fix: escape apostrophe in FORM_HELP_LABELS string (Database.php:2005)

app/migrations/applied/004_add_form_help_blocks.sql

@@ -0,0 +1,26 @@
+-- Form help blocks: stores per-fieldset student-facing explanatory text
+-- displayed in the /partage share-link submission form.
+-- Each row is keyed by a stable slug matching TODO locations in partage/index.php.
+
+CREATE TABLE IF NOT EXISTS form_help_blocks (
+    key        TEXT PRIMARY KEY,
+    content    TEXT NOT NULL DEFAULT '',
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TRIGGER IF NOT EXISTS update_form_help_blocks_timestamp
+AFTER UPDATE ON form_help_blocks
+BEGIN
+    UPDATE form_help_blocks SET updated_at = CURRENT_TIMESTAMP WHERE key = NEW.key;
+END;
+
+-- Seed the eight block slots referenced in partage/index.php.
+INSERT OR IGNORE INTO form_help_blocks (key, content) VALUES
+    ('partage_intro',     ''),
+    ('fieldset_tfe_info', ''),
+    ('fieldset_synopsis', ''),
+    ('fieldset_jury',     ''),
+    ('fieldset_academic', ''),
+    ('fieldset_files',    ''),
+    ('fieldset_access',   ''),
+    ('fieldset_email',    '');