feat: add OpenRouter support and fix input disabling

- Add OpenRouter provider support with @openrouter/ai-sdk-provider
- Fix input not disabling during 'submitted' state for fast providers
- Apply disable logic to all interactive elements (textarea, buttons, handlers)
- Clean up env.example by removing model examples and separator blocks
- Upgrade zod to v4.1.12 for compatibility with ollama-ai-provider-v2
- Add debug logging for status changes in chat components

package-lock.json

@@ -14,6 +14,7 @@
                 "@ai-sdk/google": "^2.0.0",
                 "@ai-sdk/openai": "^2.0.19",
                 "@ai-sdk/react": "^2.0.22",
+                "@openrouter/ai-sdk-provider": "^1.2.3",
                 "@radix-ui/react-dialog": "^1.1.6",
                 "@radix-ui/react-scroll-area": "^1.2.3",
                 "@radix-ui/react-slot": "^1.1.2",
@@ -1113,6 +1114,47 @@
                 "node": ">= 10"
             }
         },
+        "node_modules/@openrouter/ai-sdk-provider": {
+            "version": "1.2.3",
+            "resolved": "https://registry.npmjs.org/@openrouter/ai-sdk-provider/-/ai-sdk-provider-1.2.3.tgz",
+            "integrity": "sha512-a6Nc8dPRHakRH9966YJ/HZJhLOds7DuPTscNZDoAr+Aw+tEFUlacSJMvb/b3gukn74mgbuaJRji9YOn62ipfVg==",
+            "license": "Apache-2.0",
+            "dependencies": {
+                "@openrouter/sdk": "^0.1.8"
+            },
+            "engines": {
+                "node": ">=18"
+            },
+            "peerDependencies": {
+                "ai": "^5.0.0",
+                "zod": "^3.24.1 || ^v4"
+            }
+        },
+        "node_modules/@openrouter/sdk": {
+            "version": "0.1.11",
+            "resolved": "https://registry.npmjs.org/@openrouter/sdk/-/sdk-0.1.11.tgz",
+            "integrity": "sha512-OuPc8qqidL/PUM8+9WgrOfSR9+b6rKIWiezGcUJ54iPTdh+Gye5Qjut6hrLWlOCMZE7Z853gN90r1ft4iChj7Q==",
+            "license": "Apache-2.0",
+            "dependencies": {
+                "zod": "^3.25.0 || ^4.0.0"
+            },
+            "peerDependencies": {
+                "@tanstack/react-query": "^5",
+                "react": "^18 || ^19",
+                "react-dom": "^18 || ^19"
+            },
+            "peerDependenciesMeta": {
+                "@tanstack/react-query": {
+                    "optional": true
+                },
+                "react": {
+                    "optional": true
+                },
+                "react-dom": {
+                    "optional": true
+                }
+            }
+        },
         "node_modules/@opentelemetry/api": {
             "version": "1.9.0",
             "resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.9.0.tgz",