feat: Integrate PR #3 fixes and add bulk update state name fix

[SvenMeyer]

This PR integrates the changes from jgadbois's Pull Request #3 (#3) into the main branch.

PR #3 includes:

• Fix for Personal Access Token (PAT) authentication.
• Ability to search issues by full identifier (e.g., TEAM-123).
• Attempted fix for bulk issue updates using state names.
• Code structure for OAuth flow (untested).

This PR also includes an additional commit that fixes a bug in PR #3's implementation of bulk updates using state names (resolving team.states.find is not a function).

This effectively replaces the previous main branch history with the more comprehensive fixes and features from PR #3, plus the necessary correction.

[ocasta181]

Hey @SvenMeyer

Apologies for the delay in responding here.

Had you tried running the automated tests? This appears to break a few:

andrin@Andrins-MacBook-Pro linear-mcp % npm test

> linear-mcp@1.0.0 test
> jest

 PASS  src/__tests__/auth.integration.test.ts
 PASS  src/__tests__/auth.test.ts
 FAIL  src/__tests__/graphql-client.test.ts
  ● Console

    console.error
      Failed to update issue issue-1

      135 |         } else {
      136 |           overallSuccess = false;
    > 137 |           console.error(`Failed to update issue ${id}`);
          |                   ^
      138 |         }
      139 |       } catch (error) {
      140 |         overallSuccess = false;

      at LinearGraphQLClient.updateIssues (src/graphql/client.ts:137:19)
      at Object.<anonymous> (src/__tests__/graphql-client.test.ts:434:44)

    console.error
      Error updating issue issue-2: Error: GraphQL operation failed: Cannot read properties of undefined (reading 'data')
          at LinearGraphQLClient.execute (/Users/andrin/Code/linear-mcp/src/graphql/client.ts:50:15)
          at processTicksAndRejections (node:internal/process/task_queues:105:5)
          at LinearGraphQLClient.updateIssues (/Users/andrin/Code/linear-mcp/src/graphql/client.ts:129:24)
          at Object.<anonymous> (/Users/andrin/Code/linear-mcp/src/__tests__/graphql-client.test.ts:434:44)

      139 |       } catch (error) {
      140 |         overallSuccess = false;
    > 141 |         console.error(`Error updating issue ${id}:`, error);
          |                 ^
      142 |       }
      143 |     }
      144 |

      at LinearGraphQLClient.updateIssues (src/graphql/client.ts:141:17)
      at Object.<anonymous> (src/__tests__/graphql-client.test.ts:434:44)

    console.error
      Error updating issue issue-1: Error: GraphQL operation failed: Update failed
          at LinearGraphQLClient.execute (/Users/andrin/Code/linear-mcp/src/graphql/client.ts:50:15)
          at processTicksAndRejections (node:internal/process/task_queues:105:5)
          at LinearGraphQLClient.updateIssues (/Users/andrin/Code/linear-mcp/src/graphql/client.ts:129:24)
          at Object.<anonymous> (/Users/andrin/Code/linear-mcp/src/__tests__/graphql-client.test.ts:452:7)

      139 |       } catch (error) {
      140 |         overallSuccess = false;
    > 141 |         console.error(`Error updating issue ${id}:`, error);
          |                 ^
      142 |       }
      143 |     }
      144 |

      at LinearGraphQLClient.updateIssues (src/graphql/client.ts:141:17)
      at Object.<anonymous> (src/__tests__/graphql-client.test.ts:452:7)

  ● LinearGraphQLClient › Bulk Operations › should update multiple issues with a single mutation

    expect(received).toEqual(expected) // deep equality

    - Expected  - 15
    + Received  +  2

      Object {
        "issueUpdate": Object {
    -     "issues": Array [
    -       Object {
    -         "id": "issue-1",
    -         "identifier": "TEST-1",
    -         "title": "Updated Issue 1",
    -         "url": "https://linear.app/test/issue/TEST-1",
    -       },
    -       Object {
    -         "id": "issue-2",
    -         "identifier": "TEST-2",
    -         "title": "Updated Issue 2",
    -         "url": "https://linear.app/test/issue/TEST-2",
    -       },
    -     ],
    -     "success": true,
    +     "issues": Array [],
    +     "success": false,
        },
      }

      434 |       const result: UpdateIssuesResponse = await graphqlClient.updateIssues(ids, updateInput);
      435 |
    > 436 |       expect(result).toEqual(mockResponse.data);
          |                      ^
      437 |       // Verify single mutation call
      438 |       expect(mockRawRequest).toHaveBeenCalledTimes(1);
      439 |       expect(mockRawRequest).toHaveBeenCalledWith(

      at Object.<anonymous> (src/__tests__/graphql-client.test.ts:436:22)

  ● LinearGraphQLClient › Bulk Operations › should handle update errors

    expect(received).rejects.toThrow()

    Received promise resolved instead of rejected
    Resolved to value: {"issueUpdate": {"issues": [], "success": false}}

      450 |
      451 |       const updateInput: UpdateIssueInput = { stateId: 'state-2' };
    > 452 |       await expect(
          |                   ^
      453 |         graphqlClient.updateIssues(['issue-1'], updateInput)
      454 |       ).rejects.toThrow('GraphQL operation failed: Update failed');
      455 |     });

      at expect (node_modules/expect/build/index.js:113:15)
      at Object.<anonymous> (src/__tests__/graphql-client.test.ts:452:19)

Test Suites: 1 failed, 2 passed, 3 total
Tests:       2 failed, 3 skipped, 33 passed, 38 total
Snapshots:   0 total
Time:        1.49 s
Ran all test suites.

When run from main I get:

andrin@Andrins-MacBook-Pro linear-mcp % npm test                

> linear-mcp@1.0.0 test
> jest

 PASS  src/__tests__/auth.integration.test.ts
 PASS  src/__tests__/auth.test.ts
 PASS  src/__tests__/graphql-client.test.ts

Test Suites: 3 passed, 3 total
Tests:       3 skipped, 35 passed, 38 total
Snapshots:   0 total
Time:        1.348 s, estimated 2 s
Ran all test suites.