G1 step 1: gemini get, and two TLS connections measured

`gemini get <url>` fetches on a short-lived task (a handshake would trip
the main loop's watchdog; an idle client should cost no stack) and
reports the header, size, certificate fingerprint and heap. First page:
geminiprotocol.net, 20 text/gemini, 1,184 bytes in 0.7-1.1 s.

With IRC connected over TLS, a fetch dips to about 24 KB free during its
handshake, about 36-40 KB after it; nothing leaks. Antenna is down, so
the default aggregator becomes Cosmos.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

src/main.cpp

@@ -27,6 +27,7 @@
 #include "services/irc_service.h"
 #include "services/clock_service.h"
 #include "services/debug_console.h"
+#include "services/gemini_service.h"
 #include "services/gnss_service.h"
 #include "services/power_service.h"
 #include "services/storage_service.h"
@@ -54,6 +55,7 @@ static StorageService* storageService;
 static PowerService* power;
 static ClockService* clockService;
 static GnssService* gnssService;
+static GeminiService gemini;
 static SavedNetworks* savedNetworks;
 static WifiService* wifi;
 static IrcService* irc;
@@ -347,6 +349,7 @@ static const char* const kHelp =
     "coredump erase    forget the core dump in flash\n"
     "key <name|char>   press a key: up down left right select back home del tab, or one character\n"
     "wifi status | wifi add <ssid><TAB><password>\n"
+    "gemini get <url>  fetch a Gemini page and report header, size, certificate, heap\n"
     "irc start | irc stop | irc dump | irc say <buffer> <text>\n"
     "ls [folder] | rm <path> | install <path.ota> (Update from SD)\n"
     "sd list | cat <path> | log <text> | burst | sound on|off | short | normal\n"
@@ -462,6 +465,8 @@ static void runCommand(String line) {
         storageService->requestListing();
         listingWanted = true;
     }
+    if (line.startsWith("gemini get "))
+        if (!gemini.fetchToConsole(line.substring(11).c_str())) console.println("gemini: a fetch is already running");
     if (line == "irc start") irc->connect();
     if (line == "irc stop") irc->disconnect();
     if (line.startsWith("irc say ")) {  // irc say <buffer index> <text>