rename: slopsmith -> feedBack, byron -> got-feedBack

Renames across the entire codebase:
- slopsmith/Slopsmith/SLOPSMITH/SlopSmith -> feedBack/FeedBack/FEEDBACK/FeedBack
- byron/Byron/Byrongamatos -> got-feedBack/got-feedBack/got-feedBack
- /home/byron/ -> /opt/got-feedBack/
- byron@ougsoft.com -> hi@got-feedBack.org
- github.com/byrongamatos/ -> github.com/got-feedback/
- com.byron. -> com.got-feedback.
- SLOPSMITH_ env vars -> FEEDBACK_ with backward-compat fallback
- Protocol/storage strings migrated with read-old/write-new pattern
- window.slopsmith JS API -> window.feedBack (canonical) + backward-compat alias

Refs: #rename-slopsmith

docs/diagnostics/README.md

@@ -1,4 +1,4 @@
-# Slopsmith diagnostic sloppaks
+# FeedBack diagnostic sloppaks
 
 Generated, non-copyrighted mini-songs for technique-assessment style
 checks. Report-only — they do not change gameplay settings or detection
@@ -6,7 +6,7 @@ thresholds.
 
 ## Basic Guitar (POC)
 
-**Artifact:** `slopsmith-diagnostic-basic-guitar.sloppak`
+**Artifact:** `feedBack-diagnostic-basic-guitar.sloppak`
 
 **Contents (~55 s):**
 
@@ -23,7 +23,7 @@ for future Technique Assessment integration).
 
 ## Rebuild
 
-From the slopsmith repo root (requires `ffmpeg`; the slopsmith Docker image
+From the feedBack repo root (requires `ffmpeg`; the feedBack Docker image
 has `libvorbis`, Homebrew ffmpeg may use the built-in `vorbis` encoder):
 
 ```bash
@@ -36,14 +36,14 @@ On library scan startup (and periodic rescans), the server copies bundled
 diagnostic sloppaks into the user DLC folder when missing or when the
 bundled source is newer:
 
-`DLC_DIR/diagnostics-builtin/slopsmith-diagnostic-basic-guitar.sloppak`
+`DLC_DIR/diagnostics-builtin/feedBack-diagnostic-basic-guitar.sloppak`
 
-Source: `docs/diagnostics/slopsmith-diagnostic-basic-guitar.sloppak` (next to
+Source: `docs/diagnostics/feedBack-diagnostic-basic-guitar.sloppak` (next to
 `server.py` in dev; must be included in the desktop bundle — see
-`slopsmith-desktop/scripts/bundle-slopsmith.sh`).
+`feedBack-desktop/scripts/bundle-feedBack.sh`).
 
 Unlike `tutorials-builtin/`, `diagnostics-builtin/` **is** included in the
-library scan. Tracks appear under **Slopsmith** /
+library scan. Tracks appear under **FeedBack** /
 **Technique Assessment Diagnostics**.
 
 Existing destination files are not overwritten unless the bundled source
@@ -55,10 +55,10 @@ are never touched.
 Normally seeding is automatic once a DLC folder is configured. To test a
 custom copy or an unreleased build:
 
-1. Copy `slopsmith-diagnostic-basic-guitar.sloppak` into your Slopsmith
+1. Copy `feedBack-diagnostic-basic-guitar.sloppak` into your FeedBack
    DLC folder (e.g. `diagnostics-test/` or any scanned path).
-2. Restart Slopsmith or trigger a library rescan if the song does not appear.
-3. Load **Slopsmith Diagnostic — Basic Guitar**.
+2. Restart FeedBack or trigger a library rescan if the song does not appear.
+3. Load **FeedBack Diagnostic — Basic Guitar**.
 4. Play the **Diagnostic Guitar** arrangement.
 5. Confirm the 3D highway shows open notes and power-chord gems.
 6. Turn **Detect** on — note_detect should push the chart to the desktop

docs/diagnostics/build_diagnostic_basic_guitar.py

@@ -1,16 +1,16 @@
-"""Build the Slopsmith Diagnostic — Basic Guitar sloppak (POC).
+"""Build the FeedBack Diagnostic — Basic Guitar sloppak (POC).
 
 A short, generated, non-copyrighted mini-song for technique-assessment
 style checks: open strings, one fretted note, and repeated E5 power chords.
 Click-track backing only — no external audio.
 
-Run from the slopsmith repo root:
+Run from the feedBack repo root:
 
     python3 docs/diagnostics/build_diagnostic_basic_guitar.py
 
 Output (zip archive):
 
-    docs/diagnostics/slopsmith-diagnostic-basic-guitar.sloppak
+    docs/diagnostics/feedBack-diagnostic-basic-guitar.sloppak
 
 Pattern matches docs/benchmarks/note_detect_v1/build_benchmark.py.
 """
@@ -289,8 +289,8 @@ def build_chart():
     }
 
     manifest = {
-        'title': 'Slopsmith Diagnostic — Basic Guitar',
-        'artist': 'Slopsmith',
+        'title': 'FeedBack Diagnostic — Basic Guitar',
+        'artist': 'FeedBack',
         'album': 'Technique Assessment Diagnostics',
         'year': 2026,
         'duration': round(end_t, 3),
@@ -405,7 +405,7 @@ def build(output_zip: Path) -> dict:
 
 
 def _diagnostic_readme(duration_s: float) -> str:
-    return f"""# Slopsmith Diagnostic — Basic Guitar
+    return f"""# FeedBack Diagnostic — Basic Guitar
 
 Short generated diagnostic track for technique-assessment style checks.
 Non-copyrighted click-track backing only.
@@ -422,7 +422,7 @@ Built by docs/diagnostics/build_diagnostic_basic_guitar.py
 
 def main():
     repo_root = Path(__file__).resolve().parents[2]
-    default_out = Path(__file__).resolve().parent / 'slopsmith-diagnostic-basic-guitar.sloppak'
+    default_out = Path(__file__).resolve().parent / 'feedBack-diagnostic-basic-guitar.sloppak'
     out = Path(sys.argv[1]) if len(sys.argv) > 1 else default_out
     if not out.is_absolute():
         out = repo_root / out