fix(mobile): terminal and layout fixes for touch devices

Mobile-focused fixes for the web UI: keyboard-accessory layout and
overlap, native input visibility above the keyboard, CJK input handling,
terminal touch scrolling, tab-menu tap targets, mic-recording glow
containment, and mobile resize/keyboard-state handling on tab switch,
plus mobile visual-regression test coverage and snapshots.

Co-Authored-By: Saqeb Akhter <saqeb.akhter@gmail.com>

src/web/schemas.ts

@@ -161,6 +161,7 @@ export const RunPromptSchema = z.object({
 export const ResizeSchema = z.object({
   cols: z.number().int().min(1).max(500),
   rows: z.number().int().min(1).max(200),
+  viewportType: z.enum(['mobile', 'tablet', 'desktop']).optional(),
 });
 
 // ========== Case Routes ==========