feat: unify Claude API key and profile system with flexible key sourcing

- Add ApiKeySource type ('inline' | 'env' | 'credentials') to ClaudeApiProfile
- Allow profiles to source API keys from credentials.json or environment variables
- Add provider templates: OpenRouter, MiniMax, MiniMax (China)
- Auto-migrate existing users with Anthropic key to "Direct Anthropic" profile
- Update all API call sites to pass credentials for key resolution
- Add API key source selector to profile creation UI
- Increment settings version to 5 for migration support

This allows users to:
- Share a single API key across multiple profile configurations
- Use environment variables for CI/CD deployments
- Easily switch between providers without re-entering keys

package-lock.json

@@ -6190,6 +6190,7 @@
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       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.7.tgz",
       "integrity": "sha512-MWtvHrGZLFttgeEj28VXHxpmwYbor/ATPYbBfSFZEIRK0ecCFLl2Qo55z52Hss+UV9CRN7trSeq1zbgx7YDWWg==",
+      "dev": true,
       "license": "MIT",
       "dependencies": {
         "csstype": "^3.2.2"
@@ -6199,7 +6200,7 @@
       "version": "19.2.3",
       "resolved": "https://registry.npmjs.org/@types/react-dom/-/react-dom-19.2.3.tgz",
       "integrity": "sha512-jp2L/eY6fn+KgVVQAOqYItbF0VY/YApe5Mz2F0aykSO8gx31bYCZyvSeYxCHKvzHG5eZjc+zyaS5BrBWya2+kQ==",
-      "devOptional": true,
+      "dev": true,
       "license": "MIT",
       "peerDependencies": {
         "@types/react": "^19.2.0"
@@ -8410,6 +8411,7 @@
       "version": "3.2.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.2.3.tgz",
       "integrity": "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ==",
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/d3-color": {
@@ -11303,7 +11305,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">= 12.0.0"
       },
@@ -11367,7 +11368,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">= 12.0.0"
       },