feat: enforce hard test-tier requirement across all DevPlace workflow agents and feature-builder docs

Update the feature-builder agent prompt, test-maintainer agent, and all four workflow JS files (devii-tool, endpoint, feature, job-service) to codify the DevPlace test standard as a non-optional project requirement: one test file per endpoint, directory tree mirroring the URL/source path, split into three tiers (unit, api, e2e). Add explicit Test phases to devii-tool, endpoint, feature, and job-service workflows, and embed tier-specific test instructions (path mapping, fixture choice, coverage scope) directly in each workflow's meta description and TESTS constant.

devplacepy/static/css/messages.css

@@ -5,6 +5,7 @@
     min-height: 0;
     display: flex;
     width: 100%;
+    --kb-inset: 0px;
 }
 
 .messages-layout {
@@ -292,11 +293,16 @@
 
 .messages-input-area {
     padding: 0.75rem 1rem;
+    padding-bottom: calc(0.75rem + var(--kb-inset) + env(safe-area-inset-bottom));
+    padding-left: calc(1rem + env(safe-area-inset-left));
+    padding-right: calc(1rem + env(safe-area-inset-right));
     border-top: 1px solid var(--border);
     display: flex;
     align-items: center;
     gap: 0.5rem;
     flex-shrink: 0;
+    min-height: 56px;
+    background: var(--bg-card);
 }
 
 .messages-input-area input[type="text"] {
@@ -403,13 +409,23 @@
     .messages-layout {
         grid-template-columns: 1fr;
         min-height: 0;
+        height: 100%;
+        border-radius: 0;
+        border-left: none;
+        border-right: none;
     }
     .messages-list {
         display: flex;
+        min-height: 0;
+        height: 100%;
     }
     .messages-list.hide {
         display: none;
     }
+    .messages-main {
+        min-height: 0;
+        height: 100%;
+    }
     .messages-main.hide {
         display: none;
     }
@@ -418,6 +434,9 @@
         align-items: center;
         justify-content: center;
     }
+    .messages-input-area input[type="text"] {
+        font-size: 16px;
+    }
 }
 
 @media (max-width: 360px) {
@@ -427,6 +446,9 @@
 
     .messages-input-area {
         padding: 0.5rem 0.75rem;
+        padding-bottom: calc(0.5rem + var(--kb-inset) + env(safe-area-inset-bottom));
+        padding-left: calc(0.75rem + env(safe-area-inset-left));
+        padding-right: calc(0.75rem + env(safe-area-inset-right));
     }
 
     .message-bubble {