fix: homepage hero rendering + modal mask api migration

[Noveris-AI]

抱歉，这个 PR 是对上周同一修复的重新提交。

By: Passion

Summary

• fix homepage Hero title clipping and alignment by switching container to min-h-full and top-aligned layout
• redesign the main homepage heading into a smaller gradient art-style title with improved spacing/line height for better cross-viewport rendering
• replace deprecated Ant Design maskClosable usage with mask={{ closable: ... }} across Modal components to remove console warnings

Changes

Homepage typography/layout updates in:

• frontend/app/[locale]/page.tsx
• frontend/styles/globals.css

Modal API migration in:

• frontend/components/auth/loginModal.tsx
• frontend/components/auth/AuthDialogs.tsx
• frontend/app/[locale]/tenant-resources/components/resources/AgentList.tsx
• frontend/app/[locale]/tenant-resources/components/resources/InvitationList.tsx
• frontend/app/[locale]/agents/components/agentConfig/McpConfigModal.tsx
• frontend/app/[locale]/agents/components/agentConfig/tool/ToolConfigModal.tsx

Validation

• pnpm type-check (frontend) passes
• manual verification on /zh homepage for Hero title visibility and overall visual balance
• no remaining maskClosable references in frontend source

Notes

• This PR includes a follow-up Hero title rendering adjustment for the text Nexent 智能体 / 一个提示词，无限种可能 to avoid display inconsistencies on different viewport widths.

[WMC001]

新开发请合入develop分支，我们会定期统一合入main分支