feat(download): add Linux beta support

- Change Linux from "coming soon" to "beta" status
- Enable download button for Linux users (.deb package)
- Add beta warning with links to GitHub issues and Discord
- Update InstallModal to allow Linux users to install apps
- Update GettingStarted page to reflect Linux beta availability

src/components/InstallModal.jsx

@@ -16,7 +16,6 @@ import VerifiedIcon from '@mui/icons-material/Verified';
 import DownloadIcon from '@mui/icons-material/Download';
 import OpenInNewIcon from '@mui/icons-material/OpenInNew';
 import ComputerIcon from '@mui/icons-material/Computer';
-import BlockIcon from '@mui/icons-material/Block';
 
 function InstallModal({ open, onClose, app }) {
   // Detect Linux users
@@ -196,59 +195,8 @@ function InstallModal({ open, onClose, app }) {
 
         {/* Desktop App Requirement Block */}
         <Box sx={{ p: 3 }}>
-          {isLinux ? (
-            // Linux: Not supported message
-            <Box
-              sx={{
-                display: 'flex',
-                alignItems: 'flex-start',
-                gap: 2,
-                p: 2.5,
-                borderRadius: '14px',
-                bgcolor: 'rgba(0, 0, 0, 0.03)',
-                border: '1px solid rgba(0, 0, 0, 0.08)',
-              }}
-            >
-              <Box
-                sx={{
-                  width: 44,
-                  height: 44,
-                  borderRadius: '12px',
-                  bgcolor: 'rgba(0, 0, 0, 0.05)',
-                  display: 'flex',
-                  alignItems: 'center',
-                  justifyContent: 'center',
-                  flexShrink: 0,
-                }}
-              >
-                <BlockIcon sx={{ fontSize: 24, color: '#999' }} />
-              </Box>
-              <Box sx={{ flex: 1 }}>
-                <Typography
-                  sx={{
-                    fontSize: 14,
-                    fontWeight: 700,
-                    color: '#1a1a1a',
-                    mb: 0.75,
-                  }}
-                >
-                  Linux not supported yet
-                </Typography>
-                <Typography
-                  sx={{
-                    fontSize: 13,
-                    color: '#666',
-                    lineHeight: 1.6,
-                  }}
-                >
-                  The desktop app is currently available for <strong>macOS</strong> and <strong>Windows</strong> only.
-                  Linux support is coming soon!
-                </Typography>
-              </Box>
-            </Box>
-          ) : (
-            // macOS/Windows: Normal install flow
-            <Box
+          {/* All platforms: Normal install flow */}
+          <Box
               sx={{
                 display: 'flex',
                 alignItems: 'flex-start',
@@ -319,6 +267,37 @@ function InstallModal({ open, onClose, app }) {
                 </Link>
               </Box>
             </Box>
+          
+          {/* Linux Beta Notice */}
+          {isLinux && (
+            <Box
+              sx={{
+                mt: 2,
+                p: 1.5,
+                borderRadius: '10px',
+                bgcolor: 'rgba(59, 130, 246, 0.08)',
+                border: '1px solid rgba(59, 130, 246, 0.2)',
+              }}
+            >
+              <Typography
+                sx={{
+                  fontSize: 12,
+                  color: '#3b82f6',
+                  fontWeight: 500,
+                  textAlign: 'center',
+                  '& a': {
+                    color: '#3b82f6',
+                    textDecoration: 'underline',
+                    fontWeight: 600,
+                  },
+                }}
+              >
+                Linux support is currently in Beta — please report any issues on{' '}
+                <a href="https://github.com/pollen-robotics/reachy-mini-desktop-app/issues" target="_blank" rel="noopener noreferrer">GitHub</a>
+                {' '}or{' '}
+                <a href="https://discord.gg/HDrGY9eJHt" target="_blank" rel="noopener noreferrer">Discord</a>.
+              </Typography>
+            </Box>
           )}
         </Box>
 
@@ -331,7 +310,7 @@ function InstallModal({ open, onClose, app }) {
             rel="noopener noreferrer"
             variant="outlined"
             sx={{
-              flex: isLinux ? 1 : 1,
+              flex: 1,
               py: 1.5,
               borderRadius: '12px',
               borderColor: '#ddd',
@@ -348,29 +327,27 @@ function InstallModal({ open, onClose, app }) {
             <OpenInNewIcon sx={{ fontSize: 16 }} />
           </Button>
           
-          {!isLinux && (
-            <Button
-              variant="contained"
-              onClick={handleInstall}
-              startIcon={<DownloadIcon sx={{ fontSize: 20 }} />}
-              sx={{
-                flex: 1.5,
-                py: 1.5,
-                borderRadius: '12px',
-                bgcolor: '#FF9500',
-                fontWeight: 600,
-                fontSize: 14,
-                textTransform: 'none',
-                boxShadow: 'none',
-                '&:hover': {
-                  bgcolor: '#e68600',
-                  boxShadow: '0 4px 12px rgba(255, 149, 0, 0.35)',
-                },
-              }}
-            >
-              Install
-            </Button>
-          )}
+          <Button
+            variant="contained"
+            onClick={handleInstall}
+            startIcon={<DownloadIcon sx={{ fontSize: 20 }} />}
+            sx={{
+              flex: 1.5,
+              py: 1.5,
+              borderRadius: '12px',
+              bgcolor: '#FF9500',
+              fontWeight: 600,
+              fontSize: 14,
+              textTransform: 'none',
+              boxShadow: 'none',
+              '&:hover': {
+                bgcolor: '#e68600',
+                boxShadow: '0 4px 12px rgba(255, 149, 0, 0.35)',
+              },
+            }}
+          >
+            Install
+          </Button>
         </Box>
       </DialogContent>
     </Dialog>

src/pages/Download.jsx

@@ -219,8 +219,8 @@ function getDownloadUrlForPlatform(release, platform) {
 // Platform Card component
 function PlatformCard({ platformKey, url, isActive, onClick }) {
   const platform = PLATFORMS[platformKey];
-  const isComingSoon = platformKey.includes('darwin-x86_64') || platformKey.includes('linux');
-  const isBeta = platformKey.includes('windows');
+  const isComingSoon = platformKey.includes('darwin-x86_64');
+  const isBeta = platformKey.includes('windows') || platformKey.includes('linux');
 
   return (
     <Card
@@ -556,8 +556,8 @@ export default function Download() {
               </Typography>
             </Stack>
 
-            {/* Primary download button - different for Windows/macOS Apple Silicon vs macOS Intel/Linux */}
-            {detectedPlatform?.startsWith('windows') || detectedPlatform === 'darwin-aarch64' ? (
+            {/* Primary download button - different for Windows/macOS Apple Silicon/Linux vs macOS Intel */}
+            {detectedPlatform?.startsWith('windows') || detectedPlatform === 'darwin-aarch64' || detectedPlatform?.includes('linux') ? (
               <>
                 <Button
                   variant="contained"
@@ -593,8 +593,8 @@ export default function Download() {
                   {currentPlatform?.subtitle} • {currentPlatform?.format?.replace('.', '').toUpperCase()} package
                 </Typography>
 
-                {/* Windows Beta Warning */}
-                {detectedPlatform?.startsWith('windows') && (
+                {/* Beta Warning for Windows and Linux */}
+                {(detectedPlatform?.startsWith('windows') || detectedPlatform?.includes('linux')) && (
                   <Box
                     sx={{
                       mt: 3,
@@ -613,14 +613,17 @@ export default function Download() {
                         fontWeight: 500,
                       }}
                     >
-                      ⚠️ Windows version is currently in Beta — installation requires <strong style={{ color: 'rgba(255,255,255,0.9)' }}>administrator privileges</strong>.
+                      {detectedPlatform?.startsWith('windows') 
+                        ? <>⚠️ Windows version is currently in Beta — installation requires <strong style={{ color: 'rgba(255,255,255,0.9)' }}>administrator privileges</strong>.</>
+                        : <>⚠️ Linux version is currently in Beta — please report any issues on <a href="https://github.com/pollen-robotics/reachy-mini-desktop-app/issues" target="_blank" rel="noopener noreferrer" style={{ color: '#3b82f6', textDecoration: 'underline' }}>GitHub</a> or <a href="https://discord.gg/HDrGY9eJHt" target="_blank" rel="noopener noreferrer" style={{ color: '#3b82f6', textDecoration: 'underline' }}>Discord</a>.</>
+                      }
                     </Typography>
                   </Box>
                 )}
               </>
             ) : (
               <>
-                {/* macOS Intel/Linux - Coming soon message */}
+                {/* macOS Intel - Coming soon message */}
                 <Box
                   sx={{
                     px: 5,
@@ -654,7 +657,7 @@ export default function Download() {
                   }}
                 >
                   We're working hard to bring Reachy Mini Control to {currentPlatform?.name}. 
-                  In the meantime, macOS (Apple Silicon) is fully supported and Windows is in beta!
+                  In the meantime, macOS (Apple Silicon) is fully supported, and Windows & Linux are in beta!
                 </Typography>
 
                 {/* Alternative for Linux/advanced users - Python SDK */}
@@ -762,8 +765,8 @@ export default function Download() {
               ))}
             </Grid>
             
-            {/* Platform support notice - show on Windows and macOS Apple Silicon */}
-            {(detectedPlatform?.startsWith('windows') || detectedPlatform === 'darwin-aarch64') && (
+            {/* Platform support notice - show on Windows, macOS Apple Silicon, and Linux */}
+            {(detectedPlatform?.startsWith('windows') || detectedPlatform === 'darwin-aarch64' || detectedPlatform?.includes('linux')) && (
               <Box
                 sx={{
                   mt: 3,
@@ -778,7 +781,7 @@ export default function Download() {
                   variant="body2" 
                   sx={{ color: 'rgba(255,255,255,0.5)' }}
                 >
-                  🚧 macOS Intel & Linux support coming soon
+                  🚧 macOS Intel support coming soon
                 </Typography>
               </Box>
             )}

src/pages/GettingStarted.jsx

@@ -326,7 +326,7 @@ export default function GettingStarted() {
                           The desktop app includes everything you need to control your Lite version.
                         </Typography>
                         <Typography variant="caption" sx={{ display: 'block', mb: 2, color: 'warning.main' }}>
-                          Desktop App currently available for Windows only. macOS & Linux coming soon!
+                          Desktop App available for macOS (Apple Silicon), Windows & Linux (beta). macOS Intel coming soon!
                         </Typography>
                         <Button
                           variant="contained"
@@ -334,7 +334,7 @@ export default function GettingStarted() {
                           to="/download"
                           startIcon={<DownloadIcon/>}
                         >
-                          Download Windows APP
+                          Download Desktop App
                         </Button>
 
                         <Button
@@ -343,7 +343,7 @@ export default function GettingStarted() {
                           target="_blank"
                           startIcon={<OpenInNewIcon/>}
                         >
-                          macOS/Linux Installation
+                          Alternative: Python SDK
                         </Button>
                         
                       </StepContent>