chore: cleanup TypeScript, update docs, scripts, Dockerfile

- Delete all frontend TypeScript source (src/, index.html, package.json, etc.)
- Move static assets to frontend/static/ (style.css, manifest.json)
- Update scripts/build and scripts/test (no npm steps)
- Update Dockerfile (no frontend build step)
- Update README.md and AGENTS.md for Hyperbole stack

README.md

@@ -1,17 +1,67 @@
 # Sis
 
-Sis (short for Sisyphus) is a todo tracker meant primarily for households, families or other groups of people with shared repeated responsibilities like chores.
+Sis (short for Sisyphus) is a todo tracker meant primarily for households,
+families or other groups of people with shared repeated responsibilities like
+chores.
 
-The goal of Sis is to make it easy for users to keep track of which tasks need to be completed and when while allowing any user to complete a given task and provide visibility to other users that a task has been completed.
+The goal of Sis is to make it easy for users to keep track of which tasks need
+to be completed and when while allowing any user to complete a given task and
+provide visibility to other users that a task has been completed.
 
-Sis is primarily a web application but includes push notification support for end users to notify them about upcoming/overdue tasks as well as task completion.
+Sis is a web application written entirely in Haskell using
+[Hyperbole](https://github.com/seanhess/hyperbole), a serverside web framework
+inspired by HTMX, Elm, and Phoenix LiveView. There is zero application
+JavaScript in the source code.
 
-## Frontend
+## Stack
 
-The Sis UI a single-page application written in Javascript using https://mithril.js.org/ and uses the "Neo Brutalism" CSS framework - https://unpkg.com/neobrutalismcss@latest
+- **Framework:** [Hyperbole](https://github.com/seanhess/hyperbole) — Haskell serverside web framework
+- **CSS:** [Neo Brutalism](https://unpkg.com/neobrutalismcss@latest) CDN
+- **Database:** SQLite via sqlite-simple with effectful effect system
+- **Build:** Stack with GHC 9.10
 
-Sis uses Typescript for front-end code
+## Architecture
 
-## Backend
+Sis is a single Haskell application. All HTML is rendered serverside via
+Hyperbole's Page/HyperView system. User interactions are sent over WebSocket
+with VirtualDOM-based page updates.
 
-The Sis backend is written in Haskell using Orb for the HTTP framework - https://github.com/flipstone/orb
+```
+sis/
+├── app/Main.hs              # Hyperbole app entry, Warp setup, route dispatch
+├── src/
+├─├── Sis.hs                 # Top-level re-exports
+│   ├── Sis/Route.hs         # Route ADT
+│   ├── Sis/Types.hs         # Core domain types
+│   ├── Sis/Database.hs      # effectful DB effect + SQLite handler
+│   ├── Sis/Auth.hs          # Password hashing
+│   ├── Sis/Page/            # One module per page
+│   │   ├── Login.hs
+│   │   ├── Signup.hs
+│   │   ├── Dashboard.hs
+│   │   ├── Chores.hs
+│   │   ├── Household.hs
+│   │   └── Activity.hs
+│   ├── Sis/View/            # Reusable view components
+│   │   └── Layout.hs
+│   └── Sis/Style.hs         # Neo Brutalism class helpers
+├── frontend/static/         # Static CSS + PWA manifest
+├── test/Spec.hs             # Hspec test suite
+├── scripts/                 # build, test, run
+├── package.yaml             # Haskell deps (hpack source of truth)
+├── stack.yaml               # Stack resolver config
+└── Dockerfile               # Production image
+```
+
+## Development
+
+```bash
+# Build
+./scripts/build
+
+# Test
+./scripts/test
+
+# Run (starts on port 8080)
+./scripts/run
+```