feat(gui): footer badge "Rust" + one-click run.bat launcher

GUI: Footer.svelte gets a small inline "Rust" pill next to the
copyright line (red bg #b7411a, white 11px, rounded). Now obvious
at-a-glance which fork's UI you're looking at when both python and
rust are open side-by-side. Python edition mirrors with a console
banner.

Launcher: run.bat at the repo root loads dev.env (skipping #-comments
and blank lines), then `start ""` spawns target\release\jarvis-gui.exe.
The new Desktop shortcut "Jarvis (Rust).lnk" points at this batch
file with resources\icons\icon.ico as its icon. WindowStyle=7 means
the cmd host stays minimized — only the GUI window pops up.

If the user hasn't built yet, the bat prints the cargo build command
and pauses instead of silently doing nothing.

frontend/src/components/Footer.svelte

@@ -17,7 +17,10 @@
 </script>
 
 <footer id="footer">
-    <p>© {currentYear} J.A.R.V.I.S.</p>
+    <p>
+        © {currentYear} J.A.R.V.I.S.
+        <span class="edition" title="Rust + Tauri build">Rust</span>
+    </p>
     <p class="links">
         <a href={repoLink} target="_blank" rel="noopener noreferrer">
             <img src="/media/icons/github-logo.png" alt="GitHub" width="18px" />
@@ -46,6 +49,19 @@
         line-height: 1.7em;
         margin-top: 15px;
 
+        .edition {
+            display: inline-block;
+            margin-left: 6px;
+            padding: 1px 7px;
+            border-radius: 4px;
+            background: #b7411a;
+            color: #fff;
+            font-size: 11px;
+            font-weight: 600;
+            letter-spacing: 0.5px;
+            vertical-align: middle;
+        }
+
         p {
             margin: 0;
             padding: 0;

run.bat

@@ -0,0 +1,19 @@
+@echo off
+setlocal enabledelayedexpansion
+cd /d "%~dp0"
+
+if exist dev.env (
+    for /f "usebackq tokens=1,* delims==" %%a in ("dev.env") do (
+        set "_k=%%a"
+        if not "!_k:~0,1!"=="#" if not "!_k!"=="" set "%%a=%%b"
+    )
+)
+
+if exist "target\release\jarvis-gui.exe" (
+    start "" "target\release\jarvis-gui.exe"
+    exit /b 0
+)
+
+echo target\release\jarvis-gui.exe not found.
+echo Build it first:  cargo build --release -p jarvis-gui
+pause