feat(phase-4): visual polish — font stack, shadow system, transitions, micro-interactions

Phase 4: Visual Polish

4.1 Font Stack Upgrade:
- Add --font-display token for headings
- Replace all hardcoded font-family: monospace with var(--font-mono)
- Replace hardcoded 'Segoe UI' stack with var(--font-body)

4.2 Shadow Elevation System:
- Add --shadow-2xl, --shadow-card/dropdown/modal/toast/header/dark-lg tokens
- Replace hardcoded shadows in header, menu, banner, shared, recipe-modal,
  progress-panel, import-modal, alphabet-bar with semantic tokens
- Add dark theme shadow overrides with increased opacity

4.3 Transitions & Micro-interactions:
- Replace transition: all with specified properties (performance)
- Use --transition-fast/base/slow tokens instead of hardcoded 0.2s/0.3s
- Add :active scale feedback to modal buttons
- Enhance card hover with box-shadow + border-color lift

4.4 Dark Theme Refinement:
- Elevated shadow opacity for dark theme visibility

4.5 Density:
- Standardize container padding with --space-2 token

21 files changed

static/css/components/lora-modal/description.css

@@ -62,7 +62,7 @@
 }
 
 .model-description-content code {
-  font-family: monospace;
+  font-family: var(--font-mono);
   font-size: 0.9em;
   background: rgba(0, 0, 0, 0.05);
   padding: 0.1em 0.3em;

static/css/components/lora-modal/lora-modal.css

@@ -203,7 +203,7 @@
 }
 
 .file-path {
-    font-family: monospace;
+    font-family: var(--font-mono);
     font-size: 0.9em;
 }
 
@@ -291,7 +291,7 @@
     opacity: 0;
     visibility: hidden;
     transform: translateY(10px);
-    transition: all 0.3s ease;
+    transition: opacity var(--transition-slow), visibility var(--transition-slow), transform var(--transition-slow);
     z-index: 10;
 }
 
@@ -347,7 +347,7 @@
     cursor: pointer;
     padding: 2px 5px;
     border-radius: var(--border-radius-xs);
-    transition: all 0.2s ease;
+    transition: opacity var(--transition-base), background-color var(--transition-base);
     margin-left: var(--space-1);
 }
 
@@ -430,7 +430,7 @@
 }
 
 .size-wrapper span {
-    font-family: monospace;
+    font-family: var(--font-mono);
     font-size: 0.9em;
     opacity: 0.9;
 }

static/css/components/lora-modal/showcase.css

@@ -297,7 +297,7 @@
 
 .metadata-prompt {
   color: var(--text-color);
-  font-family: monospace;
+  font-family: var(--font-mono);
   font-size: 0.85em;
   white-space: pre-wrap;
 }