fix(generate): forward context through chunked large-diff prompt path

When a staged diff exceeds MAX_REQUEST_TOKENS, generateCommitMessageByDiff
routes through getCommitMsgsPromisesFromFileDiffs →
getMessagesPromisesByChangesInFile → generateCommitMessageChatCompletionPrompt
to produce one sub-prompt per chunk. That entire chain was threading
`fullGitMojiSpec` but never `context`, so `-c/--context` was silently
dropped for any diff large enough to trigger chunking, even though
the simple (non-chunked) path forwarded it correctly.

Add a `context` parameter to each of the three helpers and thread it
through to generateCommitMessageChatCompletionPrompt so the user's
context is present in every sub-prompt.

src/generateCommitMessageFromGitDiff.ts

@@ -130,7 +130,7 @@ async function handleModelNotFoundError(
       ...existingConfig,
       OCO_MODEL: newModel
     } as any);
-    console.log(chalk.green('✔') + ' Model saved as default\n');
+    console.log(chalk.green('√') + ' Model saved as default\n');
   }
 
   return newModel;
@@ -168,7 +168,8 @@ export const generateCommitMessageByDiff = async (
       const commitMessagePromises = await getCommitMsgsPromisesFromFileDiffs(
         diff,
         MAX_REQUEST_TOKENS,
-        fullGitMojiSpec
+        fullGitMojiSpec,
+        context
       );
 
       const commitMessages = [] as string[];
@@ -228,7 +229,8 @@ function getMessagesPromisesByChangesInFile(
   fileDiff: string,
   separator: string,
   maxChangeLength: number,
-  fullGitMojiSpec: boolean
+  fullGitMojiSpec: boolean,
+  context: string
 ) {
   const hunkHeaderSeparator = '@@ ';
   const [fileHeader, ...fileDiffByLines] = fileDiff.split(hunkHeaderSeparator);
@@ -256,7 +258,8 @@ function getMessagesPromisesByChangesInFile(
     async (lineDiff) => {
       const messages = await generateCommitMessageChatCompletionPrompt(
         separator + lineDiff,
-        fullGitMojiSpec
+        fullGitMojiSpec,
+        context
       );
 
       return engine.generateCommitMessage(messages);
@@ -305,7 +308,8 @@ function splitDiff(diff: string, maxChangeLength: number) {
 export const getCommitMsgsPromisesFromFileDiffs = async (
   diff: string,
   maxDiffLength: number,
-  fullGitMojiSpec: boolean
+  fullGitMojiSpec: boolean,
+  context: string
 ) => {
   const separator = 'diff --git ';
 
@@ -323,14 +327,16 @@ export const getCommitMsgsPromisesFromFileDiffs = async (
         fileDiff,
         separator,
         maxDiffLength,
-        fullGitMojiSpec
+        fullGitMojiSpec,
+        context
       );
 
       commitMessagePromises.push(...messagesPromises);
     } else {
       const messages = await generateCommitMessageChatCompletionPrompt(
         separator + fileDiff,
-        fullGitMojiSpec
+        fullGitMojiSpec,
+        context
       );
 
       const engine = getEngine();