Info screen: full /config + /state dump, replaces identity screen

Previously the 4-line "identity" screen showed only viewport name, mDNS
host, IP, and state. Expanded to 15 lines covering the full GET /config
+ GET /state output (name, host, ip, state, configured, scrypted,
orientation, brightness, idle, fw, uptime, frames, errs, free heap,
free PSRAM), label/value pairs left-aligned with auto-scaled font.

Renames "identity" → "info" throughout — symbol, log messages,
README/TESTING references.

Also:
- Move the info-screen render's big locals (~1.6 KiB: lines[16][80] +
  scrypt[256] + vp_name[64]) to BSS. The touch task's 3 KiB stack
  was overflowing on every long-press, leaving whatever frame was
  previously on the panel — gave the appearance of a "blue screen"
  after the M5 test pattern.
- Drop the ≥5 s touch factory-reset gesture and remove all stale
  references to it in docs and comments. NVS wipe is now a USB-side
  `idf.py erase-flash` operation only.
- M5 follow-up TODO in jpeg_decoder.c: solid green renders ~black and
  solid blue renders green; not a byte-order issue (BGR setting turns
  red into blue). Tracked as a known M5 gap.

1 files changed, 3 insertions, 3 deletions

diff --git a/main/touch.c b/main/touch.c
index b3ba42c..7cde4bf 100644
--- a/main/touch.c
+++ b/main/touch.c
@@ -25,7 +25,7 @@ static const char *TAG = "touch";
 
 #define POLL_PERIOD_MS       30
 #define TAP_MAX_MS           500     // < this on release = short tap (toggle)
-#define LONG_PRESS_MS        1500    // ≥ this while held = identity overlay
+#define LONG_PRESS_MS        1500    // ≥ this while held = info overlay
 #define OVERLAY_MS           15000
 #define TAP_DEBOUNCE_MS      150
 
@@ -50,7 +50,7 @@ static void on_short_tap(void)
 
 static void on_long_press(void)
 {
-    ESP_LOGI(TAG, "long-press → identity overlay for %dms", OVERLAY_MS);
+    ESP_LOGI(TAG, "long-press → info overlay for %dms", OVERLAY_MS);
     if (display_is_up()) local_screens_overlay(OVERLAY_MS);
 }
 
@@ -119,7 +119,7 @@ esp_err_t touch_init(void)
         return err;
     }
     ESP_LOGI(TAG, "FT5426 ack'd (dev_mode=0x%02x); "
-                  "tap=toggle wake/sleep, %dms hold=identity overlay",
+                  "tap=toggle wake/sleep, %dms hold=info overlay",
              dev_mode, LONG_PRESS_MS);
 
     BaseType_t ok = xTaskCreate(touch_task, "touch", 3072, NULL, 4, &s_task);