design: change to minimalistic and clean light theme

- Replace Matrix/terminal dark theme with modern light design
- Update Tailwind config with clean, professional color palette
- Change from monospace to Inter sans-serif font
- Update chart styling to use white background with subtle grids
- Remove glow effects and neon colors from buttons and UI
- Update color picker with better color options
- Improve sidebar spacing and typography
- Update annotation badges with softer colors
- Change scrollbar styling to match light theme

drizzle/0000_sweet_roland_deschain.sql

@@ -0,0 +1,18 @@
+CREATE TABLE `annotations` (
+	`id` integer PRIMARY KEY AUTOINCREMENT NOT NULL,
+	`timestamp` integer NOT NULL,
+	`label_type` text NOT NULL,
+	`geometry` text,
+	`created_at` integer NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE `candles` (
+	`id` integer PRIMARY KEY AUTOINCREMENT NOT NULL,
+	`time` integer NOT NULL,
+	`open` real NOT NULL,
+	`high` real NOT NULL,
+	`low` real NOT NULL,
+	`close` real NOT NULL
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `candles_time_unique` ON `candles` (`time`);