fix: token persistence, context windows, CSS tables/bullets/hr, image attachments

- Fix token count reset on app restart: persist realTokens in conversation.json
- Fix token/context window values: Studio 150K (summarize at 120K), Terminal 100K
- Fix table rendering in terminal tab: correct thead/tbody display model
- Fix copy button always top-right in Studio code blocks
- Add markdown horizontal rule (---) support in Studio and Terminal
- Fix bullet list double dot: remove CSS ::before duplicate bullet point
- Add image attachments support (VLM description, file mentions @file.ext)
- Add sudo detection with cache (sync.Once)
- Fix message content serialization (TextContent wrapper)
- Guide AI to use read_file instead of cat in studio prompt

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

web/src/styles/global.css

@@ -459,7 +459,7 @@ input::placeholder { color: var(--text-disabled); }
 .ai-panel-messages { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
 .ai-message { padding: 8px 12px; border-radius: var(--radius); font-size: 13px; line-height: 1.5; word-break: break-word; }
 .ai-message.user { background: var(--bg-elevated); border-left: 3px solid var(--accent-bright); color: var(--text-primary); }
-.ai-message.user.analysis { border-left-color: var(--info); background: color-mix(in srgb, var(--info) 8%, var(--bg-elevated)); }
+.ai-message.user.analysis { border-left-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--bg-elevated)); }
 .ai-message.assistant { background: var(--bg-card); border-left: 3px solid var(--accent); }
 .ai-message.system { background: var(--bg-elevated); border-left: 3px solid var(--info); font-style: italic; color: var(--text-tertiary); font-size: 12px; }
 .ai-message.assistant { background: var(--bg-card); border-left: 3px solid var(--accent); }
@@ -469,6 +469,13 @@ input::placeholder { color: var(--text-disabled); }
 .ai-message.tool .tool-args { font-family: var(--font-mono); font-size: 12px; color: var(--text-tertiary); margin-top: 4px; }
 .ai-panel-input { display: flex; gap: 6px; padding: 10px 12px; border-top: 1px solid var(--border); }
 .ai-panel-input input { flex: 1; font-size: 13px; padding: 6px 10px; }
+.ai-panel-input .ai-clear-btn {
+  flex: 1; display: flex; align-items: center; justify-content: center; gap: 8px;
+  padding: 10px 16px; border-radius: var(--radius); border: 1px solid var(--accent);
+  background: var(--accent-bg); color: var(--accent); font-size: 13px; font-weight: 700;
+  cursor: pointer; transition: all 0.15s; font-family: var(--font-sans);
+}
+.ai-panel-input .ai-clear-btn:hover { background: var(--accent); color: #fff; }
 
 .shell-code-block {
   background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
@@ -501,9 +508,11 @@ input::placeholder { color: var(--text-disabled); }
 .shell-mermaid-loading { padding: 16px; text-align: center; color: var(--text-tertiary); font-size: 12px; }
 .shell-mermaid-error { padding: 10px 12px; color: var(--accent-bright); font-family: var(--font-mono); font-size: 12px; white-space: pre-wrap; }
 
-.ai-message table { width: 100%; border-collapse: collapse; margin: 6px 0; font-size: 12px; }
-.ai-message th { background: var(--bg-surface); padding: 6px 10px; text-align: left; font-weight: 600; border: 1px solid var(--border); color: var(--text-secondary); }
-.ai-message td { padding: 5px 10px; border: 1px solid var(--border); color: var(--text-primary); }
+.ai-message table { width: 100%; border-collapse: collapse; margin: 6px 0; font-size: 12px; display: block; overflow-x: auto; }
+.ai-message thead, .ai-message tbody { display: table-row-group; }
+.ai-message th { background: var(--bg-surface); padding: 4px 8px; text-align: left; font-weight: 600; border: 1px solid var(--border); color: var(--text-secondary); white-space: nowrap; }
+.ai-message td { padding: 3px 8px; border: 1px solid var(--border); color: var(--text-primary); white-space: nowrap; }
+.ai-message tr { display: table-row; }
 .ai-message tr:nth-child(even) td { background: var(--bg-surface); }
 
 @keyframes copy-flash {
@@ -526,6 +535,18 @@ input::placeholder { color: var(--text-disabled); }
   flex: 1; overflow-y: auto; padding: 20px; font-size: 14px; line-height: 1.5;
   color: var(--text-primary); word-break: break-word;
 }
+.shell-analysis-modal-body table { width: 100%; border-collapse: collapse; margin: 8px 0; font-size: 13px; }
+.shell-analysis-modal-body th { background: var(--bg-surface); padding: 4px 10px; text-align: left; font-weight: 600; border: 1px solid var(--border); color: var(--text-secondary); }
+.shell-analysis-modal-body td { padding: 3px 10px; border: 1px solid var(--border); color: var(--text-primary); }
+.shell-analysis-modal-body tr:nth-child(even) td { background: var(--bg-surface); }
+.shell-analysis-modal-body .msg-h3 { font-size: 18px; font-weight: 700; color: var(--text-primary); margin: 16px 0 6px; display: block; }
+.shell-analysis-modal-body .msg-h4 { font-size: 15px; font-weight: 700; color: var(--text-secondary); margin: 12px 0 4px; display: block; }
+.shell-analysis-modal-body .msg-h2 { font-size: 20px; font-weight: 700; color: var(--accent); margin: 20px 0 8px; display: block; }
+.shell-analysis-modal-body .msg-bullet { display: block; padding-left: 4px; margin: 2px 0; color: var(--text-primary); }
+.shell-analysis-modal-body .msg-step { display: flex; gap: 8px; align-items: baseline; margin: 2px 0; }
+.shell-analysis-modal-body .msg-step-num { color: var(--accent); font-weight: 700; font-family: var(--font-mono); flex-shrink: 0; }
+.shell-analysis-modal-body strong { color: var(--accent-light); }
+.shell-analysis-modal-body .inline-code { background: var(--bg-input); padding: 2px 6px; border-radius: 4px; font-family: var(--font-mono); font-size: 13px; color: var(--accent-muted); }
 
 .shell-modal-overlay {
   position: fixed; inset: 0; background: rgba(0,0,0,0.6);
@@ -972,7 +993,7 @@ input::placeholder { color: var(--text-disabled); }
   overflow: hidden; margin: 8px 0;
 }
 .studio-code-header {
-  display: flex; align-items: center; justify-content: space-between;
+  display: flex; align-items: center; justify-content: flex-end;
   background: var(--bg-surface); border-bottom: 1px solid var(--border);
 }
 .studio-code-block pre { padding: 12px 16px; font-family: var(--font-mono); font-size: 13px; line-height: 1.5; overflow-x: auto; color: var(--text-primary); margin: 0; }
@@ -998,11 +1019,11 @@ input::placeholder { color: var(--text-disabled); }
 .feed-content th { background: var(--bg-surface); padding: 6px 12px; text-align: left; font-weight: 600; border: 1px solid var(--border); color: var(--text-secondary); }
 .feed-content td { padding: 5px 12px; border: 1px solid var(--border); color: var(--text-primary); }
 .feed-content tr:nth-child(even) td { background: var(--bg-surface); }
+.feed-content hr, .ai-message hr { border: none; border-top: 1px solid var(--border); margin: 12px 0; }
 .inline-code { background: var(--bg-input); padding: 2px 6px; border-radius: 4px; font-family: var(--font-mono); font-size: 13px; color: var(--accent-muted); }
 .msg-h3 { font-size: 16px; font-weight: 700; color: var(--text-primary); margin: 10px 0 4px; display: block; }
 .msg-h4 { font-size: 14px; font-weight: 700; color: var(--text-secondary); margin: 8px 0 3px; display: block; }
-.msg-bullet { display: block; padding-left: 16px; position: relative; margin: 1px 0; }
-.msg-bullet::before { content: '\2022'; position: absolute; left: 4px; color: var(--accent); }
+.msg-bullet { display: block; padding-left: 4px; margin: 1px 0; color: var(--text-primary); }
 .msg-step { display: flex; gap: 8px; align-items: baseline; margin: 1px 0; }
 .msg-step-num { color: var(--accent); font-weight: 700; font-family: var(--font-mono); font-size: 13px; flex-shrink: 0; min-width: 20px; }
 .studio-cursor { display: inline-block; width: 8px; height: 16px; background: var(--accent); margin-left: 2px; vertical-align: text-bottom; animation: blink 0.8s step-end infinite; }
@@ -1051,6 +1072,47 @@ input::placeholder { color: var(--text-disabled); }
   cursor: pointer; transition: all 0.15s; flex-shrink: 0;
 }
 .studio-stop-btn:hover { opacity: 0.8; }
+
+/* ── Image Attachments ── */
+.studio-attach-btn {
+  width: 42px; height: 42px; padding: 0; display: flex; align-items: center; justify-content: center;
+  border-radius: var(--radius); background: var(--bg-card); color: var(--text-tertiary);
+  border: 1px solid var(--border); cursor: pointer; transition: all 0.15s; flex-shrink: 0;
+}
+.studio-attach-btn:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); background: var(--accent-bg); }
+.studio-attach-btn:disabled { opacity: 0.3; cursor: not-allowed; }
+.studio-image-previews {
+  display: flex; gap: 10px; padding: 10px 8px; flex-wrap: wrap; justify-content: center;
+}
+.studio-image-preview {
+  position: relative; width: 110px; height: 110px; border-radius: var(--radius-lg);
+  overflow: hidden; border: 2px solid var(--border); background: var(--bg-surface);
+  transition: border-color 0.2s;
+}
+.studio-image-preview:hover { border-color: var(--accent-dim); }
+.studio-image-preview img {
+  width: 100%; height: 100%; object-fit: cover;
+}
+.studio-image-remove {
+  position: absolute; top: 4px; right: 4px; width: 24px; height: 24px;
+  border-radius: 50%; background: rgba(0,0,0,0.75); color: #fff; border: none;
+  font-size: 14px; font-weight: 600; cursor: pointer; display: flex; align-items: center;
+  justify-content: center; line-height: 1; transition: background 0.15s;
+  backdrop-filter: blur(4px);
+}
+.studio-image-remove:hover { background: var(--error); }
+
+/* ── Feed Images (in chat messages) ── */
+.feed-images {
+  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 6px;
+}
+.feed-image {
+  max-width: 240px; max-height: 180px; border-radius: var(--radius);
+  border: 1px solid var(--border); object-fit: cover; cursor: pointer;
+  transition: transform 0.15s, border-color 0.15s;
+}
+.feed-image:hover { transform: scale(1.03); border-color: var(--accent-dim); }
+
 .studio-input-hint { font-size: 11px; color: var(--text-disabled); text-align: center; margin-top: 6px; }
 
 /* ── Collapsed Messages ── */