fix: replace 6-word limit with 150-character limit for project names (#1077)

Replaces the word-based validation with character-based validation
as originally requested in #971. The 6-word limit was causing issues
with small words and separators being counted equally, and didn't
match the original requirement for a character limit.

Changes:
- Backend: Replace wordCount validator with len validator (1-150 chars)
- Frontend: Replace word count validation with character length check
- UI already has line-clamp-3 for display truncation

Fixes #998

backend/models/project.js

@@ -23,17 +23,9 @@ module.exports = (sequelize) => {
                     notEmpty: {
                         msg: 'Project name is required',
                     },
-                    wordCount(value) {
-                        const MAX_WORDS = 6;
-                        const wordCount = value
-                            .trim()
-                            .split(/\s+/)
-                            .filter((word) => word.length > 0).length;
-                        if (wordCount > MAX_WORDS) {
-                            throw new Error(
-                                `Project name must be ${MAX_WORDS} words or less`
-                            );
-                        }
+                    len: {
+                        args: [1, 150],
+                        msg: 'Project name must be between 1 and 150 characters',
                     },
                 },
             },

frontend/components/Project/ProjectModal.tsx

@@ -268,16 +268,12 @@ const ProjectModal: React.FC<ProjectModalProps> = ({
             return;
         }
 
-        const MAX_WORDS = 6;
-        const wordCount = formData.name
-            .trim()
-            .split(/\s+/)
-            .filter((word) => word.length > 0).length;
-        if (wordCount > MAX_WORDS) {
+        const MAX_LENGTH = 150;
+        if (formData.name.trim().length > MAX_LENGTH) {
             setError(
                 t(
                     'errors.projectNameTooLong',
-                    `Project name must be ${MAX_WORDS} words or less`
+                    `Project name must be ${MAX_LENGTH} characters or less`
                 )
             );
             return;