fix: don't early-return on 'allow' in executePreToolUseHooks

When multiple hook sources are merged (global ~/.claude/settings.json +
project .claude/settings.json), a global catch-all hook returning 'allow'
caused early return before project-level hooks could execute.

Only 'deny' and 'ask' decisions should short-circuit. 'allow' should
continue processing remaining hooks so project-specific guards (e.g.,
file budget enforcement) get a chance to block.

src/hooks/claude-code-hooks/pre-tool-use.ts

@@ -143,9 +143,9 @@ export async function executePreToolUseHooks(
             output.suppressOutput !== undefined || 
             output.systemMessage !== undefined
 
-          if (decision || hasCommonFields) {
+          if (decision === "deny" || decision === "ask") {
             return {
-              decision: decision ?? "allow",
+              decision,
               reason,
               modifiedInput,
               elapsedMs: Date.now() - startTime,
@@ -158,6 +158,11 @@ export async function executePreToolUseHooks(
               systemMessage: output.systemMessage,
             }
           }
+
+          // "allow" — apply modifiedInput but continue processing remaining hooks
+          if (modifiedInput) {
+            Object.assign(stdinData.tool_input, objectToSnakeCase(modifiedInput))
+          }
         } catch {
         }
       }