Fix hardcoded credentials in tests

[michaelstingl]

Fix hardcoded credentials in tests

Problem

CodeQL security scanning identified hardcoded credentials in test files, which could potentially lead to security vulnerabilities if real tokens were accidentally committed.

Solution

• Replace all instances of hardcoded mock-token with EXAMPLE_TEST_TOKEN
• This makes it clear that these are example values for testing purposes only
• The token values are only used in test files, not production code

Changes

• Updated 3 instances of token values in ApiService-test.ts
• Added clearer comments to indicate test-only credentials

Security Impact

This change addresses 2 open CodeQL security warnings about hardcoded credentials in test files.

[github-actions]

Coverage after merging fix/hardcoded-test-credentials-clean into main will be

63.03%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
config
app.config.ts	70%	50%	100%	100%	101, 133, 133–134, 134, 85–86, 97, 99
services
AuthService.ts	44.02%	36.67%	57.14%	46.48%	109–115, 126–127, 190, 208, 219, 227, 229–231, 234–238, 241, 241, 241, 241, 241, 241–242, 246–247, 254, 254, 254–256, 259, 261, 267, 270, 273, 276, 283, 286, 289, 292, 295, 295, 295–297, 301–303, 306, 309, 309, 309–310, 312–313, 313, 313, 316, 316, 316, 318, 318, 318–322, 322, 322–325, 325, 325–328, 331, 336, 336, 336, 338–339, 341, 341, 341, 341, 341, 343, 343, 343–344, 348, 350, 350, 350, 350, 350, 352–353, 357–358, 362–363, 57–60, 71
OidcService.ts	48.21%	36.59%	60%	54.55%	130–133, 138, 138, 15, 155–156, 176, 176, 176–177, 181, 181, 181–183, 186, 186, 186–188, 190, 190–191, 191, 195, 200, 200, 200–201, 205, 205, 205–206, 209, 211, 211, 211, 213–214, 214, 220, 24–25, 34–35, 53–54, 57, 66, 84–87
WebFingerService.ts	89.33%	76.92%	80%	97.73%	104–105, 14, 24, 31, 38, 59
services/api
ApiService.ts	75.58%	63.64%	70%	81.48%	100, 133, 137, 172, 174, 200, 200, 200–202, 204, 204, 209, 212–213, 227, 86, 93
HttpUtil.ts	59.24%	50.54%	84.62%	62.88%	102–103, 103, 103, 106, 106, 106–107, 110, 114, 114, 114–117, 155, 165, 18, 193, 198, 198–199, 203, 222, 305, 31, 312, 34–35, 354, 354, 354–355, 355, 355, 357, 357, 357–359, 36, 362, 362, 362–363, 365, 365, 365–367, 369, 369, 369–370, 373, 39, 396, 410, 42–43, 435–438, 446, 450, 473–475, 51, 59, 59, 59–60, 60, 60–62, 62, 62–63, 63, 63, 65–67, 69, 71, 75, 79, 82, 85, 92, 96, 96