Fix Pi Villani UI status copy and preserve safe tool inputs

[mmprotest]

Motivation

• Prevent the Pi UI from displaying "unknown" file placeholders and preserve useful, non-sensitive tool input (paths/commands) in bridge events.
• Make the Villani UI use characteristic Villani-style status copy that rotates deterministically and reduce noisy notifications while keeping assistant text literal.
• Ensure approval prompts remain readable and exact and that tool widgets show real file/command details.

Description

• Preserve safe tool input in the bridge by adding safe_tool_input and extract_tool_path and including input, path, and command fields for tool_started, tool_result, and tool_finished events in villani_code/integrations/pi_bridge.py while excluding sensitive or large fields.
• Replace generic status lines with a Villani copy bank in integrations/pi-villani/src/render.ts, add deterministic selection via copyCounters and villaniCopy(), and export resetVillaniCopyCounters() for tests.
• Add helpers pathFromEvent, commandFromEvent, and categoryForEvent and map runner/command/tool events to Villani copy categories (thinking, analysis, reading, writing, running, testing, debugging, review, failure, complete).
• Update toolStartedMessage, reduceVillaniUiState, widgetForState, and renderBridgeEvent so the UI shows Villani status messages and a widget with File: or Command: details (no "unknown" placeholders) and avoids notify spam for every tool/command start while keeping assistant stream_text unchanged.
• Keep approval title/message literal and readable via existing approvalTitle/approvalMessage behavior in integrations/pi-villani/src/index.ts (approval prompt retains exact Command:/File: lines).
• Add and update tests: Python tests in tests/integrations/test_pi_bridge.py to assert safe input/path/command preservation and exclusion of secrets/large content, and Node tests in integrations/pi-villani/src/render.test.ts and updates to integrations/pi-villani/src/extension.test.ts to validate Villani copy selection, no-unknown-file messages, deterministic rotation, assistant text preservation, and approval message readability.

Testing

• Ran the Python integration tests with pytest -q tests/integrations/test_pi_bridge.py, which passed (43 passed).
• Built and ran the Pi UI tests with cd integrations/pi-villani && npm test, which ultimately passed (85 passed across the suite) after the render changes.
• New/modified tests cover: preservation of input.path / input.file_path / command, exclusion of content/credentials from bridge events, Villani copy rotation and category mapping, no "unknown" file copy in UI, assistant stream_text rendering unchanged, and approval prompt formatting.

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Codex Task