Add GPU, network, disk, battery & UI enhancements

Introduce expanded metrics, UI, and configuration support: add collectors for network, disk, battery, temperature and delta computation (with tests), and pluggable GPU backends (Apple/NVIDIA/AMD). Enhance the Bubble Tea model and UI with sparklines, themes, process detail overlay, mouse support, kill/export actions, improved selection handling, and responsive two-column layout. Add CLI flags and JSON config file loading (~/.config/hideTop/config.json) and propagate options to the collector (SkipGPU/SkipTemp). Also add a CI workflow (GitHub Actions) and various UI/metrics files to support the new features.

Author: youhide

.DS_Store

@@ -0,0 +1,49 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: ["1.23", "1.24"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Build
+        run: go build ./...
+
+      - name: Test
+        run: go test -race -count=1 ./...
+
+      - name: Vet
+        run: go vet ./...
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.24"
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: latest

.github/workflows/ci.yml

@@ -6,24 +6,40 @@ Built with [Bubble Tea](https://github.com/charmbracelet/bubbletea) and [Lip Glo
 
 ## Features
 
-- **CPU** — total + per-core utilisation bars with core count, colour-coded by load
-- **GPU** *(Apple Silicon)* — total + per-engine (Tiler / Renderer) utilisation, core count, frequency, thermal pressure indicator, and heuristic energy impact score. Auto-detected at runtime; hidden on unsupported hardware
-- **Memory** — used / total / available GiB with bar; conditional swap bar when swap is active
+- **CPU** — total + per-core utilisation bars with core count, colour-coded by load, sparkline history
+- **GPU** — total + per-engine utilisation, core count, frequency, thermal pressure indicator, and heuristic energy impact score. Auto-detected at runtime; hidden on unsupported hardware. Supports **Apple Silicon** (ioreg), **NVIDIA** (nvidia-smi), and **AMD** (sysfs)
+- **Memory** — used / total / available GiB with bar; conditional swap bar when swap is active; sparkline history
 - **Load Average** — 1 / 5 / 15 minute
-- **Processes** — sortable by CPU, memory, or PID with visual sort indicators (▲/▼); PID-based row selection (↑↓ / j/k); incremental search (`/`); auto-scrolling viewport
-- **Refresh control** — `+`/`-` to adjust interval with visual flash feedback
-- **Configurable** — `--interval` flag (default 1s, minimum 100ms)
+- **Temperature** — up to 6 sensors in a 2-column grid, auto-detects CPU/GPU temps, colour-coded by threshold (green < 60°C, yellow 60–80°C, red > 80°C). Disable with `--no-temp`
+- **Network** — total in/out throughput (bytes/s), per-interface breakdown (up to 4 active interfaces)
+- **Disk** — total read/write throughput (bytes/s), root filesystem usage
+- **Battery** — percentage and charging status in the header bar (macOS via `pmset`, Linux via sysfs)
+- **Processes** — sortable by CPU, memory, or PID with visual sort indicators (▲/▼); columns for PID, state (R/S/Z/T), user, name, threads, CPU%, MEM%; PID-based row selection; incremental search by name, PID, or username; tree view; system process filter; process detail panel (Enter); kill / force kill with confirmation
+- **Themes** — 5 built-in themes: `dark` (default), `light`, `dracula`, `nord`, `monokai`
+- **Responsive layout** — two-column layout at ≥ 110 cols, single-column stacked on narrower terminals
+- **Mouse support** — scroll wheel to navigate process list, click to select
+- **Export** — snapshot to JSON with `e`
+- **Configurable** — CLI flags and `~/.config/hideTop/config.json`
 
 ## Keyboard shortcuts
 
 | Key | Action |
 |-----|--------|
 | `↑` `↓` / `j` `k` | Move process selection |
-| `/` | Start incremental search, `Esc` to cancel |
+| `/` | Start incremental search (name, PID, or user), `Esc` to cancel |
+| `Enter` | Open process detail panel |
 | `c` | Sort by CPU% (descending) |
 | `m` | Sort by MEM% (descending) |
 | `p` | Sort by PID (ascending) |
-| `+` `-` | Increase / decrease refresh interval |
+| `t` | Toggle tree view |
+| `s` | Toggle system process filter |
+| `x` | Kill selected process (SIGTERM, asks for confirmation) |
+| `K` | Force kill selected process (SIGKILL, asks for confirmation) |
+| `+` / `=` | Increase refresh interval (+250ms) |
+| `-` / `_` | Decrease refresh interval (-250ms) |
+| `e` | Export snapshot to JSON |
+| `?` | Toggle help overlay |
+| `Esc` | Close help / detail / cancel search |
 | `q` / `Ctrl+C` | Quit |
 
 ## Installation
@@ -39,40 +55,87 @@ brew install hidetop
 go build -o hideTop ./src/
 ./hideTop                     # default 1s refresh
 ./hideTop --interval 500ms    # faster refresh
+./hideTop --theme dracula     # use dracula theme
+./hideTop --no-gpu --no-temp  # disable GPU and temperature panels
 ./hideTop --version           # print version and exit
 # local build with git tag in --version:
 go build -ldflags "-X main.Version=$(git describe --tags --always --dirty)" -o hideTop ./src/
 ```
 
+## Configuration
+
+CLI flags take precedence over the config file.
+
+| Flag | Default | Description |
+|------|---------|-------------|
+| `--interval` | `1s` | Metrics refresh interval (min 100ms) |
+| `--theme` | `dark` | Colour theme (`dark`, `light`, `dracula`, `nord`, `monokai`) |
+| `--no-gpu` | `false` | Disable GPU metrics |
+| `--no-temp` | `false` | Disable temperature metrics |
+| `--debug` | `false` | Enable debug logging to stderr |
+| `--version` / `-v` | — | Print version and exit |
+
+### Config file
+
+`~/.config/hideTop/config.json`
+
+```json
+{
+  "interval": "1s",
+  "theme": "dracula",
+  "no_gpu": false,
+  "no_temp": false,
+  "debug": false,
+  "filter_users": ["root", "_windowserver", "nobody"]
+}
+```
+
+The `filter_users` array controls which usernames are hidden when the system process filter (`s`) is active. Defaults to `["root", "_windowserver", "nobody"]` if not set.
+
 ## Project structure
 
 ```
 hideTop/
-├── src/                      # Entry point
-│   └── main.go
+├── src/
+│   └── main.go               # Entry point
 ├── internal/
-│   ├── app/                  # Bubble Tea model, update loop, view
-│   │   └── model.go
-│   ├── config/               # CLI flags & configuration
-│   │   └── config.go
-│   ├── metrics/              # System metrics collectors
-│   │   ├── types.go          # Shared data types (Snapshot, CPUStats, …)
-│   │   ├── collector.go      # Concurrent aggregation of all metrics
+│   ├── app/
+│   │   └── model.go          # Bubble Tea model, update loop, view
+│   ├── config/
+│   │   └── config.go         # CLI flags & config file
+│   ├── metrics/
+│   │   ├── types.go           # Shared data types (Snapshot, ProcessInfo, …)
+│   │   ├── collector.go       # Concurrent aggregation of all metrics
 │   │   ├── cpu.go
 │   │   ├── memory.go
 │   │   ├── processes.go
-│   │   └── gpu/              # Apple Silicon GPU metrics (ioreg-based)
-│   │       ├── gpu.go        # Main collector, types & capability detection
-│   │       ├── engines.go    # Per-engine utilisation parser (Tiler, Renderer)
-│   │       ├── thermal.go    # Thermal pressure via pmset
-│   │       └── energy.go     # Heuristic energy impact calculator
-│   └── ui/                   # Pure rendering functions (Lip Gloss)
-│       ├── styles.go         # Colour palette & shared styles
+│   │   ├── temperature.go
+│   │   ├── network.go
+│   │   ├── disk.go
+│   │   ├── battery.go
+│   │   └── gpu/               # GPU metrics (pluggable backends)
+│   │       ├── backend.go     # Backend interface
+│   │       ├── gpu.go         # Runtime detection & dispatch
+│   │       ├── apple.go       # Apple Silicon (ioreg)
+│   │       ├── nvidia.go      # NVIDIA (nvidia-smi)
+│   │       ├── amd.go         # AMD (sysfs)
+│   │       ├── engines.go     # Per-engine utilisation parser
+│   │       ├── thermal.go     # Thermal pressure (macOS pmset)
+│   │       └── energy.go      # Heuristic energy impact
+│   └── ui/
+│       ├── styles.go          # Colour palette & shared styles
+│       ├── themes.go          # Theme definitions
+│       ├── sparkline.go       # Sparkline renderer
 │       ├── cpu.go
 │       ├── gpu.go
 │       ├── memory.go
-│       ├── processes.go
-│       └── help.go
+│       ├── temperature.go
+│       ├── network.go
+│       ├── disk.go
+│       ├── battery.go
+│       ├── processes.go       # Process table
+│       ├── process_detail.go  # Process detail overlay
+│       └── help.go            # Help bar & overlay
 ├── go.mod
 ├── go.sum
 └── README.md
@@ -82,23 +145,25 @@ hideTop/
 
 | Layer | Package | Responsibility |
 |-------|---------|---------------|
-| **Entry** | `src` | Parse config, wire up Bubble Tea |
+| **Entry** | `src` | Parse config, wire up Bubble Tea, enable mouse & alt screen |
 | **App** | `internal/app` | Bubble Tea Model / Update / View, owns the event loop |
-| **Metrics** | `internal/metrics` | CPU, memory, load, processes via gopsutil; concurrent collection |
-| **GPU** | `internal/metrics/gpu` | Apple Silicon GPU via `ioreg` + `pmset` (no sudo required) |
-| **UI** | `internal/ui` | Pure functions: data in → styled string out |
-| **Config** | `internal/config` | CLI flags, future file-based config |
+| **Metrics** | `internal/metrics` | CPU, memory, load, processes, temperature, network, disk, battery via gopsutil; concurrent collection with graceful degradation |
+| **GPU** | `internal/metrics/gpu` | Pluggable backends: Apple Silicon (`ioreg`), NVIDIA (`nvidia-smi`), AMD (sysfs). No sudo required |
+| **UI** | `internal/ui` | Pure functions: data in → styled string out. Themes, sparklines, process table, detail overlay |
+| **Config** | `internal/config` | CLI flags + `~/.config/hideTop/config.json` |
 
 Key design decisions:
 - **No global mutable state** — all state lives in the Bubble Tea `Model`.
 - **Async collection** — metrics are gathered in a `tea.Cmd` goroutine, so the UI never blocks.
-- **Concurrent collectors** — CPU, memory, load, and processes run in parallel via `sync.WaitGroup`; GPU runs sequentially after (needs CPU total for energy calculation).
+- **Concurrent collectors** — CPU, memory, load, network, disk, battery, temperature, and processes run in parallel via `sync.WaitGroup`; GPU runs sequentially after (needs CPU total for energy calculation).
+- **Graceful degradation** — if a collector fails or times out, the previous snapshot is used and a `stale` indicator appears in the header.
 - **Pure rendering** — UI functions take data + width and return strings. No side effects, easy to test.
 - **Runtime detection** — GPU support is detected via `runtime.GOOS` + `runtime.GOARCH` and cached with `sync.Once`. No build tags needed; the binary works on any platform.
-- **No sudo** — all data sources (`ioreg`, `pmset`, gopsutil) work without elevated privileges.
-- **PID-based selection** — process selection tracks by PID, surviving refresh cycles, re-sorts, and search filters.
+- **No sudo** — all data sources (`ioreg`, `pmset`, `nvidia-smi`, sysfs, gopsutil) work without elevated privileges.
+- **PID-based selection** — process selection tracks by PID, surviving refresh cycles, re-sorts, and search filters. Falls back to same visual position when a process disappears.
+- **Responsive layout** — panels pair in two columns when the terminal is ≥ 110 columns wide, with matched heights.
 
 ## Requirements
 
 - Go 1.25+
-- macOS or Linux (GPU panel requires Apple Silicon)
+- macOS or Linux (GPU panel: Apple Silicon, NVIDIA with nvidia-smi, or AMD with sysfs)