fix: Enforce Python tool execution for plots and sanitize raw LaTeX figure tags in Web UI

controlai_agent/prompts.py

@@ -14,8 +14,10 @@ When answering theoretical principles, derivations, proofs, comparisons, or limi
 
 ### Strict Negative & Formatting Constraints:
 1. **ZERO EMOJIS**: NEVER use any emojis anywhere in your response (absolutely NO checkmarks, NO pins, NO graphs, NO rockets, NO lightbulbs).
-2. **Standard LaTeX Math**: Format all mathematical formulas and fractions with valid LaTeX syntax (e.g. `$\\frac{\\omega_n^2}{s^2 + 2\\zeta\\omega_n s + \\omega_n^2}$`).
-3. **Deterministic Grounding**: When a tool executes successfully, present the exact numerical results and generated plot.
-4. **No Infinite Retries**: If a tool returns an error, correct the parameters or synthesize the analytical answer directly.
-5. **No Forced Citations**: Do NOT cite arbitrary random file paths unless the user explicitly requests literature references.
+2. **NO RAW LATEX DOCUMENT TAGS**: NEVER output `\begin{figure}`, `\includegraphics`, `\caption`, `\centering`, `\section*`, or `\end{figure}`. You are generating web markdown, not a PDF compilation. Use standard markdown headers (e.g. `### Section Title`).
+3. **MANDATORY TOOL CALL FOR PLOTS**: When asked to plot, visualize, or simulate (Nyquist plot, Bode diagram, Root Locus, Step Response, Phase Portrait), NEVER hallucinate a fake image filename. You MUST explicitly call `execute_python_code` (using `control as ct` or `matplotlib.pyplot`) or `simulate_step_response` to generate and display the real plot!
+4. **Standard LaTeX Math**: Format all mathematical formulas and fractions with valid math syntax (e.g. `$\frac{\omega_n^2}{s^2 + 2\zeta\omega_n s + \omega_n^2}$`).
+5. **Deterministic Grounding**: When a tool executes successfully, present the exact numerical results and generated plot.
+6. **No Infinite Retries**: If a tool returns an error, correct the parameters or synthesize the analytical answer directly.
+7. **No Forced Citations**: Do NOT cite arbitrary random file paths unless the user explicitly requests literature references.
 """

web/app.js

@@ -145,6 +145,27 @@ document.addEventListener('DOMContentLoaded', () => {
     const mathPlaceholders = [];
     let text = rawText;
 
+    // Clean up any raw LaTeX document structure artifacts
+    text = text.replace(/\\section\*?\{([\s\S]*?)\}/g, '### $1\n\n');
+    text = text.replace(/\\subsection\*?\{([\s\S]*?)\}/g, '#### $1\n\n');
+    text = text.replace(/\\subsubsection\*?\{([\s\S]*?)\}/g, '##### $1\n\n');
+    text = text.replace(/\\begin\{figure\}[\s\S]*?\\end\{figure\}/g, (match) => {
+      const capMatch = match.match(/\\caption\{([\s\S]*?)\}/);
+      const imgMatch = match.match(/\\includegraphics.*?\{([^\}]+)\}/);
+      let out = '';
+      if (imgMatch) {
+        const fname = imgMatch[1].trim();
+        out += `\n\n![${capMatch ? capMatch[1] : 'Simulation Plot'}](/plots/${fname})\n\n`;
+      }
+      if (capMatch && !imgMatch) {
+        out += `\n\n*${capMatch[1]}*\n\n`;
+      }
+      return out;
+    });
+    text = text.replace(/\\(centering|begin\{center\}|end\{center\})/g, '');
+    text = text.replace(/\\includegraphics.*?\{([^\}]+)\}/g, '![$1](/plots/$1)');
+    text = text.replace(/\\caption\{([\s\S]*?)\}/g, '*$1*');
+
     // 1. Extract Display Math: $$ ... $$
     text = text.replace(/\$\$([\s\S]*?)\$\$/g, (match, formula) => {
       const ph = `@@MATH_BLOCK_${mathPlaceholders.length}@@`;

web/index.html

@@ -226,6 +226,6 @@
     </div>
   </div>
 
-  <script src="/static/app.js?v=20260818_edge_scroll"></script>
+  <script src="/static/app.js?v=20260819_figure_sanitize"></script>
 </body>
 </html>