feat: GIF search (Klipy), stickers, emoji picker, and bug fixes

- Add GIF search powered by Klipy API with correct response mapping
  (file.sm/hd tiers, not flat files structure)
- Add sticker system: packs, upload with auto-downscale, send in messages
- Add tabbed InputPopover with emoji, GIF, and sticker pickers
- Fix GIF API key migration race condition (column-add loop vs rename)
- Fix masked API key corruption on settings save (server + client guards)
- Fix sticker packs 403 (reversed isMember parameter order)
- Fix emoji picker not filling popover width (perLine 8→9, CSS 100%)
- Add error logging for Klipy API failures

packages/web/src/styles/globals.css

@@ -292,6 +292,21 @@
   }
 }
 
+/* ── Emoji Mart Overrides ── */
+.emoji-picker-wrapper em-emoji-picker {
+  --em-rgb-background: 20, 20, 26;
+  --em-rgb-input: 17, 17, 24;
+  --em-rgb-color: 216, 216, 222;
+  --em-color-border: rgba(255, 255, 255, 0.07);
+  --em-color-border-over: rgba(255, 255, 255, 0.12);
+  --rgb-accent: 124, 108, 246;
+  --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
+  border: none !important;
+  background: transparent !important;
+  width: 100% !important;
+  max-height: 400px;
+}
+
 /* Animations */
 @keyframes fadeIn {
   from { opacity: 0; }