fix: improve stability - timeouts, parameter setting, Camoufox retry, error handling

[maebahesioru]

Summary

Comprehensive stability improvements based on real-world log analysis.

Fixes

Parameter Setting

• Use fill() instead of type() for spinbutton inputs (fixes decimal truncation: 1.0 → 10 → clamped to 2)
• Re-expand advanced settings panel if parameter inputs not visible
• scroll_into_view_if_needed before interacting with Google Search toggle and stop sequence input

Submission

• Submit Button wait timeout: 2s → 10s
• Textarea locator timeout: 5s → 15s
• If shortcut fails but response already started, treat as success (avoids false 500 errors)

Camoufox Launch

• Retry up to 3 times on WebSocket endpoint timeout
• Find free port before each attempt to avoid EADDRINUSE
• Early exit on EADDRINUSE detection (no need to wait full 90s)

Error Handling / Log Noise

• Downgrade TargetClosedError in model management and localStorage init to DEBUG
• Downgrade noisy button check warnings to DEBUG
• STREAM proxy: retry with port increment on failure

Other

• Clear chat verification: fallback to textarea when zero_state not visible
• Tools panel / Google Search: skip if button not found (new UI layout)
• Fuzzy model ID matching when model not in parsed_model_list
• SLEEP_LONG 0.5s → 1.0s