feat: add multi-rack elevation view and switch icons

- add rack elevation view for one or multiple racks
- render front and rear device positions by rack unit
- show physical cabling below selected racks
- add site, location, rack, and empty-rack filters
- add network, leaf, spine, and aggregation switch icons
- add “Weitere Ansichten” navigation category

netbox_topology_views/static/netbox_topology_views/css/app.css

@@ -1 +1 @@
-#visgraph{height:64vh;border:1px solid #ced4da}html[data-netbox-color-mode=dark] #visgraph{background-color:#212529;border:1px solid #495057}.image-dropdown img{width:64px;height:64px}.image-dropdown-content{display:flex;flex-wrap:wrap;gap:.5rem;padding-inline:.5rem;width:50vw;max-width:32rem}.image-dropdown-content>img{cursor:pointer}
+#visgraph{height:64vh;border:1px solid #ced4da}html[data-netbox-color-mode=dark] #visgraph{background-color:#212529;border:1px solid #495057}.image-dropdown img{width:64px;height:64px}.image-dropdown-content{display:flex;flex-wrap:wrap;gap:.5rem;padding-inline:.5rem;width:50vw;max-width:32rem}.image-dropdown-content>img{cursor:pointer}.rack-elevation-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(34rem,1fr));gap:1rem}.rack-card{border:1px solid var(--tblr-border-color,#ced4da);border-radius:.4rem;background:var(--tblr-bg-surface,#fff);padding:1rem}.rack-card>header{display:flex;justify-content:space-between;margin-bottom:.75rem}.rack-faces{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.rack-face-title{text-align:center;font-size:.75rem;text-transform:uppercase;margin-bottom:.25rem}.rack-frame{display:flex;height:calc(var(--rack-units)*14px);min-height:280px;max-height:70vh;border:4px solid #3b4654;background:repeating-linear-gradient(to top,rgba(127,127,127,.14) 0,rgba(127,127,127,.14) 1px,transparent 1px,transparent calc(100%/var(--rack-units)))}.rack-unit-labels{width:2rem;display:flex;flex-direction:column;justify-content:space-around;font-size:.55rem;text-align:center;color:var(--tblr-secondary,#667382)}.rack-device-area{position:relative;flex:1;border-left:1px solid #3b4654}.rack-device{position:absolute;left:3px;right:3px;min-height:2px;overflow:hidden;padding:1px 5px;border:2px solid #1685fc;border-radius:3px;background:#162e45;color:#fff;line-height:1.1;text-decoration:none}.rack-device:hover{filter:brightness(1.25);color:#fff;z-index:2}.rack-device span,.rack-device small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.rack-device small{font-size:.6rem;opacity:.8}@media(max-width:700px){.rack-elevation-grid{grid-template-columns:1fr}.rack-faces{grid-template-columns:1fr}}

netbox_topology_views/static/netbox_topology_views/img/aggregation-switch.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128"><circle cx="64" cy="64" r="59" fill="#fff4e5" stroke="#e58a16" stroke-width="6"/><rect x="20" y="48" width="88" height="42" rx="7" fill="#513717"/><g fill="#ffc66f"><path d="M28 58h10v8H28zm14 0h10v8H42zm14 0h10v8H56zm14 0h10v8H70zm14 0h16v8H84zM28 71h10v8H28zm14 0h10v8H42zm14 0h10v8H56zm14 0h10v8H70zm14 0h16v8H84z"/></g><path d="M34 27h25m10 0h25M59 27l10 0M64 27v17" fill="none" stroke="#e58a16" stroke-width="7" stroke-linecap="round"/></svg>

netbox_topology_views/static/netbox_topology_views/img/leaf-switch.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128"><circle cx="64" cy="64" r="59" fill="#eafff4" stroke="#20a86b" stroke-width="6"/><rect x="20" y="49" width="88" height="39" rx="7" fill="#174637"/><g fill="#8cf0bf"><path d="M29 59h9v7h-9zm13 0h9v7h-9zm13 0h9v7h-9zm13 0h9v7h-9zm13 0h9v7h-9zm13 0h6v7h-6zM29 70h9v7h-9zm13 0h9v7h-9zm13 0h9v7h-9zm13 0h9v7h-9zm13 0h9v7h-9zm13 0h6v7h-6z"/></g><path d="M64 20c-14 8-22 17-22 27 14 1 23-5 26-19 7 9 12 15 20 18-1-12-9-21-24-26z" fill="#20a86b"/></svg>

netbox_topology_views/static/netbox_topology_views/img/network-switch.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128"><circle cx="64" cy="64" r="59" fill="#e8f4ff" stroke="#1685fc" stroke-width="6"/><rect x="22" y="42" width="84" height="45" rx="7" fill="#183a5a"/><path d="M28 52h72v25H28z" fill="#10283e"/><g fill="#52d273"><circle cx="34" cy="64" r="3"/><circle cx="43" cy="64" r="3"/></g><g fill="#8fc8ff"><path d="M55 55h10v7H55zm14 0h10v7H69zm14 0h10v7H83zM55 67h10v7H55zm14 0h10v7H69zm14 0h10v7H83z"/></g><path d="m35 33 9-8v6h40v-6l9 8-9 8v-6H44v6z" fill="#1685fc"/></svg>

netbox_topology_views/static/netbox_topology_views/img/spine-switch.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128"><circle cx="64" cy="64" r="59" fill="#f2ecff" stroke="#7654d6" stroke-width="6"/><rect x="20" y="48" width="88" height="42" rx="7" fill="#302657"/><g fill="#bca9ff"><path d="M28 58h9v8h-9zm13 0h9v8h-9zm13 0h9v8h-9zm13 0h9v8h-9zm13 0h9v8h-9zm13 0h7v8h-7zM28 71h9v8h-9zm13 0h9v8h-9zm13 0h9v8h-9zm13 0h9v8h-9zm13 0h9v8h-9zm13 0h7v8h-7z"/></g><path d="M64 45V20M64 25 44 39M64 25l20 14" fill="none" stroke="#7654d6" stroke-width="7" stroke-linecap="round"/></svg>