Fix reset aircraft clearing, console history drafts, log-stream rendering and 3D model fallback

[amorfinv]

Five independent defects, one commit each.

fix(proxy): clear aircraft on the RESET topic, not on an ACDATA action

BlueSky signals a simulation reset on the dedicated RESET topic, but the clear lived in on_acdata_received, keyed off a context action that bluesky_client synthesised from the shared-state wrapper. That mapping made the ACDATA path clear traffic on frames it should only have forwarded, while a real RESET left proxy.traffic_data populated.

• bluesky_client records the wire action verbatim and hands handlers the unwrapped data dict.
• on_reset_received clears the cached traffic and emits an empty acdata alongside the existing poly/polyline clears, still scoped to the active node. It clears even with no browser attached — on_acdata_received only refreshes the cache while clients are connected, so a stale cache would be served verbatim in the next initial_data snapshot (ghost aircraft on the next page load).
• node_manager drops the previous node's cached traffic on an active-node switch, so it can't be re-served before the new node's first frame.

fix(console): keep the unsubmitted draft across history navigation

ArrowUp discarded whatever was typed on the fresh input line, and ArrowDown back past the newest entry restored '' instead of it — a half-written command was lost by glancing at history. CommandHistory now stashes the draft like a shell. Also skips consecutive duplicates on add() and folds the two arrow-key branches in Console into one navigateHistory().

fix(log-stream): render split lines whole and ignore stale poll responses

The tail endpoint returns raw bytes, so a poll can land mid-line and the remainder arrives in the next chunk — one log line rendered as two. The trailing fragment is now buffered and re-rendered in place. Plus: in-flight fetches resolving after stopStreaming() or a file switch appended the old stream's content and clobbered the offset (fixed with a generation counter); a backwards offset now replaces the display instead of appending under the old content; Ctrl+F only opened search on lowercase f.

fix(aircraft-3d): fall back to the default model when a GLB fails to load

A model that 404s or fails to parse left its aircraft queued in pendingAircraft forever — invisible in 3D — and the loader re-requested the broken path on every data tick, since only loadingModels was cleared on error. The loader now records failed paths and reports them; redirectPending() re-creates stranded aircraft with the fallback model or drops them with a warning. Failures clear with the cache so a model reload retries.

chore: drop comments that restate the code

Docblocks that repeat the method name, in the files touched above.

Note

frontend/package-lock.json has an unrelated local change (removal of libc metadata from optional platform deps, an npm-version artifact) and is not part of this branch — it is still uncommitted locally.

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