feat(cli): use dim colors for YOLO/auto-accept mode borders

[afarber]

TLDR

Replace bright red/yellow border colors in YOLO and auto-accept modes with darker, less visually intense variants.

Dive Deeper

Added new semantic color tokens (errorDim, warningDim) and corresponding theme colors (AccentRedDim, AccentYellowDim) across all themes:

• Dark themes: #8B3A4A (dim rose) for YOLO, #8B7530 (dim gold) for auto-accept
• Light themes: #993333 (dim red) for YOLO, #8B7000 (dim amber) for auto-accept
• ANSI themes: fallback to standard red/yellow

Reviewer Test Plan

1. Run npm run start
2. Enable YOLO mode: /approval-mode yolo
3. Verify the input border is a darker red (not bright pink/red)
4. Enable auto-accept mode: /approval-mode auto-edit
5. Verify the input border is a darker gold (not bright yellow)
6. Test with different themes via /theme command

Alternative: Start directly with npm start -- --yolo or npm start -- -y

Testing Matrix

	🍏	🪟	🐧
npm run	yes	❓	❓
npx	❓	❓	❓
Docker	❓	❓	❓
Podman	❓	-	-
Seatbelt	❓	-	-

Linked issues / bugs

Fixes #1461

[afarber]

Successfully tested on my Macbook Air M1 with macOS 26.2 (note the subdued red border color at the bottom):

[tanzhenxin]

LGTM!