feat: console improvements

[FjamZoo]

Description

Bunch of improvements for the console view

• Fix console auto-scroll: the scroll effect never ran on new output, only on checkbox toggle
• Replace the auto-scroll checkbox with devtools-style follow mode: scrolling up pauses, a floating "N new lines" pill jumps back down; line trimming is suspended while scrolled up so the buffer can't shift under the reader
• Intercept clear / cls client-side to clear the console view instead of erroring as an unknown server command
• Add an output filter (toggle button + bar): case-insensitive, ANSI-stripped matching with a match counter
• Batch console output core-side: lines now broadcast as lines arrays with a leading-edge 50ms throttle and a monotonic seq per line (stable React keys, duplicate-drop against the initial dump); LogLine is memoized so new output no longer re-renders/re-parses the whole list
• Add WebSocket auto-reconnect with exponential backoff (500ms→10s) and subscription replay on reconnect; subscriptions are refcounted, fixing live channels dying when one of several subscriber components unmounted

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Tests

• Tested in development mode
• Passes typecheck
• Builds & runs on Windows
• Builds & runs on Linux

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Additional Notes

N/A