docs(site): bound diagram sizes for desktop reading

Signed-off-by: XiaoSeS <87064762+XiaoSeS@users.noreply.github.com>

docs/skillhub/public/diagrams/namespace-membership-flow-en.svg

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-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 579" role="img" aria-labelledby="title desc">
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 <title id="title">Namespace Collaboration</title>
 <desc id="desc">Authorized creator creates a team namespace. Owner or Admin adds or invites a member. An admitted user confirms acceptance. Publication and review remain separate.</desc>
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docs/skillhub/public/diagrams/namespace-membership-flow.svg

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+<svg width="360" height="579" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 579" role="img" aria-labelledby="title desc">
 <title id="title">命名空间协作流程</title>
 <desc id="desc">具备创建权限的平台操作者创建团队命名空间，所有者或空间管理员添加或邀请成员；受邀账号完成准入并确认加入后，再执行独立的发布与审核流程。</desc>
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docs/skillhub/public/diagrams/notification-delivery-flow-en.svg

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+<svg width="360" height="530" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 530" role="img" aria-labelledby="title desc">
 <title id="title">In-app notification flow</title><desc id="desc">Events select eligible recipients and consult category preferences before records are created. Reading a notification does not complete the target business action.</desc>
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docs/skillhub/public/diagrams/notification-delivery-flow.svg

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+<svg width="360" height="530" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 530" role="img" aria-labelledby="title desc">
 <title id="title">站内通知处理流程</title><desc id="desc">业务事件根据接收条件与分类偏好创建站内通知。阅读通知不代表关联业务已处理。</desc>
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docs/skillhub/public/diagrams/review-decision-flow-en.svg

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+<svg width="360" height="579" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 579" role="img" aria-labelledby="title desc">
 <title id="title">Review Decision</title>
 <desc id="desc">Identify the current request, verify evidence and readiness, decide only with permission, then re-read the result. Missing evidence leads to diagnosis, not approval.</desc>
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docs/skillhub/public/diagrams/review-decision-flow.svg

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-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 579" role="img" aria-labelledby="title desc">
+<svg width="360" height="579" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 579" role="img" aria-labelledby="title desc">
 <title id="title">审核决定流程</title>
 <desc id="desc">核对当前申请及处理权限，检查内容和证据；证据不足时排障或等待，不直接批准。提交决定后重新读取任务和目标对象的结果。</desc>
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docs/skillhub/public/diagrams/scan-result-flow-en.svg

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-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 530" role="img" aria-labelledby="title desc">
+<svg width="360" height="530" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 530" role="img" aria-labelledby="title desc">
 <title id="title">Scan evidence and review</title><desc id="desc">A scan request executes asynchronously. A report distinguishes findings from execution failures. A reviewer separately decides publication.</desc>
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docs/skillhub/public/diagrams/scan-result-flow.svg

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-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 530" role="img" aria-labelledby="title desc">
+<svg width="360" height="530" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 360 530" role="img" aria-labelledby="title desc">
 <title id="title">扫描证据与人工审核</title><desc id="desc">扫描任务异步执行。报告分别呈现执行失败与风险发现；审核员独立作出发布决策。</desc>
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