Add TUI documentation for F6-F8 screens and regenerate screenshots

Update tui.mdx with Device, Stream, and Config screen sections
including keyboard shortcuts, Tabs/Steps components, and safety
warnings. Update generate_screenshots.py to capture all 11 screens.
Regenerate all SVGs with current sidebar layout.

site/src/content/docs/tools/tui.mdx

@@ -1,11 +1,11 @@
 ---
 title: SkyWalker TUI
-description: Interactive terminal dashboard for spectrum analysis, transponder scanning, signal monitoring, L-band analysis, and carrier tracking.
+description: Interactive terminal dashboard for spectrum analysis, transponder scanning, signal monitoring, L-band analysis, carrier tracking, device management, transport stream analysis, and hardware configuration.
 ---
 
 import { Tabs, TabItem, Steps, Aside, Badge } from '@astrojs/starlight/components';
 
-The SkyWalker TUI is a full-screen terminal dashboard built on [Textual](https://textual.textualize.io/) that wraps all five RF operating modes into a single interactive interface. Sidebar navigation, F-key shortcuts, real-time widget updates, and a dark/light theme toggle replace the separate CLI subcommands with a unified experience.
+The SkyWalker TUI is a full-screen terminal dashboard built on [Textual](https://textual.textualize.io/) that wraps all eight operating modes into a single interactive interface. Five RF signal modes (Spectrum, Scan, Monitor, L-Band, Track) plus Device management, Transport Stream analysis, and hardware Config — all with sidebar navigation, F-key shortcuts, real-time widget updates, and a dark/light theme toggle.
 
 <Badge text="Requires custom firmware v3.02.0+" variant="caution" />
 
@@ -34,7 +34,7 @@ uv run skywalker-tui --demo
 | `--demo` | Synthetic signal data — no SkyWalker-1 USB device needed |
 | `--no-splash` | Skip the startup splash screen |
 | `--verbose, -v` | Verbose USB logging (hardware mode only) |
-| `MODE` | Initial mode: `spectrum` (default), `scan`, `monitor`, `lband`, `track` |
+| `MODE` | Initial mode: `spectrum` (default), `scan`, `monitor`, `lband`, `track`, `device`, `stream`, `config` |
 
 <Aside type="tip">
 Demo mode generates realistic-looking synthetic data for every screen, making it useful for familiarization, documentation, and development without satellite hardware.
@@ -51,6 +51,9 @@ Demo mode generates realistic-looking synthetic data for every screen, making it
 | <kbd>F3</kbd> | Signal monitor |
 | <kbd>F4</kbd> | L-Band analyzer |
 | <kbd>F5</kbd> | Carrier tracker |
+| <kbd>F6</kbd> | Device management |
+| <kbd>F7</kbd> | Transport stream |
+| <kbd>F8</kbd> | Hardware config |
 | <kbd>d</kbd> | Toggle dark/light theme |
 | <kbd>q</kbd> | Quit |
 | <kbd>Ctrl+W</kbd> | Easter egg |
@@ -127,6 +130,84 @@ Carrier/beacon tracker with timestamped logging. Tracks a single frequency and d
 - Event log with timestamped lock/unlock transitions
 - Frequency drift detection
 
+### Device <Badge text="F6" variant="note" />
+
+Firmware management, EEPROM operations, and hardware diagnostics. An identity panel at the top always shows firmware version, serial number, USB speed, and config register flags.
+
+![Device management](../../../assets/tui/device.svg)
+
+<Tabs>
+  <TabItem label="Firmware">
+    - FX2 RAM read at arbitrary addresses rendered as scrollable hex dump
+    - CPU Halt / Start controls for the Cypress FX2 microcontroller
+    - Non-destructive — RAM contents revert on power cycle
+  </TabItem>
+  <TabItem label="EEPROM">
+    - Read full 16 KB EEPROM with progress bar
+    - One-click backup to timestamped `.bin` file
+    - Flash with full safety state machine:
+
+    <Steps>
+    1. **C2 validation** — magic byte, VID/PID match, END marker, record parsing
+    2. **Auto-backup** — saves current EEPROM to timestamped file before any write
+    3. **3-second countdown** — ABORT button auto-focused (accidental keypress = cancel)
+    4. **Page write** — 16-byte pages with progress bar and circuit breaker (3 consecutive errors = abort)
+    5. **Byte-verify** — full readback with diff highlighting in hex view
+    </Steps>
+  </TabItem>
+  <TabItem label="Diagnostics">
+    - Boot test with mode selector (0x80–0x85) showing stage progression
+    - I2C bus scan identifying BCM4500, EEPROM, tuner, and LNB controller
+    - BCM4500 register dump rendered as hex view
+  </TabItem>
+</Tabs>
+
+<Aside type="danger">
+EEPROM flash is the only operation that can brick the device. The safety state machine prevents accidental writes, but a power loss during write will corrupt the boot image. The verify step detects partial writes — if it fails, **do not power cycle** until the flash is retried successfully.
+</Aside>
+
+### Stream <Badge text="F7" variant="note" />
+
+Live MPEG-2 Transport Stream capture and analysis. Reads raw 188-byte TS packets from the SkyWalker-1 bulk endpoint, parses them in real time, and displays PID distribution statistics alongside a hierarchical PSI program structure tree.
+
+![Stream analysis](../../../assets/tui/stream.svg)
+
+- PID distribution table with count, percentage, CC errors, and known PID names
+- PAT/PMT tree display showing transport stream ID, program numbers, PMT PIDs, and elementary stream types (video, audio, data)
+- Aggregate stats: total packets, bytes, unique PIDs, CC errors, duration
+- Capture-to-file mode for saving raw `.ts` files to disk
+- Auto-starts monitoring in demo mode
+
+<Aside type="tip">
+The stream monitor batches UI updates at 500ms intervals to keep the interface responsive even at high packet rates. The USB bulk endpoint is always safely disarmed when monitoring stops.
+</Aside>
+
+### Config <Badge text="F8" variant="note" />
+
+LNB power control, DiSEqC switching, and modulation/FEC configuration — all the hardware settings in one place.
+
+![Hardware configuration](../../../assets/tui/config.svg)
+
+<Tabs>
+  <TabItem label="LNB Control">
+    - Power On / Off toggle
+    - Voltage selection: 13V (vertical) / 18V (horizontal), with optional +1V boost
+    - 22 kHz tone toggle for high-band LNB switching
+    - Current draw warning (450 mA continuous max)
+  </TabItem>
+  <TabItem label="DiSEqC Switch">
+    - Port selector (1–4) sending committed commands
+    - Tone burst A/B for legacy switches
+    - Raw hex message input (3–6 byte DiSEqC 1.0/1.2 commands) with validation
+  </TabItem>
+  <TabItem label="Modulation / FEC">
+    - Modulation type dropdown: QPSK, Turbo QPSK, Turbo 8PSK, DCII Combo, DCII Split I/Q, DCII Offset QPSK, DSS
+    - FEC rate dropdown filtered per modulation group
+    - Symbol rate (256 Ksps – 30 Msps) and frequency inputs
+    - Tune button applies settings to the BCM4500 demodulator
+  </TabItem>
+</Tabs>
+
 ---
 
 ## Easter Eggs
@@ -171,8 +252,10 @@ Use `--no-splash` to skip it.
 
 ## See Also
 
-- [SkyWalker RF Tool](/tools/skywalker/) — CLI version of the same 5 modes (text-only output, scriptable)
+- [SkyWalker RF Tool](/tools/skywalker/) — CLI version of the RF modes (text-only output, scriptable)
 - [Spectrum Analysis](/tools/spectrum-analysis/) — practical how-to guides for each operating mode
 - [Signal Monitoring](/bcm4500/signal-monitoring/) — SIGNAL_MONITOR register protocol and data format
 - [Tuning Tool](/tools/tuning/) — primary tuning, LNB control, and transport stream capture
+- [EEPROM Utilities](/tools/eeprom-utilities/) — standalone CLI for firmware updates (same safety protocol as F6 Device screen)
+- [TS Stream Analyzer](/tools/ts-analyzer/) — standalone TS packet analyzer (same engine as F7 Stream screen)
 - [RF Coverage](/hardware/rf-coverage/) — frequency coverage and antenna considerations

tui/scripts/generate_screenshots.py

@@ -5,7 +5,7 @@ Uses Textual's headless run_test() + Pilot API to programmatically navigate
 each screen and export SVG renders. Requires no hardware — runs entirely
 with DemoDevice synthetic signal data.
 
-Output: ../site/src/assets/tui/*.svg  (8 screenshots)
+Output: ../site/src/assets/tui/*.svg  (11 screenshots)
 
 Usage:
     cd tui && uv run python scripts/generate_screenshots.py
@@ -46,7 +46,7 @@ def _save(svg: str, name: str) -> None:
 
 
 async def capture_mode_screens() -> None:
-    """Capture F1-F5 mode screens."""
+    """Capture F1-F5 RF mode screens."""
     app = _new_app(show_splash=False)
 
     async with app.run_test(size=TERM_SIZE, headless=True) as pilot:
@@ -67,6 +67,61 @@ async def capture_mode_screens() -> None:
             _save(svg, filename)
 
 
+async def capture_device_screen() -> None:
+    """Capture F6 Device screen — show EEPROM tab with hex dump."""
+    app = _new_app(show_splash=False)
+
+    async with app.run_test(size=TERM_SIZE, headless=True) as pilot:
+        await pilot.pause(MOUNT_PAUSE)
+
+        # Switch to Device screen
+        await pilot.press("f6")
+        await pilot.pause(MODE_SWITCH_PAUSE)
+
+        # Wait for identity info to populate
+        await pilot.pause(1.0)
+
+        # Capture Firmware tab (default)
+        svg = app.export_screenshot(title="SkyWalker-1 — Device")
+        _save(svg, "device")
+
+
+async def capture_stream_screen() -> None:
+    """Capture F7 Stream screen — needs time for TS packets to accumulate."""
+    app = _new_app(show_splash=False)
+
+    async with app.run_test(size=TERM_SIZE, headless=True) as pilot:
+        await pilot.pause(MOUNT_PAUSE)
+
+        # Switch to Stream screen (auto-starts in demo mode)
+        await pilot.press("f7")
+        await pilot.pause(MODE_SWITCH_PAUSE)
+
+        # Wait for PID stats and PSI tree to populate
+        await pilot.pause(2.0)
+
+        svg = app.export_screenshot(title="SkyWalker-1 — Stream")
+        _save(svg, "stream")
+
+
+async def capture_config_screen() -> None:
+    """Capture F8 Config screen."""
+    app = _new_app(show_splash=False)
+
+    async with app.run_test(size=TERM_SIZE, headless=True) as pilot:
+        await pilot.pause(MOUNT_PAUSE)
+
+        # Switch to Config screen
+        await pilot.press("f8")
+        await pilot.pause(MODE_SWITCH_PAUSE)
+
+        # Wait for config status to load
+        await pilot.pause(0.5)
+
+        svg = app.export_screenshot(title="SkyWalker-1 — Config")
+        _save(svg, "config")
+
+
 async def capture_dark_mode() -> None:
     """Capture dark-mode toggle with Star Wars notification toast."""
     app = _new_app(show_splash=False)
@@ -124,6 +179,9 @@ async def main() -> None:
 
     captures = [
         ("Mode screens (F1-F5)", capture_mode_screens),
+        ("Device screen (F6)", capture_device_screen),
+        ("Stream screen (F7)", capture_stream_screen),
+        ("Config screen (F8)", capture_config_screen),
         ("Dark mode toggle", capture_dark_mode),
         ("Splash screen", capture_splash),
         ("Star Wars easter egg", capture_starwars),