fix: remove stale workspace-mode prompts from persistent_browser.yaml

[nuthalapativarun]

Summary

• Replaced bare final_script.py reference in Helpful Command Patterns with the correct run-folder path final_runs/run_<id>/final_script.py
• Replaced hardcoded final_runs/run_003/ paths in image_qa examples with generic run_<id> placeholders
• Replaced oversimplified done-gate constraint ("final_script.py is the final artifact") with a pointer to the full Completion Gate, including self_reflection and Chromium-release requirements
• Added summary_user_prompt override referencing judge_config.json instead of the default self_reflect_config.json inherited from base.yaml

Why

PR #16 fixed local_browser.yaml and called out that persistent_browser.yaml had the same copy-pasted workspace-mode prompts that don't accurately reflect the execution model. Specifically:

• The bare final_script.py inspect pattern implied the script lives at the workspace root, but in this mode it lives under final_runs/run_<id>/
• The image_qa examples had hardcoded run_003 paths, making them misleading for other run IDs
• The done-gate global constraint only mentioned final_script.py as the final artifact, omitting the required self_reflection pass and Chromium release steps
• The inherited default summary_user_prompt references self_reflect_config.json but this mode uses judge_config.json

Changes

• src/webwright/config/persistent_browser.yaml: prompt cleanup as described above

Testing

pytest tests/ -v

============================= test session starts =============================
platform win32 -- Python 3.14.3, pytest-7.4.4, pluggy-1.6.0
collected 7 items

tests/unit/test_tool_model_routing.py::test_model_claude_sets_top_level_anthropic_model PASSED
tests/unit/test_tool_model_routing.py::test_model_claude_does_not_declare_per_tool_overrides PASSED
tests/unit/test_tool_model_routing.py::test_extract_model_block_reads_top_level_model PASSED
tests/unit/test_tool_model_routing.py::test_extract_model_block_rejects_missing_block PASSED
tests/unit/test_tool_model_routing.py::test_resolve_model_config_path_prefers_explicit_arg PASSED
tests/unit/test_tool_model_routing.py::test_resolve_model_config_path_falls_back_to_workspace_snapshot PASSED
tests/unit/test_tool_model_routing.py::test_resolve_model_config_path_raises_when_nothing_found PASSED

7 passed, 238 warnings in 0.12s