refactor(studio): split oversized files and raise line limit to 600

Split PlayerControls.tsx into focused sub-components (SeekBar,
WorkAreaOverlay, MuteButton, LoopButton, FullscreenButton,
ShortcutsPanel, SpeedMenu) and extracted seek bar drag/progress
tracking into useSeekBarDrag hook.

Split manualEditsDom.ts patch-builder functions into
manualEditsDomPatches.ts with data-driven helpers to reduce
duplication and complexity.

Extracted per-type reapply helpers from reapplyPositionEditsAfterSeek
and factored out identity-matrix check from
stripGsapTranslateFromTransform.

Raised file-size limit from 500 to 600 lines, removed
.filesize-allowlist.

Author: miguel-heygen

.filesize-allowlist

@@ -469,7 +469,7 @@ jobs:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           fetch-depth: 0
-      - name: Check file sizes (max 500 lines)
+      - name: Check file sizes (max 600 lines)
         # Scoped to files THIS PR changed under packages/studio. Walking the
         # whole tree blamed every unrelated PR for pre-existing offenders.
         # Falls back to a full scan on push events (no base ref available)
@@ -494,10 +494,9 @@ jobs:
           for f in "${files[@]}"; do
             [ -z "$f" ] && continue
             [ -f "$f" ] || continue  # skip files deleted in this PR
-            if grep -qxF "$f" .filesize-allowlist 2>/dev/null; then continue; fi
             lines=$(wc -l < "$f")
-            if [ "$lines" -gt 500 ]; then
-              echo "::error file=$f::$f has $lines lines (max 500)"
+            if [ "$lines" -gt 600 ]; then
+              echo "::error file=$f::$f has $lines lines (max 600)"
               EXIT=1
             fi
           done

.github/workflows/ci.yml

@@ -21,18 +21,16 @@ pre-commit:
       glob: "packages/**/*.{ts,tsx,mts,cts,js,jsx,mjs,cjs}"
       run: bunx fallow audit --base origin/main --fail-on-issues
     filesize:
-      # Scoped to packages/studio — the 500 LOC limit is a studio architecture
+      # Scoped to packages/studio — the 600 LOC limit is a studio architecture
       # standard enforced as part of the App.tsx decomposition work. Player and
       # other packages enforce size discipline via code review and convention.
-      # Files temporarily over the limit are listed in .filesize-allowlist.
       glob: "packages/studio/**/*.{ts,tsx}"
       exclude: "(\\.test\\.(ts|tsx)$|\\.generated\\.)"
       run: |
         for f in {staged_files}; do
-          if grep -qxF "$f" .filesize-allowlist 2>/dev/null; then continue; fi
           lines=$(wc -l < "$f")
-          if [ "$lines" -gt 500 ]; then
-            echo "ERROR: $f has $lines lines (max 500) — add to .filesize-allowlist if temporarily needed"
+          if [ "$lines" -gt 600 ]; then
+            echo "ERROR: $f has $lines lines (max 600)"
             exit 1
           fi
         done