Release 2.2.1: new providers, faster connects, SQL write fix

.changeset/v2-2-1-providers-and-fixes.md

@@ -0,0 +1,29 @@
+### New Features
+- Connect TiDB Cloud, Turso, Nile and Upstash from the provider picker. TiDB shows its sign-in code right in the app
+- Alt+wheel scrolls the table a few rows at a time, for landing on a precise row in a huge table
+- Sign out of a provider from its card, with a confirm first
+- Saved connections show their provider's logo and a small chip naming the engine
+- Keyboard shortcuts in the connections dialog: new connection, paste a URL, filter and resume the last one
+- The MCP dialog copies a ready config for every client
+- A Claude font preset in Settings → Appearance
+
+### Bug Fixes
+- A SQL run that ends in a SELECT keeps its earlier writes instead of rolling them back
+- Picking a saved provider database connects to that database, never one with a similar name
+- Passwords with a raw %, #, ? or @ import from a connection URL whole
+- Stopping a query in the editor stops it on the server too
+- Deleted connections stay deleted, and deleting one asks first
+- Provider sign-in survives a restart on Windows
+- PlanetScale lists databases across organizations and creates passwords again
+- Upstash connections keep their provider after a restart
+- One organization the token can't read no longer empties the whole database list
+- The splash screen no longer flashes one colour and then another
+- A chart on a windowed table uses only the rows that are loaded
+
+### Changes
+- Provider databases open on the last list instead of a spinner, and reconnecting skips the API calls entirely
+- Connecting to far away databases is faster: no restarted handshakes, no double connect, one Redis connection reused
+- Geist is the default font again
+- The connect page uses the full width with four cards per row, and the New table dialog reads as one table
+- An empty sidebar tab shows one empty state instead of two
+- Failed database picks show as a toast and leave the picker open

DESIGN_SYSTEM.md

@@ -36,11 +36,14 @@ mismatched control heights, or one-off selected states.
 ### Fonts (`src/app.css`)
 | Role | Variable | Stack |
 |---|---|---|
-| UI / sans | `--font-sans` | Geist Variable → system-ui |
-| Data / mono | `--font-mono` | Geist Mono Variable → ui-monospace |
+| UI / sans | `--font-sans` | Geist Variable (default) → system-ui |
+| Headings | `--heading-font` (utility `font-heading`) | Source Serif 4 Variable (Claude preset), else follows `--font-sans` |
+| Data / mono | `--font-mono` | Geist Mono Variable (default) → ui-monospace |
 | Code editor | `--editor-font-family` | JetBrains Mono → Geist Mono |
 
 - **Sans** for all chrome, labels, prose, buttons.
+- **Heading** (`font-heading`) for dialog titles, via `Dialog.Title`. Nothing
+  smaller than a title uses it.
 - **Mono** (`font-mono`) for data: identifiers, values, counts, IDs, SQL,
   hostnames, table/column names, timings. Numbers in stat cards use
   `font-mono tabular-nums`.