Document full architecture, design, API, features, deployment, and security.

Adds diagrams and expands the ATC demo path so the cockpit is fully described in-repo.

docs/FEATURES.md

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+# Features
+
+## Topology & visualization
+
+- Layouts: Orbit, Galaxy, Clusters, Lanes, Helix
+- Color modes: Status, Power, Connection, Model, Subnet
+- Live pulse packets on connected OME links (toggleable)
+- Pan / zoom / Reset view (fit-to-fleet)
+- Hover tips; click = inspector; double-click = Quick Connect
+- Ghost offline links optional
+
+## Filters & focus
+
+- Include toggles: Servers, iDRACs (both off → empty map + message)
+- Connected only, Powered on, Has power reading, Min watts, Search
+- Network / model / group rails
+- Clear / Reset filters restores defaults
+- KPI **Apply as map filter** aligns map to the KPI cohort
+
+## KPI fleet context popups
+
+Every top KPI tile opens an interactive modal:
+
+- Nodes, Servers, iDRACs, Connected, Offline, Powered on, Live power, Avg/node, Power samples
+- Summary pills, search, sort
+- Per-device actions: Focus, SSH, Quick Connect, Inventory, Chat, iDRAC Web
+
+## Inspector & inventory
+
+- Live identity, connection, power fields
+- Soft-refresh on fleet poll (does not wipe loaded inventory)
+- Full inventory + application/firmware landscape from OME `InventoryTypes`
+- Inventory cache per device id
+
+## Live feed & notifications
+
+- Collapsible / lightly draggable live feed
+- Merged events + alerts + hottest power
+- **New device / removed device** toasts + notify cards when OME inventory changes after baseline poll
+
+## Triage
+
+- Critical / Warning / Events / Hottest / All feed
+- Search, detail pane, jump to connect / chat / tickets
+
+## Quick Connect
+
+- iDRAC Web (new tab)
+- SSH terminal (in-app)
+- Ask AI / Inspector shortcuts
+- No hardcoded `ssh://root@…` links
+
+## In-browser SSH
+
+- Username + password login popup (username remembered locally)
+- xterm.js vendored locally
+- Fleet IP allowlist; multi-user session caps
+
+## Cockpit chat
+
+- Model selector (Open WebUI catalog + vLLM)
+- Fleet-aware system context (budgeted for 4096-token models)
+- Quick prompts; focus device context
+- Backends: vLLM direct or Open WebUI virtual models
+
+## Ops desk
+
+- Tickets for Jody / Laurens handoff
+- Create, accept, assign, status, notes, delete
+- Persisted in SQLite
+
+## GPU matrix
+
+- Live V100 cards from metrics sidecar
+- Shown in left rail + available to chat context
+
+## Branding / chrome
+
+- Dell logo → cockpit home
+- Ticker with pulse, power, alerts, visible count
+- Drawers: Chat, Ops, OpenManage AI iframe