fix: implement true glissando for Glide block (Related to #7257)

[Prince1895]

Description

This PR resolves the broken glissando behavior in the Glide block and fulfills the TODO comment previously left in OrnamentBlocks.js.

Previously, the Glide block played nested notes as distinct, disconnected pitches. This PR fixes the duration calculations and audio scheduling to correctly interface with Tone.js's native portamento feature, resulting in a smooth, continuous pitch slide (a true glissando).

(Note: In addition to the glissando fix, 14 preexisting eqeqeq lint warnings in js/turtle-singer.js were fixed to satisfy the husky pre-commit hooks).

Related Issue

This PR fixes #7257

PR Category

• Bug Fix — Fixes a bug or incorrect behavior
• Feature — Adds new functionality
• Performance — Improves performance (load time, memory, rendering, etc.)
• Tests — Adds or updates test coverage
• Documentation — Updates to docs, comments, or README

Changes Made

• js/turtle-singer.js: Fixed duration calculation bug. The glissando duration tur.singer.glideOverride is now properly multiplied by bpmFactor instead of dividing it. Applied the same tempo-scaling fix to the portamento variable. Fixed 14 loose equality == / != warnings.
• js/utils/synthutils.js: Passed the scheduled audio time (Tone.now() + future) to the synth.setNote() calls so pitch changes are correctly synced in the audio graph.
• js/blocks/OrnamentBlocks.js: Removed the outdated TODO comment regarding the lack of glissando support.

Testing Performed

• Started local server and tested the Glide block using multiple internal Note blocks.
• Verified that synthesized instruments (e.g., sine, electronic synth) now slide smoothly in pitch rather than playing discrete notes.
• Verified that the npm run lint and npx prettier --check . hooks pass successfully.

[github-actions]

🧪 Jest Test Results

✅ All Jest tests passed! This PR is ready to merge.

Coverage: Statements: 46.9% | Branches: 38.4% | Functions: 51.3% | Lines: 47.32%