Initial commit — Meridian OS browser desktop demo

PRD.md

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+# Meridian OS — PRD
+
+## Vision
+A browser-based desktop environment for a video game. Elegant, restrained,
+gamer-literate without being loud. No emoji stuffing, no AI-slop aesthetics.
+
+## Personas
+- Player who boots the in-game computer and wants to feel at home.
+- Easter-egg hunter who wants rewards for exploration.
+
+## Core Requirements
+1. Login screen (any username, stored locally, avatar = initials).
+2. Desktop with changeable wallpaper (gallery of 6 curated gradients/images).
+3. Taskbar: start-equivalent launcher, active apps, widgets tray, status bar.
+4. Status bar: username, time (live), connection state, date.
+5. Widgets: date, active applications. Optional: achievements tray.
+6. Window manager: drag, focus, minimize, close. Multi-window.
+7. Apps:
+   - Notepad (text editing, localStorage persistence)
+   - Music player (3 tracks, play/pause/skip/seek, volume)
+   - Terminal (command parser, easter eggs, ANSI-ish styling)
+   - Spoof: Steam, VS Code, Postman, Chrome (static-but-believable UIs)
+8. Special feature: Achievement system (game-flavored, tracks real usage).
+
+## Non-Requirements
+- Real authentication
+- Real networking
+- Real OS features (files beyond localStorage)
+
+## Aesthetic Direction
+- Palette: slate/graphite base (#0f1114, #1a1d21, #252a31), amber accent (#d4a24c).
+- Type: Inter (400/500/600).
+- Borders: 1px rgba(255,255,255,0.06–0.1).
+- Shadows: subtle only; never blurry-neon.
+- Motion: 150–220ms ease-out; no bounce, no parallax.
+- No emojis in chrome. Allowed sparingly in content (terminal output, toasts).
+
+## Easter Eggs (Terminal)
+Elden Ring: praise_the_sun, tarnished, "try finger, but hole"
+CoD: dropshot, 360_noscope, mw2
+FIFA: siuuu, golazo, wonderkid
+Misc: konami, matrix, sudo rm -rf /
+
+## Achievements (sample)
+- "First Grace" — log in for the first time (ER)
+- "Getting Tactical" — run 5 terminal commands (CoD)
+- "Career Mode" — open 3 different apps (FIFA)
+- "Tarnished Typist" — type 500 chars in notepad
+- "DJ" — play music for 30s straight
+- "Speedrun" — open and close a window in under 2s
+- "Dataminer" — find all 3 hidden terminal commands
+
+## Success Criteria
+- Loads in <2s on localhost.
+- No console errors on a cold boot.
+- Every app opens, stays usable, closes cleanly.
+- At least 5 achievements unlockable through ordinary play.
+- Zero emoji-stuffed UI elements. Zero gradient soup.
+
+## Storage of This Doc
+Decide at end: Docmost (team-readable), Plane (sprint-attached), or local.