feat: restructure as pnpm monorepo with Tauri desktop shell

- Migrate to packages/web + packages/desktop workspace layout via git mv
- Add Tauri v2 desktop shell with @tauri-apps/plugin-http for CORS bypass
- Configure Turborepo with package-level dependsOn build graph
- Add semantic-release with exec plugin for GHA output and disabled PR comments
- Fix http:default capability scope to allow all HTTP/HTTPS origins
- Add Vite Tauri integration (clearScreen, TAURI_DEV_HOST, target, envPrefix)
- Add semantic-release.yml and release.yml GitHub Actions workflows
- Fix all Biome lint errors (noArrayIndexKey, noNonNullAssertion, button types)

packages/web/src/lib/constants.ts

@@ -0,0 +1,43 @@
+// Semantic color tokens for inline styles.
+// CSS variables (var(--text-1) etc.) handle theme-aware colors.
+// These constants are for fixed semantic states that don't invert with theme.
+
+export const COLOR = {
+	// Status
+	success: "#34d399",
+	successDim: "rgba(52,211,153,0.08)",
+	successBorder: "rgba(52,211,153,0.2)",
+
+	warning: "#f59e0b",
+	warningDim: "rgba(245,158,11,0.08)",
+	warningBorder: "rgba(245,158,11,0.2)",
+
+	destructive: "#f87171",
+	destructiveDim: "rgba(239,68,68,0.08)",
+	destructiveBorder: "rgba(239,68,68,0.2)",
+
+	// Accent (indigo — matches --accent CSS var)
+	accent: "#6366f1",
+	accentText: "#818cf8",
+	accentSoft: "#c7d2fe",
+	accentDim: "rgba(99,102,241,0.08)",
+	accentDimHover: "rgba(99,102,241,0.06)",
+	accentSubtle: "rgba(99,102,241,0.1)",
+	accentMuted: "rgba(99,102,241,0.6)",
+	accentGlow: "rgba(99,102,241,0.4)",
+	accentBorder: "rgba(99,102,241,0.2)",
+	accentBorderStrong: "rgba(99,102,241,0.15)",
+	accentSpinnerTrack: "rgba(99,102,241,0.15)",
+
+	// Neutral dim (slate-300 at opacity)
+	dimText: "rgba(148,163,184,0.5)",
+	dimIcon: "rgba(148,163,184,0.3)",
+
+	// Error detail text
+	destructiveMuted: "rgba(248,113,113,0.6)",
+	destructiveBorderStrong: "rgba(239,68,68,0.25)",
+
+	// Framer-motion hover card base state (inline only — CSS vars can't be animated)
+	cardBaseBg: "rgba(255,255,255,0.02)",
+	cardBaseBorder: "rgba(255,255,255,0.06)",
+} as const;