feat: Server Color Coding System (#103)

* feat: implement server color coding feature

- Add color column to servers table with migration
- Add SERVER_COLOR_CODING_ENABLED environment variable
- Create API route for color coding toggle settings
- Add color field to Server and CreateServerData types
- Update database CRUD operations to handle color field
- Update server API routes to handle color field
- Create colorUtils.ts with contrast calculation function
- Add color coding toggle to GeneralSettingsModal
- Add color picker to ServerForm component (only shown when enabled)
- Apply colors to InstalledScriptsTab (borders and server column)
- Apply colors to ScriptInstallationCard component
- Apply colors to ServerList component
- Fix 'Local' display issue in installed scripts table

* fix: resolve TypeScript errors in color coding implementation

- Fix unsafe argument type errors in GeneralSettingsModal and ServerForm
- Remove unused import in ServerList component

* feat: add color-coded dropdown for server selection

- Create ColorCodedDropdown component with server color indicators
- Replace HTML select with custom dropdown in ExecutionModeModal
- Add color dots next to server names in dropdown options
- Maintain all existing functionality with improved visual design

* fix: generate new execution ID for each script run

- Change executionId from useState to allow updates
- Generate new execution ID in startScript function for each run
- Fixes issue where scripts couldn't be run multiple times without page reload
- Resolves 'Script execution already running' error on subsequent runs

* fix: improve whiptail handling and execution ID generation

- Remove premature terminal clearing for whiptail sessions
- Let whiptail handle its own display without interference
- Generate new execution ID for both initial and manual script runs
- Fix whiptail session state management
- Should resolve blank screen and script restart issues

* fix: revert problematic whiptail changes that broke terminal display

- Remove complex whiptail session handling that caused blank screen
- Simplify output handling to just write data directly to terminal
- Keep execution ID generation fix for multiple script runs
- Remove unused inWhiptailSession state variable
- Terminal should now display output normally again

* fix: remove remaining inWhiptailSession reference

- Remove inWhiptailSession from useEffect dependency array
- Fixes ReferenceError: inWhiptailSession is not defined
- Terminal should now work without JavaScript errors

* debug: add console logging to terminal message handling

- Add debug logs to see what messages are being received
- Help diagnose why terminal shows blank screen
- Will remove debug logs once issue is identified

* fix: prevent WebSocket reconnection loop

- Remove executionId from useEffect dependency arrays
- Fixes terminal constantly reconnecting and showing blank screen
- WebSocket now maintains stable connection during script execution
- Removes debug console logs

* fix: prevent WebSocket reconnection on second script run

- Remove handleMessage from useEffect dependency array
- Fixes loop of START messages and connection blinking on subsequent runs
- WebSocket connection now stable for multiple script executions
- handleMessage recreation no longer triggers WebSocket reconnection

* debug: add logging to identify WebSocket reconnection cause

- Add console logs to useEffect and startScript
- Track what dependencies are changing
- Identify why WebSocket reconnects on second run

* fix: remove isRunning from WebSocket useEffect dependencies

- isRunning state change was causing WebSocket reconnection loop
- Each script start changed isRunning from false to true
- This triggered useEffect to reconnect WebSocket
- Removing isRunning from dependencies breaks the loop
- WebSocket connection now stable during script execution

* feat: preselect SSH mode in execution modal and clean up debug logs

- Preselect SSH execution mode by default since it's the only available option
- Remove debug console logs from Terminal component
- Clean up code for production readiness

* fix: resolve build errors and warnings

- Add missing SettingsModal import to ExecutionModeModal
- Remove unused selectedMode and handleModeChange variables
- Add ESLint disable comments for intentional useEffect dependency exclusions
- Build now passes successfully with no errors or warnings

src/app/_components/ScriptInstallationCard.tsx

@@ -2,6 +2,7 @@
 
 import { Button } from './ui/button';
 import { StatusBadge } from './Badge';
+import { getContrastColor } from '../../lib/colorUtils';
 
 interface InstalledScript {
   id: number;
@@ -13,6 +14,7 @@ interface InstalledScript {
   server_ip: string | null;
   server_user: string | null;
   server_password: string | null;
+  server_color: string | null;
   installation_date: string;
   status: 'in_progress' | 'success' | 'failed';
   output_log: string | null;
@@ -50,7 +52,10 @@ export function ScriptInstallationCard({
   };
 
   return (
-    <div className="bg-card border border-border rounded-lg p-4 shadow-sm hover:shadow-md transition-shadow">
+    <div 
+      className="bg-card border border-border rounded-lg p-4 shadow-sm hover:shadow-md transition-shadow"
+      style={{ borderLeft: `4px solid ${script.server_color ?? 'transparent'}` }}
+    >
       {/* Header with Script Name and Status */}
       <div className="flex items-start justify-between mb-3">
         <div className="flex-1 min-w-0">
@@ -102,9 +107,15 @@ export function ScriptInstallationCard({
         {/* Server */}
         <div>
           <div className="text-xs font-medium text-muted-foreground mb-1">Server</div>
-          <div className="text-sm text-muted-foreground">
-            {script.server_name ?? 'Local'}
-          </div>
+          <span 
+            className="text-sm px-3 py-1 rounded inline-block"
+            style={{
+              backgroundColor: script.server_color ?? 'transparent',
+              color: script.server_color ? getContrastColor(script.server_color) : 'inherit'
+            }}
+          >
+            {script.server_name ?? '-'}
+          </span>
         </div>
 
         {/* Installation Date */}