FreeTRX: on-screen rename, credits, and README supported-radios note

- Splash screen and Firmware Info name now show "FreeTRX".
- Firmware-info credits: "Marcus DK1DA", a separator, and a thank-you to the
  original OpenGD77 authors.
- README documents that this iteration is developed/tested only on the TYT
  MD-UV380 and Retevis RT-3S, with a contact for testing other supported radios.
- CHANGELOG updated.

Hardware/tooling identifiers (build filename, MD-UV380 model IDs, hotspot
version string) intentionally left unchanged to avoid breaking flashing and
Pi-Star/MMDVM compatibility.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -54,6 +54,11 @@ single running list until the first versioned release.
   documenting the fork and its upstream source; original OpenGD77 README kept as
   `README.OpenGD77.md`. Added `LICENSE.md` reproducing the inherited OpenGD77
   license (modified BSD 3-Clause + non-commercial clause; not GPL-compatible).
+- On-screen branding renamed to **FreeTRX** (splash screen + Firmware Info name).
+- README notes this iteration is developed/tested only on the **TYT MD-UV380 and
+  Retevis RT-3S**, with a contact for testing on other supported radios.
+- Firmware-info **credits** simplified to "Marcus DK1DA" and a reference to
+  "The original OpenGD77 authors".
 
 ### Misc
 

MDUV380_firmware/application/source/user_interface/menuFirmwareInfoScreen.c

@@ -46,14 +46,14 @@ enum
 
 static const char *creditTexts[] =
 {
-		"Roger VK3KYY", "Daniel F1RMB", "Kai DG4KLU", "Colin G4EML", "Alex DL4LEX",
-#if defined(PLATFORM_RD5R)
-		"Dzmitry EW1ADG",
-#endif
-		"Jason VK7ZJA (SK)",
+		"Marcus DK1DA",
 		"",
-		"Modified Fork by",
-		"Marcus DK1DA"
+		"----------------",
+		"",
+		"Thanks to the",
+		"original OpenGD77",
+		"authors for",
+		"their great work",
 };
 static const int maxCredits = (sizeof(creditTexts) / sizeof(creditTexts[0]));
 static const int maxCreditsPages = (maxCredits / maxDisplayedCreditsLines) + ((maxCredits % maxDisplayedCreditsLines) == 0 ? 0 : 1);
@@ -163,7 +163,7 @@ static void displayBuildDetails(bool playVP)
 {
 #if !defined(PLATFORM_GD77S)
 	char versionBuf[SCREEN_LINE_BUFFER_SIZE];
-	const char *radioModel = currentLanguage->openGD77;
+	const char *radioModel = "FreeTRX"; // firmware name shown in Firmware Info
 	char dateTimeBuf[SCREEN_LINE_BUFFER_SIZE];
 
 	displayClearBuf();
@@ -219,7 +219,7 @@ static void displayBuildDetails(bool playVP)
 	{
 		voicePromptsInit();
 		voicePromptsAppendPrompt(PROMPT_SILENCE);
-		voicePromptsAppendLanguageString(radioModel);
+		voicePromptsAppendString(radioModel); // "FreeTRX" is a literal, not a language string
 		voicePromptsAppendLanguageString(currentLanguage->built);
 		voicePromptsAppendString(dateTimeBuf);
 		voicePromptsAppendLanguageString(currentLanguage->gitCommit);

MDUV380_firmware/application/source/user_interface/uiSplashScreen.c

@@ -155,7 +155,7 @@ static void updateScreen(bool isFirstRun)
 	{
 		displayClearBuf();
 
-		displayPrintCentered(8, "OpenGD77", FONT_SIZE_3);
+		displayPrintCentered(8, "FreeTRX", FONT_SIZE_3);
 		displayPrintCentered((DISPLAY_SIZE_Y / 4) * 2, line1, FONT_SIZE_3);
 		displayPrintCentered((DISPLAY_SIZE_Y / 4) * 3, line2, FONT_SIZE_3);
 	}

README.md

@@ -9,6 +9,15 @@ It adds a number of UI and quality-of-life changes on top of OpenGD77 (segmented
 S-meter, 7-segment frequency font, screen dimming, an audio-mute function, menu
 icons, and more). See [`CHANGELOG.md`](CHANGELOG.md) for the full list.
 
+## Supported radios
+
+This first iteration is developed for and **tested only on the TYT MD-UV380 and
+Retevis RT-3S**. No other radios are officially supported at this time.
+
+If you have another radio that OpenGD77 supports (Baofeng DM-1701 / Retevis RT-84,
+MD-9600, MD-380, MD-2017, …) and would like to help test FreeTRX on it, that would
+be very welcome — please email **Marcus, DK1DA** at <marcus.kida@bearologics.com>.
+
 ## Upstream source
 
 This fork is based on the official OpenGD77 source release **R20260131**