <p>
-          All generation runs in your browser — your API key never leaves this
-          device.
+          Generation runs on the MelodyMuse server — your API key never reaches
+          the browser.
         </p>
       </div>
     </footer>

src/components/HistoryPanel.tsx

@@ -1,13 +1,14 @@
-import { useEffect, useState } from 'react';
-import { Clock, History, Trash2, X } from 'lucide-react';
+import { useEffect, useState } from "react";
+import { Clock, History, Trash2, X } from "lucide-react";
 import {
   clearHistory,
   formatRelative,
+  HISTORY_UPDATED_EVENT,
   loadHistory,
   removeFromHistory,
   type HistoryEntry,
-} from '../lib/history';
-import type { InputValues } from '../lib/types';
+} from "../lib/history";
+import type { InputValues } from "../lib/types";
 
 interface HistoryPanelProps {
   onLoad: (entry: HistoryEntry) => void;
@@ -17,13 +18,23 @@ export function HistoryPanel({ onLoad }: HistoryPanelProps) {
   const [open, setOpen] = useState(false);
   const [entries, setEntries] = useState<HistoryEntry[]>([]);
 
-  // Refresh the list whenever the panel is opened, so newly-saved generations
-  // appear without needing a full page refresh.
+  // Refresh the list whenever the panel is opened.
   useEffect(() => {
     if (!open) return;
     setEntries(loadHistory());
   }, [open]);
 
+  // And whenever the history is updated from elsewhere in the app (after a
+  // successful generation, or a delete/clear from a different panel).
+  useEffect(() => {
+    const handler = () => {
+      if (!open) return;
+      setEntries(loadHistory());
+    };
+    window.addEventListener(HISTORY_UPDATED_EVENT, handler);
+    return () => window.removeEventListener(HISTORY_UPDATED_EVENT, handler);
+  }, [open]);
+
   if (entries.length === 0 && !open) {
     return null;
   }
@@ -43,7 +54,7 @@ export function HistoryPanel({ onLoad }: HistoryPanelProps) {
             <span className="text-xs text-fg-muted">({entries.length})</span>
           )}
         </span>
-        <span className="text-xs text-fg-muted">{open ? 'Hide' : 'Show'}</span>
+        <span className="text-xs text-fg-muted">{open ? "Hide" : "Show"}</span>
       </button>
 
       {open && (
@@ -130,6 +141,6 @@ function HistoryRow({
 function summarizeInput(v: InputValues): string {
   const idea = v.idea.trim();
   const max = 90;
-  if (idea.length <= max) return idea || '(no idea text)';
-  return idea.slice(0, max - 1) + '…';
+  if (idea.length <= max) return idea || "(no idea text)";
+  return idea.slice(0, max - 1) + "…";
 }

src/components/InputPanel.tsx

@@ -228,6 +228,7 @@ export function InputPanel({
               loading={styleLoading}
               onChange={(v) => set("style_hint", v)}
               onRandom={handleStyleRandom}
+              onCmdEnter={onKeyDown}
             />
 
             <div>
@@ -324,7 +325,15 @@ interface StyleFieldProps {
   onRandom: (mode: "normal" | "crazy") => void;
 }
 
-function StyleField({ value, loading, onChange, onRandom }: StyleFieldProps) {
+function StyleField({
+  value,
+  loading,
+  onChange,
+  onRandom,
+  onCmdEnter,
+}: StyleFieldProps & {
+  onCmdEnter: (e: KeyboardEvent<HTMLTextAreaElement>) => void;
+}) {
   return (
     <div>
       <label
@@ -340,6 +349,7 @@ function StyleField({ value, loading, onChange, onRandom }: StyleFieldProps) {
         placeholder="e.g. dark synthwave, analog pads, 110 BPM"
         value={value}
         onChange={(e) => onChange(e.target.value)}
+        onKeyDown={onCmdEnter}
         className="textarea text-sm"
       />
       <div className="mt-2 grid grid-cols-2 gap-2">

src/lib/history.ts

@@ -1,12 +1,23 @@
 // Recent-generations history. Persists the last N successful generations in
 // localStorage so the user can revisit a song without re-running the model.
 
-import type { InputValues } from '../components/InputPanel';
-import type { SongAssets } from './types';
+import type { InputValues } from "../components/InputPanel";
+import type { SongAssets } from "./types";
 
-const HISTORY_KEY = 'melodymuse-history';
+const HISTORY_KEY = "melodymuse-history";
 const MAX_HISTORY = 6;
 
+// Fired on `window` whenever the history changes (add/remove/clear). The
+// HistoryPanel listens for this so it can refresh its visible list without
+// the user having to close and reopen it.
+export const HISTORY_UPDATED_EVENT = "melodymuse-history-updated";
+
+export function notifyHistoryUpdated(): void {
+  if (typeof window !== "undefined") {
+    window.dispatchEvent(new CustomEvent(HISTORY_UPDATED_EVENT));
+  }
+}
+
 export interface HistoryEntry {
   id: string;
   timestamp: number;
@@ -15,7 +26,7 @@ export interface HistoryEntry {
 }
 
 function readAll(): HistoryEntry[] {
-  if (typeof window === 'undefined') return [];
+  if (typeof window === "undefined") return [];
   try {
     const raw = window.localStorage.getItem(HISTORY_KEY);
     if (!raw) return [];
@@ -24,11 +35,11 @@ function readAll(): HistoryEntry[] {
     return parsed.filter(
       (e): e is HistoryEntry =>
         e &&
-        typeof e === 'object' &&
-        typeof e.id === 'string' &&
-        typeof e.timestamp === 'number' &&
-        typeof e.input === 'object' &&
-        typeof e.assets === 'object',
+        typeof e === "object" &&
+        typeof e.id === "string" &&
+        typeof e.timestamp === "number" &&
+        typeof e.input === "object" &&
+        typeof e.assets === "object",
     );
   } catch {
     return [];
@@ -36,7 +47,12 @@ function readAll(): HistoryEntry[] {
 }
 
 function writeAll(entries: HistoryEntry[]): void {
-  window.localStorage.setItem(HISTORY_KEY, JSON.stringify(entries));
+  try {
+    window.localStorage.setItem(HISTORY_KEY, JSON.stringify(entries));
+  } catch {
+    // localStorage quota or disabled — fail silently; history is a nice-to-have.
+  }
+  notifyHistoryUpdated();
 }
 
 export function loadHistory(): HistoryEntry[] {
@@ -68,10 +84,13 @@ export function clearHistory(): void {
   writeAll([]);
 }
 
-export function formatRelative(timestamp: number, now: number = Date.now()): string {
+export function formatRelative(
+  timestamp: number,
+  now: number = Date.now(),
+): string {
   const diff = Math.max(0, now - timestamp);
   const s = Math.floor(diff / 1000);
-  if (s < 60) return 'just now';
+  if (s < 60) return "just now";
   const m = Math.floor(s / 60);
   if (m < 60) return `${m}m ago`;
   const h = Math.floor(m / 60);

src/pages/HomePage.tsx

@@ -20,6 +20,11 @@ import {
   type VideoPrompt,
 } from "../lib/types";
 
+// localStorage key for the in-progress input form. Lets the user survive
+// an accidental refresh without losing what they were typing.
+const DRAFT_KEY = "melodymuse-draft";
+const DRAFT_DEBOUNCE_MS = 400;
+
 const DEFAULT_INPUT: InputValues = {
   idea: "",
   language: "English",
@@ -41,10 +46,27 @@ function isAnyBusy(loading: boolean, regenerating: RegeneratingMap): boolean {
   return false;
 }
 
+function loadDraft(): InputValues | null {
+  if (typeof window === "undefined") return null;
+  try {
+    const raw = window.localStorage.getItem(DRAFT_KEY);
+    if (!raw) return null;
+    const parsed = JSON.parse(raw) as Partial<InputValues> | null;
+    if (!parsed || typeof parsed !== "object") return null;
+    return { ...DEFAULT_INPUT, ...parsed };
+  } catch {
+    return null;
+  }
+}
+
 export function HomePage() {
   const toast = useToast();
 
-  const [input, setInput] = useState<InputValues>(DEFAULT_INPUT);
+  // Hydrate the input from any previously-saved draft so the user can recover
+  // an accidental refresh.
+  const [input, setInput] = useState<InputValues>(
+    () => loadDraft() ?? DEFAULT_INPUT,
+  );
   const [assets, setAssets] = useState<SongAssets | null>(null);
   // The "last generated" snapshot. The cards compare their current editable
   // values against these to decide whether to show the Revert button.
@@ -60,7 +82,20 @@ export function HomePage() {
 
   const anyRegenerating = isAnyBusy(loading, regenerating);
 
-  // Check the server on mount. If unreachable, surface a quiet banner.
+  // Debounced auto-save: persist the input form ~400ms after the last edit so
+  // a refresh doesn't wipe what the user was typing.
+  useEffect(() => {
+    const id = window.setTimeout(() => {
+      try {
+        window.localStorage.setItem(DRAFT_KEY, JSON.stringify(input));
+      } catch {
+        // Quota or disabled — fine, history is the more durable store.
+      }
+    }, DRAFT_DEBOUNCE_MS);
+    return () => window.clearTimeout(id);
+  }, [input]);
+
+  // Check the server on mount. If unreachable, surface a quiet header hint.
   useEffect(() => {
     const ctrl = new AbortController();
     (async () => {
@@ -161,6 +196,10 @@ export function HomePage() {
 
   const handleGenerate = useCallback(async () => {
     if (!input.idea.trim()) return;
+    // Clear the old assets so the skeleton state shows during generation
+    // instead of the previous song's cards.
+    setAssets(null);
+    setOriginalAssets(null);
     await runGeneration(
       () => buildRequest("all"),
       (result) => {
@@ -177,6 +216,8 @@ export function HomePage() {
 
   const handleRegenerateAll = useCallback(async () => {
     if (!input.idea.trim()) return;
+    setAssets(null);
+    setOriginalAssets(null);
     await runGeneration(
       () => buildRequest("all"),
       (result) => {

src/pages/SettingsPage.tsx

@@ -13,21 +13,21 @@ import { ThemeToggle } from "../components/ThemeToggle";
 import { useToast } from "../lib/toast";
 import { getServerStatus, type ServerStatus } from "../lib/llm";
 
-const STORAGE_KEY = "melodymuse-config";
 const HISTORY_KEY = "melodymuse-history";
+const DRAFT_KEY = "melodymuse-draft";
 const THEME_KEY = "melodymuse-theme";
 
 interface LocalDataSummary {
   historyEntries: number;
+  hasDraft: boolean;
   hasTheme: boolean;
 }
 
 function readLocalDataSummary(): LocalDataSummary {
   if (typeof window === "undefined") {
-    return { historyEntries: 0, hasTheme: false };
+    return { historyEntries: 0, hasDraft: false, hasTheme: false };
   }
   let historyEntries = 0;
-  let hasTheme = false;
   try {
     const raw = window.localStorage.getItem(HISTORY_KEY);
     if (raw) {
@@ -37,8 +37,9 @@ function readLocalDataSummary(): LocalDataSummary {
   } catch {
     /* ignore */
   }
-  hasTheme = window.localStorage.getItem(THEME_KEY) !== null;
-  return { historyEntries, hasTheme };
+  const hasDraft = window.localStorage.getItem(DRAFT_KEY) !== null;
+  const hasTheme = window.localStorage.getItem(THEME_KEY) !== null;
+  return { historyEntries, hasDraft, hasTheme };
 }
 
 export function SettingsPage() {
@@ -50,6 +51,7 @@ export function SettingsPage() {
   const [checking, setChecking] = useState(true);
   const [summary, setSummary] = useState<LocalDataSummary>({
     historyEntries: 0,
+    hasDraft: false,
     hasTheme: false,
   });
 
@@ -89,17 +91,24 @@ export function SettingsPage() {
     toast.info("Recent generations cleared");
   };
 
+  const onClearDraft = () => {
+    if (!summary.hasDraft) return;
+    window.localStorage.removeItem(DRAFT_KEY);
+    setSummary((s) => ({ ...s, hasDraft: false }));
+    toast.info("In-progress draft cleared");
+  };
+
   const onClearAll = () => {
     if (
       !window.confirm(
-        "Clear all MelodyMuse data from this browser? This will remove the recent generations and the theme preference. The API key on the server is NOT affected.",
+        "Clear all MelodyMuse data from this browser? This will remove the recent generations, the in-progress draft, and the theme preference. The API key on the server is NOT affected.",
       )
     )
       return;
-    window.localStorage.removeItem(STORAGE_KEY);
     window.localStorage.removeItem(HISTORY_KEY);
+    window.localStorage.removeItem(DRAFT_KEY);
     window.localStorage.removeItem(THEME_KEY);
-    setSummary({ historyEntries: 0, hasTheme: false });
+    setSummary({ historyEntries: 0, hasDraft: false, hasTheme: false });
     toast.info("Local data cleared");
   };
 
@@ -196,6 +205,10 @@ export function SettingsPage() {
                 {summary.historyEntries} recent generation
                 {summary.historyEntries === 1 ? "" : "s"}
               </li>
+              <li>
+                <code className="font-mono">melodymuse-draft</code> —{" "}
+                {summary.hasDraft ? "saved (in-progress input)" : "empty"}
+              </li>
               <li>
                 <code className="font-mono">melodymuse-theme</code> —{" "}
                 {summary.hasTheme ? "set" : "using default"}
@@ -211,6 +224,15 @@ export function SettingsPage() {
                 <Trash2 className="w-4 h-4" />
                 Clear recent generations
               </button>
+              <button
+                type="button"
+                onClick={onClearDraft}
+                disabled={!summary.hasDraft}
+                className="btn-secondary"
+              >
+                <Trash2 className="w-4 h-4" />
+                Clear in-progress draft
+              </button>
               <button
                 type="button"
                 onClick={onClearAll}