add source links to all citations, fix DE to neutral tone (no Sie/Du)

Source links added for: Surgeon General advisory, Meta MYST study,
APA advisory, JAMA Psychiatry, Weill Cornell Medicine, World Happiness
Report, EU Commission DSA finding, Amnesty International. All 3 langs.

DE article rewritten to impersonal/neutral form — no Sie/Ihre in
parent advice section or crosslinks.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

content/en/tech-companies-addiction-business-model.md

@@ -37,11 +37,11 @@ Internal documents from major platforms have revealed that companies were aware
 
 In 2021, leaked internal research from Meta showed that the company knew Instagram was linked to body image issues and depression among teenage girls. The company did not make these findings public or change the product significantly.
 
-In 2023, the U.S. Surgeon General Vivek Murthy issued a formal advisory on social media and youth mental health, warning that current evidence indicates social media poses "a profound risk of harm" to children and adolescents. He later called for warning labels on social media platforms — a step that would require Congressional action.
+In 2023, the [U.S. Surgeon General](https://www.hhs.gov/surgeongeneral/reports-and-publications/youth-mental-health/social-media/index.html) Vivek Murthy issued a formal advisory on social media and youth mental health, warning that current evidence indicates social media poses "a profound risk of harm" to children and adolescents. He later called for warning labels on social media platforms — a step that would require Congressional action.
 
-A Meta-sponsored study published in 2026 found that trauma-exposed children are the most vulnerable to social media dependency, and that parental controls are largely ineffective once dependency is established.
+A [Meta-sponsored study](https://techcrunch.com/2026/02/17/metas-own-research-found-parental-supervision-doesnt-really-help-curb-teens-compulsive-social-media-use/) published in 2026 found that trauma-exposed children are the most vulnerable to social media dependency, and that parental controls are largely ineffective once dependency is established.
 
-The American Psychological Association has issued its own health advisory on adolescent social media use, echoing the Surgeon General's concerns about the impact on developing minds.
+The [American Psychological Association](https://www.apa.org/topics/social-media-internet/health-advisory-adolescent-social-media-use) has issued its own health advisory on adolescent social media use, echoing the Surgeon General's concerns about the impact on developing minds.
 
 {{< addiction-stat num="5h" color="#667eea" label="Average daily social media use among teenagers — Gallup/Pew Research" >}}
 
@@ -52,13 +52,13 @@ The scale of the problem is difficult to overstate.
 - **95%** of children aged 10–17 use social media regularly
 - Teenagers spend an average of **5 hours per day** on social media platforms
 - **47%** of teenagers report feeling addicted to social media
-- Using social media for **3 or more hours daily** is linked to significantly higher rates of anxiety and depression, according to research published in JAMA Psychiatry
-- Children with social media addiction are **2–3 times more likely** to experience suicidal ideation, according to research from Weill Cornell Medicine
+- Using social media for **3 or more hours daily** is linked to significantly higher rates of anxiety and depression, according to research published in [JAMA Psychiatry](https://jamanetwork.com/journals/jamapsychiatry/fullarticle/2749480)
+- Children with social media addiction are **2–3 times more likely** to experience suicidal ideation, according to research from [Weill Cornell Medicine](https://news.weill.cornell.edu/news/2025/06/study-finds-addictive-screen-use-not-total-screen-time-linked-to-youth-suicide-risk)
 - **45%** of U.S. teens report that social media negatively affects their sleep
 
 {{< addiction-stat num="2-3x" color="#ef4444" label="Higher risk of suicidal ideation with social media addiction — Weill Cornell Medicine" >}}
 
-The 2026 World Happiness Report documented that social media is "harming adolescents at a scale large enough to cause changes at the population level" — one of the strongest statements from a major global research initiative to date.
+The 2026 [World Happiness Report](https://www.worldhappiness.report/ed/2026/social-media-is-harming-adolescents-at-a-scale-large-enough-to-cause-changes-at-the-population-level/) documented that social media is "harming adolescents at a scale large enough to cause changes at the population level" — one of the strongest statements from a major global research initiative to date.
 
 ## Courts Are Catching Up
 
@@ -78,11 +78,11 @@ The legal claims focus specifically on **addictive design elements** — infinit
 
 The European Union has taken the most direct regulatory action against addictive design to date.
 
-In February 2026, the European Commission issued a preliminary finding that **TikTok breached the Digital Services Act (DSA)** specifically because of its addictive design architecture. This was the first time the EU directly targeted the combination of infinite scroll, autoplay, push notifications, and personalized recommendations as a systemic risk to minors and vulnerable adults. TikTok faces potential fines of up to **6% of its worldwide annual turnover**.
+In February 2026, the [European Commission](https://digital-strategy.ec.europa.eu/en/news/commission-preliminarily-finds-tiktoks-addictive-design-breach-digital-services-act) issued a preliminary finding that **TikTok breached the Digital Services Act (DSA)** specifically because of its addictive design architecture. This was the first time the EU directly targeted the combination of infinite scroll, autoplay, push notifications, and personalized recommendations as a systemic risk to minors and vulnerable adults. TikTok faces potential fines of up to **6% of its worldwide annual turnover**.
 
 In October 2025, the Commission found that both TikTok and Meta had systematically blocked researchers from studying how content reaches children on their platforms — a violation of DSA transparency requirements. The combined potential fines could reach approximately **$20 billion**.
 
-Research by Amnesty International in France found that TikTok's algorithm draws children who show interest in mental health topics into spirals of content romanticizing self-harm and suicide.
+Research by [Amnesty International](https://www.amnesty.org/en/latest/news/2025/10/tiktok-steering-children-towards-depressive-and-suicidal-content/) in France found that TikTok's algorithm draws children who show interest in mental health topics into spirals of content romanticizing self-harm and suicide.
 
 The EU's action reflects a growing political consensus in Europe that addictive platform design is not a side effect but a core business strategy — and that regulation must target the business model itself, not just the content it amplifies.