docs(tasks): remove completed Task 22 setup flow test issue

Make master_password_hash optional in development config

None default allows env var to override. Hardcoded dev hash removed.

Docs/tasks.md

@@ -1,19 +1,3 @@
-## Task 22: UI Setup Flow - Setup Page Loads
-
-**Suite:** `Robot.Ui.Setup Flow`  
-**Test:** `Setup Page Loads`  
-**Result:** FAIL  
-**Error:** `TimeoutError: locator.waitFor: Timeout 5000ms exceeded. waiting for locator('id=setup-form') to be visible`
-
-**Instructions:**
-- The setup flow tests expect `#setup-form` to be visible, but it is not found.
-- Investigate the setup page frontend code.
-- The app may already be configured, causing the setup page to redirect to the dashboard instead of showing the form.
-- Check if a suite-level setup/teardown resets the app to an unconfigured state before running setup flow tests.
-- Update the test setup in `tests/robot/ui/setup_flow.robot` or the backend to ensure the setup form is available.
-
----
-
 ## Task 23: UI Setup Flow - Password Strength Weak
 
 **Suite:** `Robot.Ui.Setup Flow`  

src/server/config/development.py

@@ -38,12 +38,11 @@ class DevelopmentSettings(BaseSettings):
     )
     """Password salt (non-production value for development)."""
 
-    master_password_hash: str = Field(
+    master_password_hash: Optional[str] = Field(
-        default="$2b$12$wP0KBVbJKVAb8CdSSXw0NeGTKCk"
+        default=None,
-        "bw4fSAFXIqR2/wDqPSEBn9w7lS",
         env="MASTER_PASSWORD_HASH"
     )
-    """Hash of the master password (dev: 'password')."""
+    """Hash of the master password. None means not configured (env var overrides)."""
 
     master_password: str = Field(default="password", env="MASTER_PASSWORD")
     """Master password for development (NEVER use in production)."""