Default name = MAC; brief wake on boot; drop dead touch defences

- Seed viewport_name with the full base MAC, colons stripped
  (e8:f6:0a:e0:90:94 → "e8f60ae09094"). Stable across reboots, globally
  unique, 12 alphanumeric chars — well inside the mDNS hostname limit
  even with the "viewport-" prefix.
- Add a mac_str field to viewport_state and expose it as the new "mac"
  key in GET /state and as a "mac" line on the info screen.
- "Configured" no longer requires a viewport_name (it always has the
  MAC default); the scrypted URL alone gates outbound POSTs and the
  loading-vs-info screen choice.
- Strip viewport_name[0] fallbacks in http_api / mdns / local_screens
  now that the field is never empty.
- Replace the wake-on-boot-stays-on behaviour with a ~600 ms flash
  followed by sleep — long enough for the FT5426 touch IC to come out
  of its initial unresponsive state, short enough that an idle device
  doesn't burn the backlight.
- Drop the touch defensive cruft added when we were chasing a PoE-power
  theory: the DEV_MODE=0x00 write at init, the touch_reset_pulse() call
  at init, and the runtime wedge-self-heal in the polling loop didn't
  actually fix anything — the wake-on-boot flash did. Also delete the
  display_touch_reset_pulse() helper since it now has zero callers.

1 files changed, 0 insertions, 5 deletions

diff --git a/main/display.h b/main/display.h
index cb2b913..9092efb 100644
--- a/main/display.h
+++ b/main/display.h
@@ -27,11 +27,6 @@ esp_err_t display_set_brightness(uint8_t brightness_0_100);
 esp_err_t display_sleep(void);
 esp_err_t display_wake(void);
 
-// Pulse the touch IC's reset line (PC_RST_TP_N) via the panel MCU. Used
-// by touch_init() when the FT5426 boots into a wedged state and refuses
-// to leave dev_mode=0xff.
-esp_err_t display_touch_reset_pulse(void);
-
 // Blit an RGB565 source image to the panel, applying the current
 // orientation. Source dimensions must match the effective resolution:
 //   portrait  -> src is 480x800 (rotated 90° CW into the 800x480 panel)