Fix AGENTS.md support, changelog viewer, and session model storage

- BREAKING: Renamed AGENT.md to AGENTS.md for project context files
- Added automatic changelog viewer on startup for new sessions
- Added settings manager to track last shown changelog version
- BREAKING: Store provider and modelId separately in session files (fixes #4)
- Fixed markdown list rendering when items contain inline code with cyan formatting
- Added dynamic border component for TUI
- Updated changelog with entries for #4 and #5

packages/ai/src/models.generated.ts

@@ -910,7 +910,7 @@ export const MODELS = {
 			contextWindow: 200000,
 			maxTokens: 100000,
 		} satisfies Model<"openai-responses">,
-		"o1": {
+		o1: {
 			id: "o1",
 			name: "o1",
 			api: "openai-responses",
@@ -978,7 +978,7 @@ export const MODELS = {
 			contextWindow: 128000,
 			maxTokens: 16384,
 		} satisfies Model<"openai-responses">,
-		"o3": {
+		o3: {
 			id: "o3",
 			name: "o3",
 			api: "openai-responses",