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/app_main.c b/main/app_main.c
index 2cb395e..44e2052 100644
--- a/main/app_main.c
+++ b/main/app_main.c
@@ -72,9 +72,9 @@ void app_main(void)
     // config is even slightly off; keeping that off the main task means
     // a misconfigured panel can't take down networking + /state. The
     // task also brings up the JPEG decoder and touch (touch shares the
-    // panel I²C bus and also handles long-press → identity overlay and
-    // very-long-press → factory reset, since the board's BOOT button is
-    // wired to a strap pin (GPIO35) that the EMAC owns at runtime).
+    // panel I²C bus and also handles long-press → info overlay, since
+    // the board's BOOT button is wired to a strap pin (GPIO35) that the
+    // EMAC owns at runtime).
     // ------------------------------------------------------------------
     ESP_LOGI(TAG, "boot complete — net subsystems [%s] ip=%s; "
                   "display init deferred to dsp_init task",