feat: Separate Local and Networked Ollama providers

- Add distinct 'Local Ollama' and 'Networked Ollama' options in dropdown
- Local uses localhost, Networked uses remote endpoints with load balancing
- Color-coded: Yellow for Local, Blue for Networked
- Icons:  Local,  Networked
- Backend supports OLLAMA_LOCAL_URL and OLLAMA_NETWORK_URLS env vars
- Updated installer to generate new env var format
- Legacy 'ollama' provider still works for backward compatibility

scripts/install.ps1

@@ -425,24 +425,24 @@ if (-not (Test-Path $configDir)) {
     New-Item -ItemType Directory -Path $configDir -Force | Out-Null
 }
 
-# Build OLLAMA_ENDPOINTS string
-$ollamaEndpoints = @()
+# Build OLLAMA_LOCAL_URL and OLLAMA_NETWORK_URLS strings
+$ollamaLocalUrl = ""
+$ollamaNetworkUrls = @()
+
 if ($config.local.enabled) {
-    $ollamaEndpoints += $config.local.url
+    $ollamaLocalUrl = $config.local.url
 }
+
 foreach ($ep in $config.networked.endpoints) {
     if ($ep.enabled) {
         if ($ep.prefer_high_speed -and $ep.alt_url) {
-            $ollamaEndpoints += $ep.alt_url
+            $ollamaNetworkUrls += $ep.alt_url
         } else {
-            $ollamaEndpoints += $ep.url
+            $ollamaNetworkUrls += $ep.url
         }
     }
 }
-$ollamaEndpointsStr = $ollamaEndpoints -join ","
-if ([string]::IsNullOrEmpty($ollamaEndpointsStr)) {
-    $ollamaEndpointsStr = "http://localhost:11434"
-}
+$ollamaNetworkUrlsStr = $ollamaNetworkUrls -join ","
 
 # Generate .env file
 Write-Step "Generating .env file..."
@@ -454,8 +454,11 @@ $envLines = @(
     "# Generated by installer on $timestamp",
     "# ======================================================================",
     "",
-    "# Ollama Endpoints (comma-separated for load balancing)",
-    "OLLAMA_ENDPOINTS=$ollamaEndpointsStr",
+    "# Local Ollama (on this machine)",
+    "OLLAMA_LOCAL_URL=$ollamaLocalUrl",
+    "",
+    "# Networked Ollama (comma-separated for load balancing)",
+    "OLLAMA_NETWORK_URLS=$ollamaNetworkUrlsStr",
     "",
     "# Load Balancing Strategy: round-robin, failover, random",
     "LOAD_BALANCE_STRATEGY=$($config.load_balancing)",