feat: switch default branding to the modern Stirling logo (#7485)

# Description of Changes

logo changes!

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have run `task check` to verify linters, typechecks, and tests
pass
- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#7-testing)
for more details.

frontend/editor/public/safari-pinned-tab.svg

@@ -1 +1,4 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="933.333" height="933.333" preserveAspectRatio="xMidYMid meet" version="1.0" viewBox="0 0 700 700"><metadata>Created by potrace 1.14, written by Peter Selinger 2001-2017</metadata><g fill="#000" stroke="none"><path d="M4340 6716 c-228 -51 -910 -202 -1515 -336 -1479 -326 -1522 -335 -1587 -360 -155 -58 -315 -206 -391 -363 -83 -170 -77 40 -77 -2484 0 -1985 2 -2256 15 -2307 53 -204 228 -378 431 -430 32 -8 464 -67 959 -132 l900 -117 659 664 c362 365 1074 1083 1581 1595 l923 931 -4 84 c-2 46 -9 622 -14 1279 -6 657 -15 1219 -21 1249 -29 169 -167 304 -337 331 -74 12 -116 6 -397 -55 -112 -25 -208 -45 -214 -45 -7 0 -11 33 -11 98 0 54 -5 125 -11 158 -24 129 -106 237 -225 295 -59 29 -78 33 -158 35 -83 3 -128 -6 -506 -90z m-741 -1297 c108 -15 244 -53 336 -91 l80 -34 -4 -314 c-2 -173 -7 -450 -10 -615 l-6 -300 -61 -3 -61 -3 -74 88 c-298 355 -496 483 -747 483 -74 0 -202 -32 -257 -65 -106 -61 -177 -184 -178 -305 0 -82 15 -135 56 -197 62 -92 157 -138 437 -209 393 -99 639 -221 826 -408 136 -137 206 -259 255 -442 30 -113 37 -363 15 -494 -85 -488 -398 -821 -866 -921 -87 -19 -136 -23 -285 -23 -165 0 -193 3 -335 33 -280 59 -585 154 -746 231 l-80 39 -12 373 c-7 205 -15 437 -19 516 l-6 142 51 0 c32 0 52 -4 52 -11 0 -24 99 -176 172 -264 125 -151 278 -272 455 -359 147 -73 181 -81 328 -81 127 0 132 1 202 34 137 64 236 205 236 337 0 131 -96 257 -262 343 -45 23 -180 75 -300 116 -333 112 -496 191 -646 312 -321 260 -442 767 -290 1219 110 330 325 579 633 733 144 73 364 127 613 151 113 10 395 5 498 -11z" transform="translate(0.000000,700.000000) scale(0.100000,-0.100000)"/></g></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" width="512" height="512">
+  <path d="M79 256L309 66V242L79 432V256Z" fill="#000000"/>
+  <path d="M202 268L432 78V255L202 445V268Z" fill="#000000" fill-opacity="0.55"/>
+</svg>

frontend/editor/src/proprietary/components/shared/config/configSections/AdminGeneralSection.tsx

@@ -370,11 +370,11 @@ export default function AdminGeneralSection() {
   // Show the server setting when loaded (for admin config), otherwise show user's preference
   // Note: User's preference in localStorage is separate and takes precedence in the app via useLogoVariant hook
   const logoStyleValue = loginEnabled
-    ? (settings.ui?.logoStyle ?? preferences.logoVariant ?? "classic")
-    : (preferences.logoVariant ?? "classic");
+    ? (settings.ui?.logoStyle ?? preferences.logoVariant ?? "modern")
+    : (preferences.logoVariant ?? "modern");
 
   const handleLogoStyleChange = (value: string) => {
-    const nextValue = value === "modern" ? "modern" : "classic";
+    const nextValue = value === "classic" ? "classic" : "modern";
 
     // Only update local settings state - don't update the actual preference until save
     // When login is disabled, update preference immediately since there's no server to save to