[feat] roadmap 14 batch CN - Connect UX: state machine, disconnect, info drawer, invite ~srv - #40

…nfo drawer, invite ~srv

The Connect pill becomes a three-state machine with professional session controls,
the always-on server indicator moves into an (i) info drawer, and invite links can
pin the signaling world.

- connectionState.js (NEW, store-only): sessionHost (set when OUR outbound request
  is approved; null = hosting), peerJoinedAt, resetSession. Cleared per-peer in
  handleDisconnected.
- Connect.svelte: state derives from OPENED peers (never userdata.length - the
  roster fills at dial time). idle = dial input + blue Connect + (i); pending =
  disabled input + AMBER Cancel + pulsing "Waiting for approval..." (aria-live);
  connected = NO input, green dot + "Connected · <host> [+N]" + RED Disconnect.
  data-state attr for e2e. copy() appends the invite ~srv param and guards the
  "Generating..." pre-id state.
- peerApproval.cancelOutboundRequest: unwind a pending dial (queue entry, conn -
  deleted BEFORE close so the onConnClose stale-guard and the restore retry loop
  both stand down - whitelist, sessionHost). Also wired into the outbound-pending
  toast (Cancel button).
- PeerConnection.leaveSession(): close every conn with EXPLICIT full teardown
  (handleDisconnected + env-presets/hand-model drops - close events are often
  never signaled), roster reset to self, queues cleared; NO peer.destroy() so the
  invite id stays valid.
- ConnectInfoDrawer.svelte (NEW): Session (state badge, own id, host, per-peer
  rtt/relay via the now-exported qColor + joined-ago, inline cancel) / Server
  (resolved server, fallback warning, measured ping via the peerjs info endpoint,
  discovery probe 200/401) / cloud drawerSlot mount (rooms settings land here in
  batch RM). Outside-close via a WINDOW pointerdown listener - a fixed catcher
  would size to the pill, not the viewport (.connect-wrap's translateX is the
  containing block for fixed descendants; the CLAUDE.md transform gotcha).
- Invite ~srv (peerServer.js): inviteServerParam (empty for default resolution;
  ~srv=public on fallback/explicit-public-with-self-hosted; encoded host:port/path
  for custom) + parseInviteHash/decodeInviteServer + applyInviteServerOverride
  consulted FIRST in resolvePeerOptions/describePeerServer (session-only, never
  falls back). Parsed at the TOP of the PeerConnection constructor (the
  peer.on('open') hash flow runs too late for server selection); only the ~srv
  tail is stripped so hash auto-connect is unchanged.
- FIX (latent): dialing while the signaling link is down threw inside
  peer.connect() (undefined conn) and silently stranded the request - now guarded
  in Connect + connectToPeer + restoreConnection with clear toasts.
- FIX: the Users peers-trigger showed a phantom peer while an outbound request was
  pending (userdata gate) - now also gated on openedPeers.
- e2e: ui-polish I5 block migrated to the drawer (+ fallback badge/warning/outside
  -close checks); NEW connect-states suite (19 checks: idle->pending->Cancel full
  store unwind, no retry resurrection, ~srv encode/parse/decode round-trips,
  copied link carries the param; two-peer connected/Disconnect block env-gated via
  TWO_PEER=1).

svelte-check 498/76 (below the 499/77 baseline), build green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>