chore: clear tech-debt — *.css module decl removes the @ts-ignore; tick F-table

- public/css.d.ts: declare module '*.css' so tsc resolves CSS side-effect
  imports; removed the @ts-ignore in main.ts
- PROGRESS_LOG F1-F9 table ticked to match what's actually verified (F4/F7 still
  need a physical device)

public/main.ts

@@ -9,7 +9,7 @@
  * tab management + persistence in tabs.ts.
  */
 
-// @ts-ignore  CSS side-effect import processed by esbuild (→ public/build/main.css).
+// CSS side-effect import (esbuild → public/build/main.css; typed via css.d.ts).
 import '@xterm/xterm/css/xterm.css'
 import { mountKeybar } from './keybar.js'
 import { TabApp } from './tabs.js'