feat(v3): redesign project workspace layout + emoji icons

- ProjectBox: CSS grid layout (header|session|terminal zones)
- AgentPane: bottom-anchored prompt, full-width form
- Icons: emoji replacing Nerd Font codepoints (cross-platform)
- SettingsTab: emoji picker grid (24 icons, 8-column popup)
- CSS: px to rem conversions across ProjectGrid, TerminalTabs, ProjectBox

v2/src/lib/components/Agent/AgentPane.svelte

@@ -553,18 +553,17 @@
 
   .prompt-area {
     display: flex;
-    align-items: center;
+    flex-direction: column;
-    justify-content: center;
+    justify-content: flex-end;
     height: 100%;
-    padding: 24px;
+    padding: 1rem;
   }
 
   .prompt-form {
     display: flex;
     flex-direction: column;
-    gap: 8px;
+    gap: 0.5rem;
     width: 100%;
-    max-width: 600px;
   }
 
   .prompt-input {
@@ -942,8 +941,7 @@
   /* Session toolbar */
   .session-toolbar {
     width: 100%;
-    max-width: 600px;
+    margin-bottom: 0.5rem;
-    margin-bottom: 8px;
   }
 
   .toolbar-row {

v2/src/lib/components/Workspace/ProjectBox.svelte

@@ -45,13 +45,13 @@
 
 <style>
   .project-box {
-    display: flex;
+    display: grid;
-    flex-direction: column;
+    grid-template-rows: auto 1fr auto;
-    min-width: 480px;
+    min-width: 30rem;
     scroll-snap-align: start;
     background: var(--ctp-base);
     border: 1px solid var(--ctp-surface0);
-    border-radius: 6px;
+    border-radius: 0.375rem;
     overflow: hidden;
     transition: border-color 0.15s;
   }
@@ -61,17 +61,15 @@
   }
 
   .project-session-area {
-    flex: 1;
+    display: flex;
-    min-height: 200px;
     overflow: hidden;
     position: relative;
-    display: flex;
+    min-height: 0;
   }
 
   .project-terminal-area {
-    flex-shrink: 0;
+    height: 16rem;
-    min-height: 120px;
+    min-height: 8rem;
     border-top: 1px solid var(--ctp-surface0);
   }
-
 </style>

v2/src/lib/components/Workspace/ProjectGrid.svelte

@@ -57,16 +57,16 @@
 <style>
   .project-grid {
     display: flex;
-    gap: 4px;
+    gap: 0.25rem;
     height: 100%;
     overflow-x: auto;
     scroll-snap-type: x mandatory;
-    padding: 4px;
+    padding: 0.25rem;
   }
 
   .project-slot {
-    flex: 0 0 calc((100% - (var(--visible-count) - 1) * 4px) / var(--visible-count));
+    flex: 0 0 calc((100% - (var(--visible-count) - 1) * 0.25rem) / var(--visible-count));
-    min-width: 480px;
+    min-width: 30rem;
     display: flex;
   }
 

v2/src/lib/components/Workspace/ProjectHeader.svelte

@@ -20,7 +20,7 @@
   style="--accent: var({accentVar})"
   {onclick}
 >
-  <span class="project-icon">{project.icon || '\uf120'}</span>
+  <span class="project-icon">{project.icon || '📁'}</span>
   <span class="project-name">{project.name}</span>
   <span class="project-id">({project.identifier})</span>
 </button>
@@ -29,9 +29,8 @@
   .project-header {
     display: flex;
     align-items: center;
-    gap: 6px;
+    gap: 0.375rem;
-    padding: 4px 10px;
+    padding: 0.375rem 0.625rem;
-    height: 28px;
     background: var(--ctp-mantle);
     border: none;
     border-bottom: 2px solid transparent;
@@ -54,9 +53,9 @@
   }
 
   .project-icon {
-    font-family: 'NerdFontsSymbols Nerd Font', 'Symbols Nerd Font Mono', monospace;
+    font-size: 0.85rem;
-    font-size: 0.9rem;
+    line-height: 1;
-    color: var(--accent);
+    flex-shrink: 0;
   }
 
   .project-name {

v2/src/lib/components/Workspace/SettingsTab.svelte

@@ -18,6 +18,12 @@
   import { THEME_LIST, getPalette, type ThemeId } from '../../styles/themes';
   import { invoke } from '@tauri-apps/api/core';
 
+  const PROJECT_ICONS = [
+    '📁', '🚀', '🤖', '🌐', '🔧', '🎮', '📱', '💻',
+    '🔬', '📊', '🎨', '🔒', '💬', '📦', '⚡', '🧪',
+    '🏗️', '📝', '🎯', '💡', '🔥', '🛠️', '🧩', '🗄️',
+  ];
+
   let activeGroupId = $derived(getActiveGroupId());
   let activeGroup = $derived(getActiveGroup());
   let activeProjectId = $derived(getActiveProjectId());
@@ -194,7 +200,7 @@
       name: newName.trim(),
       identifier: deriveIdentifier(newName.trim()),
       description: '',
-      icon: '\uf120',
+      icon: '📁',
       cwd: newCwd.trim(),
       profile: 'default',
       enabled: true,
@@ -455,14 +461,29 @@
               </button>
             </div>
           </label>
-          <label class="project-field">
+          <div class="project-field icon-field">
             <span class="field-label">Icon</span>
-            <input
+            <button
-              value={project.icon}
+              class="icon-trigger"
-              onchange={e => updateProject(activeGroupId, project.id, { icon: (e.target as HTMLInputElement).value })}
+              onclick={(e) => {
-              style="width: 60px"
+                const btn = e.currentTarget as HTMLElement;
-            />
+                const popup = btn.nextElementSibling as HTMLElement;
-          </label>
+                popup.classList.toggle('visible');
+              }}
+            >{project.icon || '📁'}</button>
+            <div class="icon-picker">
+              {#each PROJECT_ICONS as emoji}
+                <button
+                  class="icon-option"
+                  class:active={project.icon === emoji}
+                  onclick={(e) => {
+                    updateProject(activeGroupId, project.id, { icon: emoji });
+                    ((e.currentTarget as HTMLElement).closest('.icon-picker') as HTMLElement).classList.remove('visible');
+                  }}
+                >{emoji}</button>
+              {/each}
+            </div>
+          </div>
           <label class="project-field">
             <span class="field-label">Enabled</span>
             <input
@@ -806,6 +827,71 @@
     width: 100%;
   }
 
+  .icon-field {
+    position: relative;
+  }
+
+  .icon-trigger {
+    width: 2rem;
+    height: 2rem;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background: var(--ctp-base);
+    border: 1px solid var(--ctp-surface1);
+    border-radius: 3px;
+    font-size: 1rem;
+    cursor: pointer;
+    transition: border-color 0.15s;
+  }
+
+  .icon-trigger:hover {
+    border-color: var(--ctp-overlay0);
+  }
+
+  .icon-picker {
+    display: none;
+    position: absolute;
+    top: 100%;
+    left: 0;
+    z-index: 20;
+    background: var(--ctp-mantle);
+    border: 1px solid var(--ctp-surface1);
+    border-radius: 0.375rem;
+    padding: 0.375rem;
+    grid-template-columns: repeat(8, 1fr);
+    gap: 2px;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
+    width: max-content;
+  }
+
+  .icon-picker.visible {
+    display: grid;
+  }
+
+  .icon-option {
+    width: 1.75rem;
+    height: 1.75rem;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background: transparent;
+    border: 1px solid transparent;
+    border-radius: 3px;
+    font-size: 0.9rem;
+    cursor: pointer;
+    transition: background 0.1s;
+  }
+
+  .icon-option:hover {
+    background: var(--ctp-surface0);
+  }
+
+  .icon-option.active {
+    background: var(--ctp-surface1);
+    border-color: var(--ctp-blue);
+  }
+
   .add-form {
     display: flex;
     gap: 8px;

v2/src/lib/components/Workspace/TerminalTabs.svelte

@@ -103,8 +103,7 @@
     display: flex;
     align-items: center;
     gap: 1px;
-    height: 26px;
+    padding: 0 0.25rem;
-    padding: 0 4px;
     background: var(--ctp-mantle);
     border-bottom: 1px solid var(--ctp-surface0);
     overflow-x: auto;
@@ -114,14 +113,14 @@
   .tab {
     display: flex;
     align-items: center;
-    gap: 4px;
+    gap: 0.25rem;
-    padding: 2px 8px;
+    padding: 0.25rem 0.5rem;
     background: transparent;
     border: none;
     color: var(--ctp-overlay1);
     font-size: 0.72rem;
     cursor: pointer;
-    border-radius: 3px 3px 0 0;
+    border-radius: 0.1875rem 0.1875rem 0 0;
     white-space: nowrap;
     transition: color 0.1s, background 0.1s;
   }
@@ -137,13 +136,8 @@
     border-bottom: 1px solid var(--ctp-blue);
   }
 
-  .tab-icon {
-    font-family: 'NerdFontsSymbols Nerd Font', 'Symbols Nerd Font Mono', monospace;
-    font-size: 0.75rem;
-  }
-
   .tab-title {
-    max-width: 100px;
+    max-width: 6.25rem;
     overflow: hidden;
     text-overflow: ellipsis;
   }
@@ -154,7 +148,7 @@
     color: var(--ctp-overlay0);
     font-size: 0.8rem;
     cursor: pointer;
-    padding: 0 2px;
+    padding: 0 0.125rem;
     line-height: 1;
   }
 
@@ -168,8 +162,8 @@
     color: var(--ctp-overlay0);
     font-size: 0.85rem;
     cursor: pointer;
-    padding: 2px 6px;
+    padding: 0.125rem 0.375rem;
-    border-radius: 3px;
+    border-radius: 0.1875rem;
   }
 
   .tab-add:hover {
@@ -201,13 +195,14 @@
   }
 
   .add-first {
-    padding: 6px 16px;
+    padding: 0.375rem 1rem;
     background: var(--ctp-surface0);
     border: 1px solid var(--ctp-surface1);
-    border-radius: 4px;
+    border-radius: 0.25rem;
     color: var(--ctp-subtext0);
     font-size: 0.8rem;
     cursor: pointer;
+    transition: background 0.15s, color 0.15s;
   }
 
   .add-first:hover {