refactor(action-context): remove unused fragment aggregator + building block

actionFragmentContext was built spec-driven in step 1 to handle the
anticipated drawer-fragment pattern: authorize + finder → status DTO.
The action-context rollout (steps 2-11) found that none of the three
real drawer fragments (users/view-fragment, addressbook/view-fragment,
helpdesk/ticket-fragment) match that pattern — all three delegate to
domain services that own their own status models. Step 11 declared
them structural exceptions; the helper code remained unused.

This commit removes the dead spec:
* core/Support/helpers/action_context.php drops actionFragmentContext
  (~9 LOC) and its building block actionFragmentResolveOrStatus
  (~30 LOC) plus their docblocks. The MUST-call-actionRequireCsrf
  warning, present in three aggregator docblocks before, now appears
  twice (one per remaining aggregator).
* tests/Support/Helpers/ActionContextHelperTest.php drops the six
  unit tests that exercised these functions (~83 LOC).
* tests/Architecture/ActionContextHelperContractTest.php drops the
  fragment building block from the buildingBlocks() data provider
  (5 entries instead of 6) and removes testFragmentResolveReturnDocblockIsFrozen.
  The CSRF-warning expectation is updated from 3 to 2 with a code
  comment explaining the rollback.

Verified:
* No production caller exists in pages/ or modules/.
* All 9 aggregator callers (5 actionEditContext + 4 actionCreateContext)
  remain unchanged.
* ActionContextCsrfPairingContractTest and DetailDrawerFragmentContractTest
  are deliberately left untouched: their allowlists/recognizer regexes
  still mention actionFragmentContext, but the patterns now match an
  empty set — harmless dead text. Documented as open items in the run
  report; future cleanup is optional and orthogonal to this removal.
* QGs all green (PHPUnit 2088 tests, PHPStan level 5, CS-fixer 0 diffs).

Net: 3 files, +31/-198 LOC, behavior unchanged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/Architecture/ActionContextHelperContractTest.php

@@ -7,22 +7,27 @@ use ReflectionFunction;
 use ReflectionNamedType;
 
 /**
- * Freezes the API of the 6 orthogonal building blocks in
+ * Freezes the API of the 5 orthogonal building blocks in
  * core/Support/helpers/action_context.php.
  *
- * Aggregators (actionEditContext, actionCreateContext, actionFragmentContext)
- * are intentionally NOT frozen — they may evolve additively in Step 2 of the
- * rollout.
+ * Aggregators (actionEditContext, actionCreateContext) are intentionally NOT
+ * frozen — they may evolve additively across the rollout.
  *
- * This test also asserts that the Tenant-Scope and Fragment-Resolver helpers
- * carry their PHPStan array-shape return docblocks. Acceptance check SC-004
- * relies on the shape staying stable.
+ * This test also asserts that the Tenant-Scope helper carries its PHPStan
+ * array-shape return docblock. Acceptance check SC-004 relies on the shape
+ * staying stable.
  *
  * Step 2 (Pilot-Migration Departments-Edit, Run
  * 2026-04-25-action-context-rollout-step2-departments) is the first
  * production caller. The previous testNoProductionCallSitesYet assertion
  * has been removed; the CSRF↔Aggregator pairing is enforced by
  * tests/Architecture/ActionContextCsrfPairingContractTest.php instead.
+ *
+ * Run 2026-04-25-action-fragment-context-removal pruned the dead
+ * Cluster-10 Drawer-Fragment helpers (actionFragmentResolveOrStatus building
+ * block + actionFragmentContext aggregator) after Step 11 declared all three
+ * fragment actions structural exceptions that delegate to domain-services
+ * with their own status models.
  */
 class ActionContextHelperContractTest extends TestCase
 {
@@ -60,12 +65,6 @@ class ActionContextHelperContractTest extends TestCase
                 ['capabilities', null, false],
                 ['whitelistedFlags', null, false],
             ]],
-            ['actionFragmentResolveOrStatus', [
-                ['finder', null, false],
-                ['rawId', null, false],
-                ['abilityKey', null, false],
-                ['context', null, false],
-            ]],
         ];
     }
 
@@ -132,18 +131,6 @@ class ActionContextHelperContractTest extends TestCase
         );
     }
 
-    public function testFragmentResolveReturnDocblockIsFrozen(): void
-    {
-        $reflection = new ReflectionFunction('actionFragmentResolveOrStatus');
-        $doc = (string) $reflection->getDocComment();
-
-        $this->assertMatchesRegularExpression(
-            "/@return array\{status:[^}]*'ok'[^}]*'forbidden'[^}]*'not_found'[^}]*'invalid_id'/",
-            $doc,
-            "actionFragmentResolveOrStatus must declare PHPStan array-shape return covering all 4 status values."
-        );
-    }
-
     public function testEnforceCanViewPageDocblockHasStrictComparisonNote(): void
     {
         $reflection = new ReflectionFunction('actionEnforceCanViewPage');
@@ -181,19 +168,25 @@ class ActionContextHelperContractTest extends TestCase
             '/MUST call actionRequireCsrf\(\) BEFORE this aggregator/',
             $contents
         );
+        // Expected count is 2: actionEditContext + actionCreateContext.
+        // Run 2026-04-25-action-fragment-context-removal removed the
+        // actionFragmentContext aggregator (Cluster 10 has no aggregator —
+        // drawer-fragments use domain-service status models instead), reducing
+        // the warning count from 3 to 2.
         $this->assertSame(
-            3,
+            2,
             $count,
-            'Each of the 3 aggregators (actionEditContext, actionCreateContext, actionFragmentContext) must carry the explicit CSRF-warning in its docblock (GR-SEC-001).'
+            'Each of the 2 aggregators (actionEditContext, actionCreateContext) must carry the explicit CSRF-warning in its docblock (GR-SEC-001).'
         );
     }
 
     public function testAggregatorsExistButAreNotFrozen(): void
     {
-        // We assert existence only — signatures may evolve in Step 2.
+        // We assert existence only — signatures may evolve.
+        // Run 2026-04-25-action-fragment-context-removal removed
+        // actionFragmentContext; only EditContext and CreateContext remain.
         $this->assertTrue(function_exists('actionEditContext'));
         $this->assertTrue(function_exists('actionCreateContext'));
-        $this->assertTrue(function_exists('actionFragmentContext'));
     }
 
     /**