ai smart auto-documentation and text rewrite

- Store captureMetadata (OCR text, window/app/element info) with each
  step at capture time so AI always has the original rich context.
- Add buildCaptureContext() to TextIntelService; capture.js uses it
  instead of buildCaptureTitle() so both title and metadata come from
  one pass.
- generateStepPatch() prefers stored captureMetadata over re-running
  OCR, giving the AI the best possible context when the user clicks
  an AI button later.
- Add autoDoc setting: when enabled every capture (shoot, region, and
  session hotkey/click) is automatically documented by AI. Manual
  captures await AI before returning; session captures fire-and-forget
  and push a step:updated event so the renderer reloads seamlessly.
- Add ai:rewriteText IPC and rewriteText() method for plain-text
  polishing via a separate callOllamaText() that skips JSON mode.
- Add "AI Rewrite" section in the editor right panel: textarea + AI
  button that rewrites whatever the user types in place.
- Improve buildAiPrompt() rules: action-focused title instructions,
  explicit anti-junk rules (no "Capture the screen / OCR" blocks),
  and a context-quality gate that suppresses blocks when context is
  thin.
- Add autoDoc checkbox to AI settings dialog.
- Renderer handles step:updated to reload the selected step after
  background auto-doc finishes.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

app/renderer/editor.js

@@ -167,6 +167,7 @@ class GuideEditor {
     const buttons = [
       this.dom?.titleAiBtn,
       this.dom?.descAiBtn,
+      this.dom?.rewriteAiBtn,
       ...(this.dom?.blocksList ? [...this.dom.blocksList.querySelectorAll('button[data-ai-action]')] : []),
     ].filter(Boolean);
     for (const button of buttons) {
@@ -222,6 +223,36 @@ class GuideEditor {
     return this.runAiGeneration('all', { button });
   }
 
+  async runTextRewrite(button = null) {
+    if (!this.isAiEnabled()) {
+      this.onToast('Enable AI in Settings first.', { error: true });
+      return;
+    }
+    const text = this.dom?.rewriteInput?.value?.trim();
+    if (!text) {
+      this.onToast('Type some text to rewrite first.', { error: true });
+      return;
+    }
+    if (button) setButtonLoading(button, true, 'Rewriting…');
+    try {
+      const result = await api.ai.rewriteText({
+        text,
+        guideTitle: this.guide?.title || '',
+        stepTitle: this.currentStep?.title || '',
+      });
+      if (!result || !result.ok) {
+        this.onToast(result?.reason || 'Rewrite failed.', { error: true });
+        return;
+      }
+      if (this.dom?.rewriteInput) this.dom.rewriteInput.value = result.text;
+      this.onToast('Text rewritten.');
+    } catch (err) {
+      this.onToast(err.message || 'Rewrite failed.', { error: true });
+    } finally {
+      if (button) setButtonLoading(button, false);
+    }
+  }
+
   async generateBlockWithAi(kind, block, button = null) {
     if (!block) return null;
     return this.runAiGeneration('block', { blockId: block.id, button });
@@ -411,6 +442,21 @@ class GuideEditor {
             this.dom.addTableBlockBtn = el('button', { type: 'button' }, '+ Table'),
           ),
         ),
+        el('section', {},
+          el('div.row', { style: { justifyContent: 'space-between', alignItems: 'center' } },
+            el('h3', { style: { margin: 0 } }, 'AI Rewrite'),
+            this.dom.rewriteAiBtn = el('button.ai', {
+              type: 'button',
+              title: 'Rewrite the text below with AI',
+              dataset: { aiAction: 'rewrite', aiTitle: 'Rewrite with AI' },
+            }, 'Rewrite'),
+          ),
+          this.dom.rewriteInput = el('textarea', {
+            rows: 3,
+            placeholder: 'Type something to improve…',
+            style: { width: '100%', resize: 'vertical' },
+          }),
+        ),
         el('section', {},
           el('h3', {}, 'Guide'),
           this.dom.guideSummary = el('div.muted', {}),
@@ -583,6 +629,8 @@ class GuideEditor {
     });
     this.dom.descAiBtn.addEventListener('click', () => this.generateDescriptionWithAi(this.dom.descAiBtn));
 
+    this.dom.rewriteAiBtn.addEventListener('click', () => this.runTextRewrite(this.dom.rewriteAiBtn));
+
     this.dom.descEditor.addEventListener('paste', (e) => {
       // Keep pasted text simple; backend sanitization will handle the rest.
       e.preventDefault();