feat(agentos): redesigned dashboard inspector on the TS actor runtime

[NicholasKissel]

• Redesigns the inspector into transcript, filesystem, and system tabs with permission approvals, VM status badges, software logos, and a filesystem workbench; the built-in rivetkit tabs are hidden
• Adds an observe-only health action (post-mortem limit-warning and agent-exit buffers that survive VM sleep, never boots the VM) as an actor extra alongside the preview-URL actions
• Registers the inspector tabs via the actor inspector config so the dashboard serves them without extra setup
• Permission approvals ride the durable session surface (listSessions waiting-state backfill plus sessionEvent permission entries); responses render each request's own ACP options
• Anchors the assets/ gitignore so the inspector SVG sources stay tracked
• Documents the inspector (new docs page, nav entry, and cross-links from quickstart, debugging, sessions, and architecture)

Supersedes #1752, rebuilt on the TS actor runtime without the terminal tab.

[railway-app]

🚅 Deployed to the agentos-pr-1780 environment in agentos

Service	Status	Web	Updated (UTC)
agentos	😴 Sleeping (View Logs)	Web	Jul 19, 2026 at 7:13 am

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🚅 Environment agentos-pr-1780 in rivet-frontend has no services deployed.