Rework the web UI: tile-based progress, view nav, responsive

Replace the single-page layout with a view-based one (Games / Settings /
Logs via the left nav) and fold all download UI into the game tile — the
separate download queue is gone.

Per tile while downloading: an in-tile progress bar with auto-scaled size
(B/KB/MB/GB/TB), live transfer speed and ETA from the poll deltas, and a
green "Downloading" marker. One fixed-width action button that no longer
reflows with its label: a blue Update/Download/Install that morphs into an
amber Cancel while the download runs, plus a ghost Delete for a finished
package.

Settings and Logs moved to their own pages. Mobile-first responsive layout
(rail collapses to a top bar, icon-only nav, single-column tiles, >=44px
touch targets, 16px inputs). Real free space (statvfs) is shown auto-scaled
in the rail and status strip.

New "Home-screen shortcut" toggle (default on, persisted as home_shortcut
in config.json). The actual PS5 tile install is not wired yet: it needs a
prebuilt deeplinkUri stub PKG installed via sceAppInstUtil.

Fixes from an adversarial review pass:
- Reconcile in-flight downloads from /api/downloads onto the cards, so
  progress + Cancel appear after a reload or a download started elsewhere,
  and stop the per-poll full-grid rebuild.
- Clear the downloaded flag on install and once the server reports the
  title up to date, so a patched title no longer shows Install/Delete
  forever.
- Zero a stale speed/ETA if the byte counter goes backwards.
- a11y: nav buttons keep an accessible name when the label is hidden on
  small screens; visible focus ring on the search box; filter group is
  role=group with aria-pressed; drop the noisy grid-level aria-live; fold
  the transient "checking" state into a visible filter bucket.

src/patchdl_websrv.c

@@ -38,7 +38,8 @@ static struct {
     int  install_after_download;
     int  delete_pkg_after_install;
     int  verify_downloads;         /* SHA-256 each manifest piece (default off) */
-} g_cfg = { "deny", 0, 1, 0 };
+    int  home_shortcut;            /* user wants a home-screen browser tile */
+} g_cfg = { "deny", 0, 1, 0, 1 };
 
 static struct {
     int       active;
@@ -438,11 +439,13 @@ build_config_json(void) {
              "{\"default_policy\":\"%s\","
              "\"install_after_download\":%s,"
              "\"delete_pkg_after_install\":%s,"
-             "\"verify_downloads\":%s,",
+             "\"verify_downloads\":%s,"
+             "\"home_shortcut\":%s,",
              g_cfg.default_policy[0] ? g_cfg.default_policy : "deny",
              g_cfg.install_after_download ? "true" : "false",
              g_cfg.delete_pkg_after_install ? "true" : "false",
-             g_cfg.verify_downloads ? "true" : "false");
+             g_cfg.verify_downloads ? "true" : "false",
+             g_cfg.home_shortcut ? "true" : "false");
     pthread_mutex_unlock(&g_mutex);
 
     char *out = malloc(strlen(head) + sizeof(config_tail_json));
@@ -467,11 +470,13 @@ save_config(void) {
             "{\n\"default_policy\":\"%s\",\n"
             "\"install_after_download\":%s,\n"
             "\"delete_pkg_after_install\":%s,\n"
-            "\"verify_downloads\":%s,\n\"titles\":{",
+            "\"verify_downloads\":%s,\n"
+            "\"home_shortcut\":%s,\n\"titles\":{",
             g_cfg.default_policy[0] ? g_cfg.default_policy : "deny",
             g_cfg.install_after_download ? "true" : "false",
             g_cfg.delete_pkg_after_install ? "true" : "false",
-            g_cfg.verify_downloads ? "true" : "false");
+            g_cfg.verify_downloads ? "true" : "false",
+            g_cfg.home_shortcut ? "true" : "false");
     for (size_t i = 0; i < g_title_count; i++)
         fprintf(f, "%s\"%s\":%s", i ? "," : "",
                 g_titles[i].title_id, g_titles[i].enabled ? "true" : "false");
@@ -507,6 +512,8 @@ load_config(void) {
         json_get_bool(buf, "delete_pkg_after_install", g_cfg.delete_pkg_after_install);
     g_cfg.verify_downloads =
         json_get_bool(buf, "verify_downloads", g_cfg.verify_downloads);
+    g_cfg.home_shortcut =
+        json_get_bool(buf, "home_shortcut", g_cfg.home_shortcut);
 
     /* per-title overrides live under "titles": { "<id>": true|false, ... } */
     const char *titles = strstr(buf, "\"titles\"");
@@ -1093,6 +1100,8 @@ handle_config_post(struct MHD_Connection *conn, const char *body) {
         json_get_bool(body, "delete_pkg_after_install", g_cfg.delete_pkg_after_install);
     g_cfg.verify_downloads =
         json_get_bool(body, "verify_downloads", g_cfg.verify_downloads);
+    g_cfg.home_shortcut =
+        json_get_bool(body, "home_shortcut", g_cfg.home_shortcut);
     pthread_mutex_unlock(&g_mutex);
 
     save_config();