Todo / scratch

What works now

Login → server hits /Users/AuthenticateByName, token+user_id persisted to ~/.config/player/config.json
Subsequent launches skip login, jump straight to library
Library view: 3 columns (artists / albums / tracks), scrollable, click-to-drill
All HTTP is async — http_submit queues a worker thread; http_pump() runs once per frame and fires callbacks on the main thread. UI no longer freezes during fetches or downloads.
MP3 + FLAC playback via vendored dr_mp3.h / dr_flac.h (compiled to modules/audio_decoders/linux/decoders.a — build.jai auto-rebuilds when the .c source is newer). Decoded to s16 PCM and handed to Sound_Player as Sound_Data.LINEAR_SAMPLE_ARRAY.
OGG + WAV continue through Sound.load_audio_data (Sound_Player's native path).
Click a track → downloads (async) → decodes → plays. Auto-advance via Sound_Player's release_asset callback firing track_finished.
Pause/resume via user_volume_scale mute trick (still not a real pause)
Now-playing screen with title/artist/album, transport buttons, scrub bar
Logout button on library top-right clears config.json

Memory leak: each played track leaks its decoded PCM buffer (~50 MB for a 5-min FLAC). The release_asset callback should call decoder_free for MP3/FLAC paths and free for OGG/WAV — currently it only flips track_finished. Track allocation type per-Sound_Data so the release knows which allocator to use.
audio_toggle_pause is volume-mute, not real pause — cursor keeps advancing
No real seek (scrub bar is read-only)
Image cache never evicts — hold for thousands of items but unbounded over a long session (low priority)
Failed image fetches stay marked failed forever; no retry. Often that's right (item has no art) but transient network errors should retry once
gfx/shaders.jai is still Simp.immediate_quad (mirrored bars + bass pulse, but no GLSL fragment shader yet)
client.jai still has the old sync http_get/http_post and Http_Response / build_auth_header — async.jai uses build_auth_header so the helpers stay, but the sync wrappers are dead code now
Stream URL /Audio/{id}/stream returns the original file. If the original is something exotic (Opus, AAC, etc.) it'll fail. Could fall back to /Audio/{id}/universal with audioCodec=mp3 or similar to force-transcode for unsupported formats.

Free the decoded buffer when the stream ends (fix the leak)
Fetch primary image per album, decode with stb_image, upload as Simp.Texture, render in album rows + as backdrop on now-playing
Real FFT (dr_libs author's work? or kissfft) hooked to Sound_Player's mixed output buffer
Custom GLSL fragment shader for the visualizer (replaces the bar stack)
Album-level "play all" button in the album column
Real per-stream pause + seek
Search bar above artists column