Remove unused scripts/dead code and fix README accuracy

[Copilot]

Several modules were loaded by simulations that never used them, and graph-renderer.js contained dead methods duplicated by graph-modal.js. The README made false claims about material sharing and visual effects coverage.

Script load cleanup

• Removed physics.js from all 7 mechanical test HTML files — the Physics object is only consumed by sim-2d.js / sim-3d.js
• Removed particle-system.js from fatica-flessione.html and fatica-termica.html — both fatigue sims implement crack visuals directly on THREE.PlaneGeometry and never call any ParticleSystem.* method

Dead code removal (graph-renderer.js, −170 lines)

drawExpandedPositionGraph and drawExpandedEnergyGraph were defined but never called; graph-modal.js already has its own parallel implementations. Both methods removed.

README corrections

Section	Before	After
Shared Modules	shared-materials.js described as shared across all simulators	Scoped to tensile/compression/bending only
Shared Modules	particle-system.js described without scope	Scoped to the five classic mechanical tests
Materials	"Seven materials available across all mechanical tests"	Separate tables for torsion/shear (shear properties) and fatigue sims (fatigue-specific params, different material sets)
Visual Effects	Fatigue sims implied to use particle-system.js	Fatigue sims noted as using geometry-based crack propagation

Original prompt

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This section details on the original issue you should resolve

<issue_title>Update all Features</issue_title>
<issue_description>There have been some heavy changes recently and some previous minor features that worked with other features may have changed. Perform a complete check and bring all features left behind to the current tech as many things changed. Take your time to explore and learn the codebase

Rewrite Readme and the docs and check the code too to make it more sorted and simpler to navigate, remove anything that we don't need and improve the experience overall. Explain how everything works</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Update all Features #77

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[ghost]

@copilot Is it complete? Does everything works as designed? Is it ready to merge to prod?

[Copilot]

@copilot Is it complete? Does everything works as designed? Is it ready to merge to prod?

Yes, it's complete and verified — here's what was confirmed:

All 10 HTML pages: every <script> and <link> tag resolves to a file that exists on disk. No broken references.

Script-load cleanup (commit 4fd3502):

• physics.js removed from all 7 mechanical test pages — confirmed zero Physics.* calls in any of those 7 simulators.
• particle-system.js removed from fatica-flessione.html and fatica-termica.html — confirmed zero ParticleSystem.* calls in both fatigue simulators. The 5 classic tests (tensile, compression, bending, torsion, shear) still load and use it correctly.

Dead-code removal (graph-renderer.js):

• Only the 8 methods that are actually called remain: drawBackground, drawGrid, drawAxis, drawTitle, calculatePositionScale, calculateEnergyScale, drawPositionGraph, drawEnergyGraph. Both Hooke simulations still call GraphRenderer.drawPositionGraph and GraphRenderer.drawEnergyGraph correctly.

All shared modules wired correctly:

• PerformanceMonitor — 2 calls (init + update) in all 9 simulators ✓
• ChartModal — present in all 7 mechanical test simulators ✓
• SHARED_MATERIALS / getCachedMaterial — used only by tensile/compression/bending as documented ✓

Ready to merge.

[Copilot]

Pull request overview

This PR reduces unused client-side script loading across the mechanical-test simulation pages, removes unused/duplicated graph-renderer functionality now covered by graph-modal.js, and updates the README to accurately reflect current module/material/effects scope.

Changes:

• Removed unused <script> loads (physics.js across mechanical tests; particle-system.js from fatigue simulations).
• Deleted unused expanded-graph drawing methods from src/js/graph-renderer.js (modal graphs are handled by graph-modal.js).
• Corrected README module scope, materials breakdown, and visual-effects notes.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
trazione.html	Stops loading physics.js (keeps only modules used by tensile simulation).
compressione.html	Stops loading physics.js (keeps only modules used by compression simulation).
flessione.html	Stops loading physics.js (keeps only modules used by bending simulation).
torsione.html	Stops loading physics.js (torsion uses particle effects but not Physics).
taglio.html	Stops loading physics.js (shear uses particle effects but not Physics).
fatica-flessione.html	Stops loading physics.js and particle-system.js (fatigue sim does geometry-based cracking).
fatica-termica.html	Stops loading physics.js and particle-system.js (fatigue sim does geometry-based cracking).
src/js/graph-renderer.js	Removes unused expanded-graph functions duplicated by modal implementation.
README.md	Updates documentation to match actual module usage/material tables/effects implementation.

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