feat(MCN工作台): 数据功能页+图标扁平化+多项UI优化

- 工作台大版本升级：hash 路由 + 6 数据功能页（周榜/热门账号/账号详情/视频详情/AI写脚本/AI写作复盘），只读复用 dsh 库副本 + 抖音榜单 JSON
- 数据库隔离：复制 dsh 库到 mcn-work-shop/，与 dsh 原库各访问各的（已 gitignore）
- 图标全面扁平化：Lucide 线性 SVG，功能图标亮色区分，文字标题去图标
- 首页重构：功能入口卡 + AI写剧本快捷卡片(2列/8个/5行预览) + 独立帮助页 + header 精简
- 新增设计技能 impeccable + taste-skill（生成网页时参考）
- 修复：fmtTime 跨 script 全局冲突(P0)、弹窗关闭、外链新标签打开等

.workbuddy/skills/impeccable/reference/distill.md

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+Strip a design to its essence. Remove anything that doesn't earn its place: redundant elements, repeated information, decorative noise, cosmetic complexity.
+
+
+---
+
+## Assess Current State
+
+Analyze what makes the design feel complex or cluttered:
+
+1. **Identify complexity sources**:
+   - **Too many elements**: Competing buttons, redundant information, visual clutter
+   - **Excessive variation**: Too many colors, fonts, sizes, styles without purpose
+   - **Information overload**: Everything visible at once, no progressive disclosure
+   - **Visual noise**: Unnecessary borders, shadows, backgrounds, decorations
+   - **Confusing hierarchy**: Unclear what matters most
+   - **Feature creep**: Too many options, actions, or paths forward
+
+2. **Find the essence**:
+   - What's the primary user goal? (There should be ONE)
+   - What's actually necessary vs nice-to-have?
+   - What can be removed, hidden, or combined?
+   - What's the 20% that delivers 80% of value?
+
+If any of these are unclear from the codebase, {{ask_instruction}}
+
+**CRITICAL**: Simplicity is not about removing features. It's about removing obstacles between users and their goals. Every element should justify its existence.
+
+## Plan Simplification
+
+Create a ruthless editing strategy:
+
+- **Core purpose**: What's the ONE thing this should accomplish?
+- **Essential elements**: What's truly necessary to achieve that purpose?
+- **Progressive disclosure**: What can be hidden until needed?
+- **Consolidation opportunities**: What can be combined or integrated?
+
+**IMPORTANT**: Simplification is hard. It requires saying no to good ideas to make room for great execution. Be ruthless.
+
+## Simplify the Design
+
+Systematically remove complexity across these dimensions:
+
+### Information Architecture
+- **Reduce scope**: Remove secondary actions, optional features, redundant information
+- **Progressive disclosure**: Hide complexity behind clear entry points (accordions, modals, step-through flows)
+- **Combine related actions**: Merge similar buttons, consolidate forms, group related content
+- **Clear hierarchy**: ONE primary action, few secondary actions, everything else tertiary or hidden
+- **Remove redundancy**: If it's said elsewhere, don't repeat it here
+
+### Visual Simplification
+- **Reduce color palette**: Use 1-2 colors plus neutrals, not 5-7 colors
+- **Limit typography**: One font family, 3-4 sizes maximum, 2-3 weights
+- **Remove decorations**: Eliminate borders, shadows, backgrounds that don't serve hierarchy or function
+- **Flatten structure**: Reduce nesting, remove unnecessary containers; never nest cards inside cards
+- **Remove unnecessary cards**: Cards aren't needed for basic layout; use spacing and alignment instead
+- **Consistent spacing**: Use one spacing scale, remove arbitrary gaps
+
+### Layout Simplification
+- **Linear flow**: Replace complex grids with simple vertical flow where possible
+- **Remove sidebars**: Move secondary content inline or hide it
+- **Full-width**: Use available space generously instead of complex multi-column layouts
+- **Consistent alignment**: Pick left or center, stick with it
+- **Generous white space**: Let content breathe, don't pack everything tight
+
+### Interaction Simplification
+- **Reduce choices**: Fewer buttons, fewer options, clearer path forward (paradox of choice is real)
+- **Smart defaults**: Make common choices automatic, only ask when necessary
+- **Inline actions**: Replace modal flows with inline editing where possible
+- **Remove steps**: Can the flow lose a step?
+- **Clear next action**: ONE obvious next action, not five competing ones
+
+### Content Simplification
+- **Shorter copy**: Cut every sentence in half, then do it again
+- **Active voice**: "Save changes" not "Changes will be saved"
+- **Remove jargon**: Plain language always wins
+- **Scannable structure**: Short paragraphs, bullet points, clear headings
+- **Essential information only**: Remove marketing fluff, legalese, hedging
+- **Remove redundant copy**: No headers restating intros, no repeated explanations, say it once
+
+### Code Simplification
+- **Remove unused code**: Dead CSS, unused components, orphaned files
+- **Flatten component trees**: Reduce nesting depth
+- **Consolidate styles**: Merge similar styles, use utilities consistently
+- **Reduce variants**: Does that component need 12 variations, or can 3 cover 90% of cases?
+
+**NEVER**:
+- Remove necessary functionality (simplicity ≠ feature-less)
+- Sacrifice accessibility for simplicity (clear labels and ARIA still required)
+- Make things so simple they're unclear (mystery ≠ minimalism)
+- Remove information users need to make decisions
+- Eliminate hierarchy completely (some things should stand out)
+- Oversimplify complex domains (match complexity to actual task complexity)
+
+## Verify Simplification
+
+Ensure simplification improves usability:
+
+- **Faster task completion**: Can users accomplish goals more quickly?
+- **Reduced cognitive load**: Is it easier to understand what to do?
+- **Still complete**: Are all necessary features still accessible?
+- **Clearer hierarchy**: Is it obvious what matters most?
+- **Better performance**: Does simpler design load faster?
+
+## Document Removed Complexity
+
+If you removed features or options:
+- Document why they were removed
+- Consider if they need alternative access points
+- Note any user feedback to monitor
+
+When the cuts feel right, hand off to `{{command_prefix}}impeccable polish` for the final pass. As Antoine de Saint-Exupéry put it: "Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away."