Refactor LSP tools and add hover functionality

- Split diagnostics tool into separate lsp-diagnostics.ts file
- Add new lsp-hover.ts tool for LSP hover information
- Update tool exports and session integration
- Remove old diagnostics.ts file

🤖 Generated with opencode
Co-Authored-By: opencode <noreply@opencode.ai>

js/src/lsp/client.ts

@@ -144,7 +144,7 @@ export namespace LSPClient {
               textDocument: {
                 uri: `file://` + input.path,
                 languageId,
-                version: ++version,
+                version: Date.now(),
                 text,
               },
             });
@@ -157,7 +157,7 @@ export namespace LSPClient {
           await connection.sendNotification("textDocument/didChange", {
             textDocument: {
               uri: `file://` + input.path,
-              version: ++version,
+              version: Date.now(),
             },
             contentChanges: [
               {
@@ -181,7 +181,7 @@ export namespace LSPClient {
                 event.properties.path === input.path &&
                 event.properties.serverID === result.clientID
               ) {
-                log.info("refreshed diagnostics", input);
+                log.info("got diagnostics", input);
                 clearTimeout(timeout);
                 unsub?.();
                 resolve();
@@ -190,6 +190,7 @@ export namespace LSPClient {
           }),
           new Promise<void>((resolve) => {
             timeout = setTimeout(() => {
+              log.info("timed out refreshing diagnostics", input);
               unsub?.();
               resolve();
             }, 5000);

js/src/lsp/index.ts

@@ -54,6 +54,24 @@ export namespace LSP {
     return results;
   }
 
+  export async function hover(input: {
+    file: string;
+    line: number;
+    character: number;
+  }) {
+    return run((client) => {
+      return client.connection.sendRequest("textDocument/hover", {
+        textDocument: {
+          uri: `file://${input.file}`,
+        },
+        position: {
+          line: input.line,
+          character: input.character,
+        },
+      });
+    });
+  }
+
   async function run<T>(
     input: (client: LSPClient.Info) => Promise<T>,
   ): Promise<T[]> {