fix: tia

tests/.snapshots/success.txt

@@ -1821,6 +1821,11 @@
   ✓ output format → it returns a 32-character hex xxh128 hash
   ✓ output format → it returns a stable hash for empty content
 
+   PASS  Tests\Unit\Plugins\Tia\Graph
+  ✓ markKnownTestFiles() → it makes a test file with no edges known
+  ✓ markKnownTestFiles() → it does not clobber edges of an already-known test file
+  ✓ markKnownTestFiles() → it ignores paths outside the project root
+
    PASS  Tests\Unit\Plugins\Tia\IsEnabledForRun
   ✓ does not throw when an integer --random-order-seed is passed as a separate argv element
   ✓ still detects --tia when an integer argument is present
@@ -1836,6 +1841,14 @@
   ✓ it detects an added or removed non-platform dependency
   ✓ it is independent of package ordering
 
+   PASS  Tests\Unit\Plugins\Tia\TestPaths
+  ✓ isTestFile() → it matches a standard test file under a configured directory
+  ✓ isTestFile() → it does not match a non-test file that shares the directory
+  ✓ isTestFile() → it does not match files outside the configured directories
+  ✓ isTestFile() → it matches an explicitly listed file
+  ✓ isTestFile() → it honours a bare .php suffix
+  ✓ isTestFile() → it does not require a dot before the suffix
+
    PASS  Tests\Unit\Plugins\Tia\ViteDepsHelper
   ✓ it strips JSONC down to something JSON.parse accepts with ('plain-object')
   ✓ it strips JSONC down to something JSON.parse accepts with ('plain-array')
@@ -2084,4 +2097,4 @@
   ✓ pass with dataset with ('my-datas-set-value')
   ✓ within describe → pass with dataset with ('my-datas-set-value')
 
-  Tests:    1 deprecated, 4 warnings, 5 incomplete, 2 notices, 40 todos, 35 skipped, 1462 passed (3220 assertions)
+  Tests:    1 deprecated, 4 warnings, 5 incomplete, 2 notices, 40 todos, 35 skipped, 1471 passed (3232 assertions)